TWI585557B - Programmable logic control system - Google Patents

Description

Programmable logic controller system

The present invention relates to a programmable logic controller system in which a plurality of units are connected.

In the past, in the Programmable Logic Controller (PLC) system, a basic block is constructed, that is, a power supply unit is disposed at the start end, and a central processing device is connected to the power supply unit (Central Processing). Unit; CPU) unit, followed by the CPU unit to configure the input and output unit or other units with other functions. In addition, the units are connected together by a base unit for communication inside and outside the PLC system.

In the PLC system in which the CPU unit and other units are connected as described above, when the PLC system operates, current flows through the substrates and components inside the unit, and the components generate heat. When the heat generation of the part continues, the temperature inside the unit rises remarkably, and the function and performance of the part or unit deteriorate, and the life of the part is shortened. Therefore, in order for the PLC system to operate normally, it is necessary to make the temperature inside the unit not significantly rise due to the heat generation of the components inside the unit.

a method of managing the temperature of a unit in a PLC system In the following Patent Document 1, a data transmission path is provided between a CPU unit of a main body device and a power supply unit of the main unit and a power supply unit of the external device. In addition, each power supply unit is provided with a temperature detector, and the internal temperature is measured and the data is stored in the power supply unit only when the power supply unit is turned on (on) and in response to a command from the CPU to transmit data to the CPU unit. Non-volatile internal memory (memory).

(previous technical literature) (Patent Literature)

Patent Document 1: Japanese Patent Laid-Open Publication No. 2006-294007

However, in the PLC device of Patent Document 1, only the temperature monitoring of the power supply unit is performed. Therefore, even if the internal temperature of the other plurality of cells rises, the temperature management of the cells does not proceed, and the control for suppressing the temperature rise of the cells cannot be performed.

Further, by installing the temperature monitoring function to the PLC system as in the PLC device of Patent Document 1, the temperature value in the PLC system can be measured. However, in the PLC device of Patent Document 1, the temperature inside the power supply unit is monitored at any time, so that the power consumption of the PLC device increases. In addition, due to the increase in power consumption, the cost required to operate the PLC device increases, resulting in an increase in the management cost of the PLC device.

The present invention has been made in view of the above circumstances, and aims to obtain a PLC capable of connecting a CPU unit and a unit having other functions. A PLC system in which the temperature value in the unit is controlled with low power consumption in the system.

In order to solve the above problems and achieve the object, the programmable logic controller system of the present invention has a basic block in which the power supply unit, the central calculation unit, and the functional unit as the functional unit have the power supply unit and The general unit having different functions of the central calculation unit and the first end unit disposed at the end with respect to the power supply unit are arranged adjacent to each other in abutting state, and are connected via a connector between the functional units. And electrically connected and connected to enable communication; the general unit includes: a temperature monitoring unit that intermittently detects a temperature value in the functional unit at a predetermined timing; and a cooling unit that performs the functional unit The internal calculation unit includes: the temperature monitoring unit; the cooling unit; and the temperature control unit, wherein the temperature value detected by the temperature monitoring unit of the functional unit of the basic block corresponds to the temperature value Comparing the aforementioned functional units of the basic block with the predetermined values set in advance The result of the comparison of the detected value and the predetermined operation performed through the portion of the cooling temperature of the functional unit comparing control value.

The PLC system of the present invention achieves the effect of being able to control the temperature value in the cell with low power consumption in a PLC system in which a CPU unit and a unit having other functions are connected.

1, 2‧‧‧ PLC system

10, 210‧‧‧ basic squares

11‧‧‧Power unit

12‧‧‧Central calculation unit (CPU unit)

Target units 13-1 to 13-4, 22-1 to 22-4‧‧

14, 23‧‧‧ end caps

15‧‧‧Internal busbar

16‧‧‧ Bus bar connector

17‧‧‧Branch unit

21‧‧‧Additional unit

50‧‧‧ Temperature Monitoring Department

51‧‧‧Unit Communication Department

52‧‧‧ Temperature Value Detection Department

53‧‧‧ Temperature Value Memory Department

60‧‧‧Cooling Control Department

70‧‧‧ Cooling Department

80‧‧‧ Temperature Control Management Department

81‧‧‧CPU Unit Communication Department

82‧‧‧Specified value memory

83‧‧‧Comparative Department

84‧‧‧Comparative Results Memory

90‧‧‧CPU

100‧‧‧Display Department

110‧‧‧Function Processing Department

220‧‧‧Additional Blocks

230‧‧‧Additional cable

Fig. 1 is a view schematically showing a configuration example of a PLC system according to a first embodiment of the present invention.

Fig. 2 is a block diagram schematically showing the functional configuration of a CPU unit according to Embodiment 1 of the present invention.

Fig. 3 is a block diagram schematically showing the functional configuration of a target unit and an end cover according to the first embodiment of the present invention.

Fig. 4 is a block diagram schematically showing the functional configuration of a temperature monitoring unit according to the first embodiment of the present invention.

Fig. 5 is a block diagram schematically showing the functional configuration of a temperature control management unit according to the first embodiment of the present invention.

Fig. 6 is a flow chart showing a procedure example of temperature control processing in a unit in the PLC system according to the first embodiment of the present invention.

Fig. 7 is a flow chart showing a procedure example of the detection processing and the cooling control processing of the target unit internal temperature value in the temperature control processing in the unit according to the first embodiment of the present invention.

Fig. 8 is a view schematically showing a configuration example of a PLC system according to a second embodiment of the present invention.

Fig. 9 is a flow chart showing a procedure example of the temperature monitoring process in the second embodiment of the present invention.

Hereinafter, the programmable logic controller system according to the first embodiment of the present invention will be described in detail with reference to the drawings. Further, the present invention is not limited by the following embodiments.

