JP4562695B2 - Digital protection controller - Google Patents

Description

  The present invention relates to a digital protection control device used in a power system or the like, and an arithmetic unit having an analog input unit for taking in a voltage / current of the power system or the like, a memory storing a program, and a microprocessor for executing the program. The present invention relates to a digital protection control device having an input / output unit that outputs a control output to the outside of the protection control device, an HMI module that provides an operation display function for an operator of the protection control device, a communication I / F function, and the like.

  The conventional digital protection control device is mainly composed of an analog input unit, an arithmetic unit, and an input / output unit. The operation flow of the conventional digital protection control device is to sample the voltage / current input of the power system with the analog input unit, convert it from analog to digital, and then pass it to the arithmetic unit. After that, the control output to the external device is performed via the input / output unit according to the calculation result.

  Also, in the conventional digital protection control device, the arithmetic unit is further divided into a relay arithmetic unit, a sequence processing unit, a system control unit, a settling / display processing unit, etc. In some cases, the functions are shared every time (see Patent Document 1). In this case, the basic operation flow of the apparatus is the same.

  The analog input unit, each arithmetic unit, and the input / output unit are connected by a system bus, and data is transferred. The analog input unit and arithmetic unit, and the arithmetic unit and input / output unit are connected by dedicated serial transmission. Sometimes it is done. As a feature of connecting the analog input unit to the arithmetic unit, and between the arithmetic unit and the input / output unit by serial transmission, the design of the target unit should a failure occur in the future or the protection function is increased. The change and exchange part can be limited.

  However, if the analog input unit or input / output unit is added or changed, the H / W is usually only required to change the program even if only the relevant unit is replaced. Usually, it is necessary to change the program.

JP-A-2-223329 (FIG. 1 and its description)

  The conventional digital protection control device can change the built-in program along with the addition / change of the corresponding H / W when it is necessary to increase the analog input, input / output, communication, etc. due to the equipment change or expansion of the power system. In general, such a change of the built-in program is a special work, and is often performed by the manufacturer of the digital protection control device. There is a problem that it takes a long time to respond to equipment change or expansion of the power system, such as a function test as a protection control device.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a digital protection control device that can rationalize the work to cope with the addition or change of H / W of the digital protection control device. Is.

The digital protection control device according to the present invention includes an analog input unit that takes in an analog input and converts it into digital data, a calculation unit that performs a predetermined protection control calculation based on data passed from the analog input unit, and the calculation unit In a digital protection control device having an input / output unit for performing control output according to the determined calculation result , device side storage means provided on the device side in which identification information of H / W that can be added is stored in advance, H / W-side storage means that is provided on the / W side and stores unique information of the H / W, identification information of the H / W that can be added stored in the apparatus-side storage means, and the added H / W wherein by comparing the unique information stored in the H / W side storage unit, provided with a determination means for determining expansion possibility of the expansion H / W, the determination result in the determination means is expanded Friendly The case is added can be H / W corresponding program execution, when the determination result by the determination unit was not added, is to alarm output.

According to the present invention, an analog input unit that takes in an analog input and converts it into digital data, a calculation unit that performs a predetermined protection control calculation based on data transferred from the analog input unit, and a calculation result determined by the calculation unit In a digital protection control device having an input / output unit for performing control output, H / W identification information that is provided on the device side and that can be expanded is stored in advance , and is provided on the H / W side that is additionally installed. H / W side storage means for storing the specific information of the H / W, identification information of the H / W that can be added stored in the apparatus side storage means, and the H / W side of the added H / W A determination unit that compares the unique information stored in the storage unit and determines whether or not the additional H / W can be added is provided . If the determination result by the determination unit indicates that the extension can be added, the additional H / W correspondence Program is executed, if the determination result by the determination unit was not added, because the alarm output, it is possible to streamline the corresponding work in the expansion or change of H / W of the digital protective control apparatus, facilitating corresponding work There is an effect to become.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing an example of the overall configuration of the digital protection control device, FIG. 2 is a diagram showing an example of an initialization operation flowchart as a part of the operation description of FIG. 1, and FIG. 3 is a part of the operation description of FIG. FIG. 4 is a diagram showing an example of an operation flowchart of protection control calculation processing which is a part of the operation description of FIG. 1.

  In FIG. 1, the analog input of the power system is sampled and analog / digital converted by an analog input card 21 that is an analog input unit in the main unit 2, and is transferred to a calculation card 22 that is a calculation unit.

  The arithmetic card 22 performs a protection control calculation, and based on the result, a control output Om is output via the input / output card 23 which is an input / output unit.

  A series of operations from data acquisition by the analog input card 21 to protection control calculation by the calculation card 22 and control output by the input / output card 23 are stored in the program storage memory 224 in the calculation card 22 in advance. It is executed by the microprocessor 222 in the arithmetic card 22 based on the program.

  Similarly, an HMI process for performing a display operation related to an operator of the digital protection control apparatus 1 and an automatic monitoring process for determining the presence / absence of a defect with respect to the digital protection control apparatus 1 are also included in the program stored in the program storage memory 224. Based on this, the microprocessor 222 executes.

  On the other hand, when it is necessary to add or change the H / W of the digital protection control device 1 due to the addition or change of the power system equipment, one or a plurality of extension-compatible input / output cards 26 are added or changed as necessary. If it is changed or the expansion scale is large, one or a plurality of additional IO units 3 are added.

  In the digital protection control device 1 or the main unit 2, an empty space equivalent to the extension compatible H / W is prepared in advance for the addition of the extension input / output card 26... And the extension IO unit 3. Have it ready.

  At the time of the above expansion, the digital protection control device 1 that is in operation is stopped (power OFF), and after the addition-compatible I / O card 26 or expansion IO unit 3 is added, the digital protection control device is started again (power ON). As a result, the H / W that can be added, which is set in advance in the extension compatible H / W registration table in the setting data storage memory 225, which is the device side storage means in the arithmetic card 22, and the expansion compatible input / output card 26 or 32. The H / W specification recognition information storage circuit 261 or 321 stored in the H / W side storage means of the H / W specification is compared with the H / W specification recognition information, and the consistency of the additional I / O card 26 or 32 Similarly, the set value and program related to the current corresponding set value and programmable logic sequence stored in the setting data storage memory 225 and the expansion compatible input / output card 26 or 32 By recognizing and verifying the added H / W automatically by performing a consistency check with a functional logic sequence, without changing the program stored in the memory 224 in the computation card 22, The expansion / change can be completed.

  Further, if it is determined that the current set value or programmable logic sequence needs to be changed as a result of the consistency check, an alarm output O1 is output to the outside via the input / output card 23, and an HMI (human machine Interface) The presence / absence and contents of the change are displayed using the display lamp 242 and the display 241 via the module 24 to prompt the operator to change the set value or the programmable logic sequence.

  Also, the H / W that can be added in advance in the H / W registration table for expansion in the setting data storage memory 225 does not match the H / W specification recognition information in the I / O card for expansion that has been recognized as described above. In this case, the added H / W is regarded as an error or failure, and the contents of the alarm output and inconsistency are similarly displayed via the HMI module 24.

  Next, the operation of the digital protection control device 1 illustrated in FIG. 1 will be described with reference to FIGS.

  In FIG. 2, the initialization process starts when the power