Embodiment 1.

Fig. 1 is a view schematically showing a configuration example of the PLC system 1 according to the first embodiment of the present invention. Fig. 2 is a block diagram schematically showing the functional configuration of the CPU unit 12 of the first embodiment. Fig. 3 is a block diagram schematically showing the functional configuration of the target units 13-1 to 13-4 and the end cover 14 of the first embodiment. The PLC system 1 has a configuration in which a unit is directly connected, that is, units that are adjacently arranged are directly connected to each other in a state of being in contact with each other. The PLC system 1 has a basic block 10. The basic block 10 has the following functional units with individual functions: a power supply unit 11 that supplies voltage to cells in the basic block 10; a CPU unit 12 that manages the entire PLC system; and a target unit 13-1 to 13-4. An input/output unit or a general unit having other functions; and an end cap 14, which is an end unit that represents the end of the block and performs end processing of the block.

All the units of the power supply unit 11, the CPU unit 12, the target units 13-1 to 13-4, and the end cover 14 belonging to the end unit are in a state in which the adjacently disposed units are in contact with each other, and are connected to each unit via The bus connectors 16 of the internal bus 15 are connected. The internal bus bar 15 in each unit and the bus bar connector 16 connected to the adjacent unit function as a voltage supply line and a signal transmission path for information communication between the units. Each component in each unit is connected by an internal bus bar 15. Each unit is capable of communicating information between the units via the internal bus bar 15 and the bus bar connector 16. In addition, from the power supply unit 11, via the internal bus bar 15 and the bus bar connector 16 to other units Supply voltage. Further, in the present example, the case where four target units 13-1 to 13-4 are arranged is displayed, but the number of target units is not limited to four.

The power supply unit 11 supplies a voltage to the connected CPU unit 12 via the bus bar connector 16. Further, the power supply unit 11 supplies voltages to the target units 13-1 to 13-4 and the end cover 14 via the CPU unit 12. That is, the power supply unit 11 supplies voltage to the CPU unit 12 to the end cover 14 via the internal bus bar 15 in each unit and the bus bar connector 16 that connects the adjacent units.

As shown in FIG. 2, the CPU unit 12 includes a temperature monitoring unit 50 that intermittently detects a temperature value in a functional unit at a predetermined timing, and a cooling control unit 60 that controls cooling processing in the functional unit. The cooling unit 70 performs cooling processing in the functional unit, and the temperature control management unit 80 compares the temperature value detected by the temperature monitoring unit 50 of the functional unit with a predetermined value that is previously set in advance corresponding to the functional unit. According to the result of the comparison, the operation of the cooling unit 70 of the functional unit that detects the temperature value that has been compared with the predetermined value is controlled; the CPU 90 manages the control of the entire CPU unit 12 and the PLC system; and the display unit 100, shows the temperature value in each unit. The temperature control management unit 80 manages temperature monitoring processing and cooling processing of the functional unit 12. The CPU unit 12 can communicate with other units via a communication unit (not shown). The temperature monitoring unit 50, the cooling control unit 60, the temperature control management unit 80, and the CPU 90 can be configured by an electronic circuit, and can be configured by a microcomputer.

As shown in Figure 3, target units 13-1 to 13-4 and ends The cover 14 includes a temperature monitoring unit 50, a cooling control unit 60, a cooling unit 70, and a function processing unit 110 that performs functional processing specific to each unit. Further, the target units 13-1 to 13-4 and the end cover 14 can communicate with other units via a communication unit (not shown).

Fig. 4 is a block diagram schematically showing the functional configuration of the temperature monitoring unit 50 of the first embodiment. The temperature monitoring unit 50 includes a unit communication unit 51 belonging to the communication function unit, a temperature value detecting unit 52 of the internal temperature value of the detecting unit, and a temperature value storage unit 53 of the memory unit belonging to the memory temperature value. The temperature monitoring unit 50 can be configured by an electronic circuit, and an integrated circuit (IC) can be used.

The unit communication unit 51 has a function of performing information communication with other units via the internal bus bar 15 and the bus bar connector 16. In addition to communication between the temperature monitoring unit 50 and other units, the unit communication unit 51 also functions as a communication unit between the own unit and other units. Therefore, the unit communication unit 51 can also be provided separately from the temperature monitoring unit 50.

The temperature value detecting unit 52 is configured to include a temperature sensor of the internal temperature value of the detecting unit, that is, a temperature value of the inside of the detecting unit. The temperature value detecting unit 52 performs monitoring processing of the internal temperature value of the unit, that is, detection processing, using the temperature sensor. The temperature value detecting unit 52 outputs a temperature value corresponding to the detected value of the temperature sensor. The temperature value detecting unit 52 detects the temperature value inside the unit based on the in-unit temperature value detection instruction information that is input from the CPU unit 12 and instructs the detection of the internal temperature of the unit. The temperature value output from the temperature value detecting unit 52 is input to the temperature value storage unit 53 inside the unit that has been detected and stored. Internal unit The temperature value is the internal temperature of the unit.

As the temperature sensor of the temperature value detecting portion 52, a temperature sensor such as a thermistor or a thermocouple can be used. When a thermistor is used as the temperature sensor, the temperature value detecting portion 52 can be configured by including a circuit for measuring the resistance value of the thermistor and a circuit for converting the measured resistance value into a temperature value. Further, when a thermocouple is used as the temperature sensor, the temperature value detecting portion 52 can be configured by including a circuit for measuring the electromotive force of the thermocouple and a circuit for converting the measured electromotive force into a temperature value.

Regarding the setting position of the temperature sensor, it can be any position as long as it can detect the temperature inside the unit. As an example, the temperature sensor is disposed adjacent to the heat generating component within the unit. Further, the temperature sensor may be provided at a plurality of positions in the unit, and the temperature value detecting unit 52 generates a temperature value by performing a predetermined calculation such as averaging the output values of the plurality of temperature sensors.

The temperature value storage unit 53 stores the temperature value inside the unit detected by the temperature value detecting unit 52.

The cooling control unit 60 controls the operation of the cooling unit 70 based on the cooling unit operation instruction information that is input from the comparison unit 83 to be described later and instructs the operation or operation state of the cooling unit 70 to continue. Further, the cooling control unit 60 controls the stop of the cooling unit 70 based on the cooling unit stop instruction information that is input from the comparison unit 83 and instructs the stop or stop state of the operation of the cooling unit 70 to continue. The cooling control unit 60 can be configured by an electronic circuit, and an IC can be used.

The cooling unit 70 cools the inside of the unit to lower the temperature of the components including the heat generating components in the unit and the temperature in the unit, thereby suppressing the temperature rise of the heat generating component. By operating the cooling unit 70, the temperature of the heat generating component in the unit is lowered, and the life of the heat generating component and the life of the unit can be extended. The cooling unit 70 can use a water-cooled micro cooler.

Fig. 5 is a block diagram schematically showing the functional configuration of the temperature control management unit 80 of the first embodiment. The temperature control management unit 80 includes a CPU unit communication unit 81 belonging to the communication function unit, a predetermined value storage unit 82, a comparison unit 83, and a comparison result storage unit 84. The temperature control management unit 80 can be configured by an electronic circuit, and can use an IC.

The CPU unit communication unit 81 has a function of performing information communication with the CPU unit 12 and the unit communication unit 51 of another unit via the internal bus bar 15 and the bus bar connector 16. The CPU unit 12 reads the temperature value detected by each unit and stored in the temperature value storage unit 53 through the CPU unit communication unit 81.

The predetermined value storage unit 82 stores a predetermined reference temperature value which is lower than a temperature which may cause a heat-induced hazard to the normal operation of the PLC system 1 when the PLC system 1 is operated. temperature. In other words, the predetermined value storage unit 82 stores a predetermined reference temperature value for each unit, and the predetermined reference temperature value for each unit is possible for the CPU unit 12 and the target units 13-1 to 13-4. And the normal operation of the end cap 14 produces a low temperature hazard from heat. Hereinafter, the predetermined reference temperature value is referred to as a predetermined value. As an example of a prescribed value, The upper limit of the internal temperature value at which a unit can operate normally is 65 ° C, and the specified value is 60 ° C. This predetermined value is a reference value when it is determined whether or not the cooling unit 70 of each unit is to be operated, and the internal temperature value of each unit can be regarded as a temperature value of an allowable upper limit in the normal range. The predetermined value is individually set for the CPU unit 12, the target units 13-1 to 13-4, and the end cap 14, and is stored in advance in the predetermined value storage unit 82.

The comparison unit 83 compares the temperature value in the cell input from the cell communication unit 51 of the temperature monitoring unit 50 of the CPU unit 12 or another unit with a predetermined value stored in the predetermined value storage unit 82 and corresponding to each unit, and compares them. The result is stored in the comparison result storage unit 84. In other words, the comparison unit 83 causes the comparison result between the temperature value in the cell and the predetermined value to be stored in the comparison result storage unit 84 for each unit.

The comparison result storage unit 84 stores a comparison result between the temperature value of a certain unit executed by the comparison unit 83 and a predetermined value.

The CPU 90 is a control unit that manages the control of the entire PLC system by performing communication between the CPU unit 12 and other units.

The display unit 100 is a display unit that displays temperature values in each unit. By using the display unit 100, it is possible to monitor the internal temperature of each unit in the CPU unit 12. Further, the display unit 100 can display various information in the PLC system 1. The display unit 100 can use a display device such as a liquid crystal display (LCD).

The function processing unit 110 is a functional unit that performs processing unique to each unit. The function processing unit 110 performs a predetermined process in accordance with an instruction from the CPU unit 12 while communicating with the CPU unit 12, for example. The function processing unit 110 can be configured by an electronic circuit, and an IC can be used.

Next, the temperature control processing in the unit in the PLC system 1 will be described. Fig. 6 is a flowchart showing a procedure example of temperature control processing in the unit in the PLC system 1 of the first embodiment. Fig. 7 is a flow chart showing a procedure example of the detection processing and the cooling control processing of the target unit internal temperature value in the temperature control processing in the unit of the first embodiment, and shows the steps of the flowchart shown in Fig. 6. (step) The details of the processing of S30.

First, in step S10, when the power of the PLC system 1 is turned on, the power supply unit 11 supplies a voltage to each unit of the basic block 10 via the bus bar connector 16 between the connection units. Thereby, the PLC system 1 is started. When a voltage is supplied to each unit, the unit communication unit 51 of each unit is in a state in which communication is possible.

Next, in step S20, the CPU 90 performs a process of accessing each unit via the internal bus bar 15 and the bus bar connector 16, and grasping the number of units connected to the PLC system 1 and the number of added blocks. For example, the CPU unit 12 acquires the configuration state of the cells in the basic block 10 of the PLC system 1. The CPU unit 12 acquires the management number of the non-volatile memory (not shown) stored in each unit, for example, thereby acquiring the arrangement state of each unit of the basic block 10. Next, each unit performs initial processing in accordance with the control of the CPU 90 of the CPU unit 12, and then starts processing of each unit. Thereby, the PLC system 1 operates.

Then, in step S30, the internal temperature is performed on the target unit which is the target of the detection processing and the cooling control processing of the internal temperature value. The detection processing of the degree value and the cooling control processing. Step S30 is intermittently performed after the predetermined processing of the CPU 90 ends, or at a predetermined period, or at the reset of the PLC system 1. The object unit is any one of the CPU unit 12 to the end cover 14 other than the power supply unit 11 in the basic block. Here, the case where the end cap 14 is initially used as the target unit will be described.

First, in step S31, detection and memory of the temperature value inside the target unit are performed. That is, the CPU unit communication unit 81 of the CPU unit 12 outputs the in-unit temperature value detection instruction information to the end cover 14. The in-unit temperature value detection instruction information is intermittently outputted after the predetermined processing of the CPU 90 ends, or at a predetermined period, or when the PLC system 1 is reset. The in-unit temperature value detection instruction information is input to the temperature value detecting unit 52 via the unit communication unit 51 of the temperature monitoring unit 50 of the end cover 14. The temperature value detecting unit 52 of the end cover 14 detects the temperature value inside the own unit based on the input unit temperature value detection instruction information. Next, the temperature value detecting unit 52 of the end cover 14 outputs the detected temperature value to the temperature value storage unit 53. The temperature value storage unit 53 of the end cover 14 memorizes the temperature value output from the temperature value detecting unit 52. The temperature value storage unit 53 can also store the temperature value in association with the time at which the memory is stored. When the temperature value is memorized to the temperature value storage portion 53, the unit communication portion 51 of the end cover 14 outputs the stored temperature value to the CPU unit 12 as a response to the in-unit temperature value detection instruction information. By the above processing, the temperature monitoring process of the end cover 14 is ended.

In addition, the CPU unit communication unit 81 can transmit a reading request notification of the temperature value to the unit communication unit 51 of the end cover 14 to make a memory. The temperature value of the temperature value storage unit 53 is output to the CPU unit 12. At this time, the unit communication unit 51 of the end cover 14 transmits the temperature value stored in the temperature value storage unit 53 to the CPU unit 12 in response to the response request notification of the temperature value.

The temperature value output from the end cover 14 is input to the comparison unit 83 of the temperature control management unit 80 via the CPU unit communication unit 81 of the temperature control management unit 80 of the CPU unit 12. When the comparison unit 83 receives the input of the temperature value output from the end cover 14, the temperature value input from the end cover 14 is compared with the predetermined value for the end cover 14 in step S32. In other words, the comparison unit 83 reads the predetermined value for the end cover 14 stored in the predetermined value storage unit 82. Next, the comparison unit 83 compares the temperature value input from the end cover 14 with a predetermined value for the end cover 14 obtained from the predetermined value storage unit 82. Specifically, the comparison unit 83 determines whether or not the temperature value input from the end cover 14 is larger than a predetermined value.

When the temperature value input from the end cover 14 is larger than the predetermined value, that is, YES in step S32, the comparison unit 83 causes the temperature value input from the end cover 14 to be compared with the predetermined value to be input to the comparison result. The memory unit 84 memorizes. In addition, the comparison unit 83 outputs the temperature value stored in the comparison result storage unit 84 when the temperature value is larger than the predetermined value, and outputs it to the display unit 100 via the CPU unit communication unit 81. The display unit 100 displays the temperature value when an input of the temperature value is obtained, and the temperature value of the display end cover 14 is larger than a predetermined value. By displaying the temperature value of the end cover 14 larger than the predetermined value on the display unit 100, the user can visually recognize that the end cover 14 is in a state requiring cooling.

In addition, the comparison unit 83 can also set the temperature value and the predetermined value. The temperature difference between them, that is, the rising temperature information, is output to the comparison result storage unit 84 together with the temperature value for memorization. Thereby, the comparison unit 83 can output the temperature value together with the rising temperature information to the display unit 100 for display.

Further, the comparing unit 83 performs a process of instructing the control of the cooling unit 70 of the end cover 14 based on the content of the comparison result. When the temperature value input from the end cover 14 is larger than the predetermined value, that is, YES in step S32, the comparison unit 83 performs the operation of the cooling unit 70 of the end cover 14 which is the target unit in step S33. deal with. In other words, the comparison unit 83 outputs the cooling unit operation instruction information to the cooling control unit 60 of the end cover 14.

When the input of the cooling unit operation instruction information is obtained, the cooling control unit 60 of the end cover 14 performs a process of operating the cooling unit 70 of the end cover 14 based on the cooling unit operation instruction information. Further, when the cooling unit 70 of the end cover 14 has been operated in advance, the cooling control unit 60 of the end cover 14 performs control for continuing the operation of the cooling unit 70.

Next, in step S34, the comparing unit 83 performs a process of operating the cooling unit 70 of the unit disposed adjacent to the end cover 14 of the target unit. In other words, the comparison unit 83 also outputs the cooling unit operation instruction information to the cooling control unit 60 of the unit disposed adjacent to the end cover 14. Here, the end cap 14 is tied at the end of the basic block 10. Therefore, the comparison unit 83 outputs the cooling unit operation instruction information to the cooling control unit 60 disposed in a unit that is disposed closer to the power supply unit 11 than the end cover 14 . In other words, the comparison unit 83 outputs the cooling unit operation instruction information to the cooling control unit 60 of the target unit 13-4.

When the input of the cooling unit operation instruction information is obtained, the target The cooling control unit 60 of the unit 13-4 performs processing for operating the cooling unit 70 of the target unit 13-4 based on the cooling unit operation instruction information. This is because the adjacent cells adjacent to the cell having a high temperature value are subjected to the heat possessed by the cell having a high temperature value, and the temperature rise inside the cell is accelerated by the heat. Further, when the cooling unit 70 of the target unit 13-4 is already operating in advance, the cooling control unit 60 of the target unit 13-4 performs control for continuing the operation state of the cooling unit 70.

In addition, since the end cap 14 is at the end of the basic block 10, the comparing portion 83 outputs the cooling portion operation instruction information to the cooling control portion of the unit disposed one side of the power supply unit 11 side of the end cover 14. 60. However, when the unit that detects the internal temperature value is any unit between the power supply unit 11 and the end cover 14, the comparison unit 83 outputs the cooling unit operation instruction information to the adjacent target unit that is disposed at the detected internal temperature value. The cooling control unit 60 of the two units on the side.

Next, in step S35, the comparing unit 83 determines whether or not there is a unit that does not detect the internal temperature value and is disposed adjacent to the target unit in the series of processes, that is, whether or not there is a temperature value that does not detect the adjacent unit.

When the adjacent unit is not detected in the temperature value in step S35, that is, in the case of YES in the step S35, the adjacent unit is not detected as the temperature unit, and the processing returns to the processing in the step S31. Here, since the end cap 14 is an end unit, it is determined whether or not there is a unit disposed one side closer to the power source unit 11 than the end cover 14 belonging to the target unit. In the first embodiment, the target unit 13-4 is disposed closer to the power supply unit 11 side than the end cover 14. Therefore, the target unit 13-4 becomes the temperature The value is not detected in the adjacent unit, and the processing in step S31 is carried out with the target unit 13-4 as the target unit.

Further, in step S35, when the adjacent unit is not detected without the temperature value, that is, "NO" in the step S35, the series of temperature control processing is ended.

On the other hand, if the temperature value input from the end cover 14 is equal to or less than the predetermined value in step S32, that is, if the determination in step S32 is NO, the comparison unit 83 performs the end of the target unit in step S36. The cooling unit 70 of the cover 14 is stopped. In other words, the comparison unit 83 outputs the cooling unit stop instruction information to the cooling control unit 60 of the end cover 14. Further, the comparison unit 83 may output a temperature value input from the end cover 14 and compared with a predetermined value to the comparison result storage unit 84 for storage.

When the input of the cooling unit stop instruction information is obtained, the cooling control unit 60 of the end cover 14 performs a process of stopping the cooling unit 70 of the end cover 14 based on the cooling unit stop instruction information. Further, when the cooling unit 70 of the end cover 14 has been previously stopped, the cooling control unit 60 of the end cover 14 performs control for continuing the stop state of the cooling unit 70. Thereby, the unnecessary operation of the cooling unit 70 can be eliminated, and the power consumption can be reduced.

Next, in step S37, the comparing unit 83 performs a process of stopping the cooling unit 70 of the unit disposed adjacent to the end cover 14 of the target unit. In other words, the comparison unit 83 also outputs the cooling unit stop instruction information to the cooling control unit 60 of the unit disposed adjacent to the end cover 14. Here, the end cap 14 is tied at the end of the basic block 10. Therefore, the comparison unit 83 outputs the cooling unit stop instruction information to be disposed closer to the power source unit 11 than the end cover 14. The cooling control unit 60 of the unit is provided on one side. In other words, the comparison unit 83 outputs the cooling unit stop instruction information to the cooling control unit 60 of the target unit 13-4.

When the input of the cooling unit stop instruction information is obtained, the cooling control unit 60 of the target unit 13-4 performs a process of stopping the cooling unit 70 of the target unit 13-4 based on the cooling unit stop instruction information. This is because the adjacent unit adjacent to the target unit whose temperature value is within the normal range does not have the heat of the target unit and is heated to cause the temperature rise inside the unit to accelerate. Thereby, the unnecessary operation of the cooling unit 70 can be eliminated, and the power consumption can be reduced. Further, when the cooling unit 70 of the target unit 13-4 has been previously stopped, the cooling control unit 60 of the target unit 13-4 performs control for continuing the stop state of the cooling unit 70. Next, after step S37, the process proceeds to step S35.

In the first embodiment, the processing of the above-described step S30, that is, the processing of steps S31 to S35, is sequentially performed from the end cover 14 to the CPU unit 12 for the six units of the end cover 14 to the CPU unit 12. Further, the processing of the foregoing step S30 is in the operation of the PLC system 1, intermittently facing the end cover 14 to the CPU after the predetermined processing of the CPU 90 ends, or during a predetermined period, or when the PLC system 1 is reset. Unit 12 is implemented repeatedly.

Further, in the above, the processing of step S30 is sequentially performed from the end cover 14 toward the CPU unit 12, but the processing of step S30 may be performed in the order from the CPU unit 12 toward the end cover 14.

Further, although the display unit 100 is provided in the CPU unit 12 in the above, the display unit 100 may be disposed in the basic block 10 . Display unit with the same function. Further, a display device having the same function as the display portion 100 may be disposed outside the basic block 10.

As described above, in the first embodiment, each of the CPU unit 12, the target units 13-1 to 13-4, and the end cover 14 in the PLC system 1 is provided with the temperature monitoring unit 50, the cooling control unit 60, and the cooling. Department 70. Thereby, it is possible to detect the temperature value inside each unit for monitoring. Further, the CPU unit 12 is provided with a temperature control management unit 80. Thereby, the cooling process in each unit can be controlled based on the comparison result between the temperature value detected by the temperature monitoring unit 50 and the predetermined value, and the temperature management control in each unit can be performed.

That is, in the operation of the PLC system 1, the temperature monitoring unit 50 of each unit intermittently detects the internal temperature value at an arbitrary timing and memorizes it. As described above, by monitoring the temperature value in the cell at any predetermined timing, it is possible to suppress the temperature value in the cell due to the temperature value in the monitoring unit compared to the temperature value in the monitoring unit at any time. The rise and the power required to monitor the temperature value.

Further, the temperature control management unit 80 of the CPU unit 12 transmits the temperature value detected and stored in each unit through the bus bar connector 16 between the connection units. The temperature control management unit 80 compares the temperature value with a predetermined value, and the cooling control unit 60 causes the cooling unit 70 to operate as long as the temperature value is larger than a predetermined value. By the operation of the cooling unit 70 attached to each unit, it is possible to individually suppress the rise of the internal temperature regardless of which unit. Further, the cooling control unit 60 stops the cooling unit 70 as long as the temperature value is equal to or lower than a predetermined value. As mentioned above, only when the temperature value in the unit is larger than the specified value By operating the cooling unit 70, the power consumption can be suppressed as compared with the case where the cooling in the unit is performed at any time. Further, since the temperature control management unit 80 is provided only in the CPU unit 12, the configuration is simple.

Further, since the temperature monitoring unit 50 stores the temperature value, the monitoring of the temperature value by the temperature monitoring unit 50 and the processing by the temperature control management unit 80 may not be performed successively. In other words, the processing performed by the temperature monitoring unit 50 is different from the processing performed by the temperature control management unit 80, whereby it is possible to suppress heat generation in the CPU unit 12 during the same period.

Further, when the temperature value of each unit is detected by the temperature monitoring unit 50 of each unit and the temperature value is larger than the predetermined value, the intention or temperature value is displayed on the display unit 100, whereby the visual The user recognizes the unit in a state in which cooling is required. Further, when the above display is not performed on the display unit 100, it can be recognized that the temperature level of the unit is within the normal range.

Further, in the first embodiment, the cooling unit 70 of the target unit whose temperature value is larger than the predetermined value is operated, and the adjacent unit adjacent to the unit is also cooled from the same timing as the target unit. Thereby, the temperature value of the component in the adjacent unit is suppressed from the early stage, and the life of the component in the adjacent unit and the life of the unit can be extended. In the unit direct connection type PLC system, the units adjacent to each other are directly connected to each other in a state of being in contact with each other. Therefore, the temperature in the cell is likely to rise due to the influence of the heat of the cells disposed adjacent to each other, and it is necessary to suppress the temperature rise of the cell. In the first embodiment, the target unit having a temperature value larger than a predetermined value is used. In addition to cooling, cooling of the adjacent cells is also performed, whereby the temperature rise of the adjacent cells can be suppressed.

Further, in the first embodiment, in the direct-coupled PLC system in which the units adjacent to each other are connected to each other via the bus bar connector, even if the number of units to be mounted is changed, it is possible to individually Since the unit that needs to suppress the internal temperature rise is detected and cooled, it is possible to control the temperature value in the cell with minimum necessary power consumption.

Further, in the first embodiment, in the direct-connected PLC system in which the cells arranged adjacent to each other are connected to each other via the bus bar connector, even if the number of units to be mounted is changed, it can be arbitrarily The timing is such that the internal temperature of each unit is controlled to the temperature of each unit, and the degree of freedom in controlling the internal temperature value is improved.

Therefore, according to the first embodiment, it is possible to achieve the effect of controlling the temperature value in the cell with low power consumption in a PLC system in which a CPU unit and a unit having another function are connected.

Embodiment 2.

In the first embodiment, the case where the PLC system is constituted by only the basic blocks is displayed, and in the second embodiment, the case where the PLC system is constituted by the basic blocks and the additional blocks is displayed.

Fig. 8 is a view schematically showing a configuration example of the PLC system 2 of the second embodiment. The PLC system 2 has a basic block 210 and is connected to the basic block 210 via an add-on cable (cable 230). Add block 220.

The basic block 210 includes a power supply unit 11, a CPU unit 12, target units 13-1 to 13-3, an end cover 14, and a branch unit 17. The branching unit 17 is provided when a block other than the basic block 210 is added, and is provided at an arbitrary position between the CPU unit 12 and the end cover 14. The branch unit 17 includes the temperature monitoring unit 50, the cooling control unit 60, and the cooling unit 70 described in the first embodiment. The branching unit 17 is capable of communicating with other units via a communication unit provided therein.

The add-on block 220 has an add-on unit 21 as a joint portion of a voltage supplied from the power source unit 11 to the add-on block 220 as a start end; target units 22-1 to 22-4; and an end cover 23 belonging to the end unit. All the units of the additional block 220 are connected to each other in a state in which they are adjacent to each other via a bus bar connector 16 connected to the internal bus bar 15 in each unit. The extension unit 21, the target units 22-1 to 22-4, and the end cover 23 are provided with the temperature monitoring unit 50, the cooling control unit 60, and the cooling unit 70 described in the first embodiment. The extension unit 21, the target units 22-1 to 22-4, and the end cover 23 are each capable of communicating with other units via a communication unit provided therein.

The branching unit 17 of the basic block 210 and the add-on unit 21 of the additional block 220 are connected by an extension cable 230. By the addition of the cable 230, the supply of the voltage from the power supply unit 11 of the basic block 210 to the additional block 220 and the communication between the basic block 210 and the additional block 220 can be performed via the branch unit 17. The same components as those in the first embodiment are not described. When you want to add further boxes In this case, it can be realized in the same configuration as the addition of the addition block 220. That is, a new branch unit is added to the addition block 220. Next, the branch unit and the new add-on unit are connected by an additional cable.

Next, the temperature control processing in the unit in the PLC system 2 will be described. Fig. 9 is a flowchart showing a procedure example of the temperature monitoring process of the second embodiment.

First, in step S110, when the power of the PLC system 2 is turned on, the power supply unit 11 supplies voltage to each unit of the basic block 210 via the bus bar connector 16 between the connection units. Further, the power supply unit 11 also supplies a voltage to each unit of the extension block 220 connected to the branch unit 17 via the extension cable 230. Thereby, the PLC system 2 is started. When a voltage is supplied to each unit, the unit communication unit 51 of each unit is in a state in which communication is possible.

Next, in step S120, the CPU 90 performs the following processing: accessing the basic block 210 and the additional unit 220 via the internal bus bar 15, the bus bar connector 16, and the add-on cable 230, and grasping the connection to the PLC system 2 The number of units and the number of added blocks. Next, each unit of the basic block 210 and the additional block 220 performs initial processing in accordance with the control of the CPU 90 of the CPU unit 12, and then starts the processing of each unit. Thereby, the PLC system 2 operates.

Then, after the predetermined processing of the CPU 90 ends, or at a predetermined period, or when the PLC system 2 is reset, in step S130, the target of the detection processing and the cooling processing as the internal temperature value is intermittently targeted. The object unit performs internal temperature value detection processing and cooling control deal with. The object unit is any one of the CPU unit 12 to the end cover 14 except the power supply unit 11 in the basic block 210, including the branch unit 17. Here, the case where the end cap 14 is initially used as the target unit will be described. In the case of step S130, the same processing as that of step S30 described with reference to Fig. 7 in the first embodiment is performed.

Next, after the processing of step S130 is performed for each unit of the CPU unit 12 to the end cover 14 in the basic block 210, the comparison unit 83 determines whether or not there is an additional block connected to the basic block 210 in step S140.

In step S140, when there is an additional block connected to the basic block 210, that is, YES in step S140, in step S150, the unit of the added block is used as the target unit, and the internal temperature value detection processing and cooling are performed. Control processing. The object unit here is the addition of each unit in block 220. In the case of step S150, the same processing as that of step S30 described with reference to Fig. 7 in the first embodiment is performed. Here, the case where the end cap 23 is initially used as the target unit will be described. That is, in step S150, the same processing as that of the aforementioned step S30 is sequentially performed from the end cover 23 to the extension unit 21 for the six units of the end cover 23 to the extension unit 21.

Next, after the processing of step S150 is performed on each unit of the end cover 23 to the add-on unit 21, in step S160, the comparing unit 83 determines whether or not there is an additional block, that is, whether or not there is an additional block connected to the additional block 220.

When there is an additional block in step S160, that is, YES in step S160, the unit of the additional block is used as the target unit, and the process returns to step S150. In addition, in step S160, when When there is no additional block, that is, "NO" in step S160, a series of temperature control processes are terminated.

On the other hand, in step S140, when there is no additional block connected to the basic block 210, that is, "NO" in step S140, a series of temperature control processes are ended.

In the above, the process of step S150 is sequentially performed from the end cover 23 to the extension unit 21, but the process of step S150 may be performed in the order from the extension unit 21 toward the end cover 23.

As described above, in the second embodiment, each unit of the additional block 220 is used as the target unit, and the internal temperature value detection processing and the cooling control processing are performed in the same manner as in the first embodiment. As a result, similarly to the case of the first embodiment, it is possible to monitor the temperature values inside the respective units for each unit of the additional block 220, and to perform temperature management control in each unit.

Therefore, according to the second embodiment, it is possible to achieve the effect of controlling the temperature value in the cell with low power consumption in a PLC system having a CPU unit and a unit having another function and having an additional block.

Embodiment 3.

In each of the first embodiment and the second embodiment, each of the basic block or the additional block is sequentially subjected to an internal temperature value from a cell in which the cell at the one end of the target cell is positioned toward the other end. Detection processing and cooling control processing. However, each of the basic blocks or the additional blocks may be used only as a pair of any one of the unit strings as the target unit. The image unit performs internal temperature value detection processing and cooling control processing.

At this time, it is only necessary to input the selection temperature value detection instruction information indicating that any one of the unit strings of the basic block or the additional block is the target unit to the CPU unit communication unit 81 from the outside. Further, the CPU unit communication unit 81 may previously hold the selected temperature value detection instruction information for the specific unit. The CPU unit communication unit 81 outputs only the selected unit internal temperature value detection instruction information for selecting the selected unit as the target unit to the selected unit based on the selected temperature value detection instruction information. Next, the means for obtaining the input of the temperature value detection instruction information in the selection unit and the CPU unit 12 perform the processing other than step S35 in step S30.

As a result, in the third embodiment, the detection processing and the cooling control processing of the internal temperature value of the unit can be performed only for the selected specific unit. That is, it is possible to determine whether the internal temperature value is extremely high for only a specific unit, or whether there is a need for cooling to control the temperature value in the unit.

Embodiment 4.

In the first embodiment and the second embodiment, the internal temperature of the unit is intermittently performed after the predetermined processing of the CPU 90 is completed, or at a predetermined cycle, or at the timing of resetting the PLC systems 1 and 2. The case of the value detection processing and the cooling control processing will be described. On the other hand, the processing of the above-described steps S30, S130, and S150 can be performed at any timing other than the predetermined processing of the CPU 90 or at a timing other than the timing of the predetermined period. At this time, it is only necessary to input the chase to the CPU unit communication unit 81 from the outside. The temperature value detection instruction information may be added, and the additional temperature value detection instruction information is instructed to output the added in-unit temperature value detection instruction information from the CPU unit communication unit 81. The CPU unit communication unit 81 outputs the in-unit temperature value detection instruction information based on the additional temperature value detection instruction information as described above.

Further, by inputting the additional temperature value detection instruction information as described above to the CPU unit communication unit 81 from the outside, it is possible to perform the detection of the internal temperature value again for the unit that has operated the cooling unit 70 by the series of processes described above. On the other hand, when the temperature value is lower than or equal to the predetermined value, the cooling unit 70 of the unit can be stopped by the processing of the above-described steps S36 and S37, and the cooling unit 70 of the unit adjacent to the unit can be stopped. As a result, in the fourth embodiment, the unnecessary operation of the cooling unit 70 can be eliminated, and the power consumption can be reduced.

In the above embodiments, the temperature control processing of the functional units other than the power supply unit 11 will be described as an example. However, the above-described configuration and processing may be used for all of the functional blocks including the power supply unit 11. At this time, similarly to the target units 13-1 to 13-4 and the end cover 14, the power supply unit 11 includes a temperature monitoring unit 50, a cooling control unit 60, a cooling unit 70, and a function processing unit 110. Next, the CPU unit 12 and the power supply unit 11 perform the processing described in the above embodiment, whereby the temperature control processing of the power supply unit 11 can be performed.

The above-described embodiments are merely illustrative of the contents of the present invention, and the present invention can be combined with other known techniques, and a part of the configuration can be omitted or changed without departing from the scope of the present invention.

Target unit 13-1 to 13-4‧‧

14‧‧‧End cover

15‧‧‧Internal busbar

16‧‧‧ Bus bar connector

50‧‧‧ Temperature Monitoring Department

60‧‧‧Cooling Control Department

70‧‧‧ Cooling Department

110‧‧‧Function Processing Department

Claims (14)

A programmable logic controller system, comprising: a power supply unit as a functional unit, a central calculation unit, and a general unit having a function different from the power supply unit and the central calculation unit; And the first end unit disposed at the end with respect to the power source unit is arranged adjacent to each other in abutting state, and is electrically connected and connected to be communicable via a connector connected between the functional units; The unit includes: a temperature monitoring unit that intermittently detects a temperature value in the functional unit at a predetermined timing; and a cooling unit that performs cooling in the functional unit; and the central processing unit includes the temperature monitoring unit; The cooling unit and the temperature control management unit compare the temperature value detected by the temperature monitoring unit of the functional unit of the basic block with a predetermined value that is previously set in advance corresponding to the functional unit corresponding to the basic block. According to the result of the foregoing comparison, the detection and the aforementioned prescribed value are The operation of the aforementioned cooling unit of the aforementioned functional unit in which the aforementioned temperature value is compared is controlled. The programmable logic controller system of claim 1, further comprising an additional block electrically connected to the basic block via an additional cable and connected to enable communication; Further, the basic block further includes a branching unit disposed between the power source unit and the first end unit; and in the additional block, an additional unit of the branch unit connected to the basic block via the additional cable as the functional unit The unit, the second end unit disposed at the end with respect to the extension unit, and the general unit disposed between the extension unit and the second end unit are arranged adjacent to each other in abutting state, and are arranged in advance through the foregoing The connector is electrically connected and connected to enable communication; the branch unit, the add-on unit, and the second end unit include the temperature monitoring unit and the cooling unit; and the temperature control management unit performs the function of the additional block The temperature value detected in the cell is compared with the predetermined value previously set in advance corresponding to the functional unit of the additional block, and based on the result of the comparison, the aforementioned temperature value that is compared with the predetermined value is detected. The operation of the aforementioned cooling unit of the functional unit is controlled. The programmable logic controller system according to claim 1, wherein the temperature control management unit performs the temperature at which the predetermined value is compared when the temperature value is greater than the predetermined value. The aforementioned control unit of the aforementioned functional unit operates or controls the continuous operation state. The programmable logic controller system according to claim 3, wherein the temperature control management unit performs the aforementioned functional unit that is disposed adjacent to the aforementioned functional unit that has operated the cooling unit The aforementioned cooling unit operates or controls the continuous operation state. The programmable logic controller system according to claim 2, wherein the temperature control management unit performs the temperature at which the predetermined value is compared when the temperature value is greater than the predetermined value. The aforementioned control unit of the aforementioned functional unit operates or controls the continuous operation state. The programmable logic controller system according to claim 5, wherein the temperature control management unit performs the operation of the cooling unit of the functional unit disposed adjacent to the functional unit that has operated the cooling unit Or control processing of continuous operation. The programmable logic controller system according to the first aspect of the invention, wherein the temperature control management unit performs the detection of the temperature that is compared with the predetermined value when the temperature value is equal to or less than the predetermined value. The aforementioned cooling unit of the aforementioned functional unit stops or continues to control the state of the stop state. The programmable logic controller system according to claim 7, wherein the temperature control management unit stops the cooling unit of the functional unit disposed adjacent to the functional unit that has stopped the cooling unit Or the control process of the continuous stop state. The programmable logic controller system according to the second aspect of the invention, wherein the temperature control management unit performs the detection of the temperature that is compared with the predetermined value when the temperature value is equal to or less than the predetermined value. The aforementioned cooling unit of the aforementioned functional unit stops or continues to control the state of the stop state. The programmable logic controller system according to claim 9, wherein the temperature control management unit stops the cooling unit of the functional unit disposed adjacent to the functional unit that has stopped the cooling unit Or the control process of the continuous stop state. The programmable logic controller system according to any one of claims 1 to 10, wherein the temperature monitoring unit detects a temperature value in any of the functional units instructed by the temperature control management unit. The programmable logic controller system according to any one of claims 1 to 10, wherein the temperature monitoring unit is in any timing indicated by the temperature control management unit in addition to the predetermined timing. The temperature value in the aforementioned functional unit is detected. The programmable logic controller system according to claim 1, wherein the temperature monitoring unit includes a memory unit that stores the detected temperature value. The programmable logic controller system according to claim 13, wherein the programmable logic controller system includes a display unit that displays the temperature value stored in the memory unit.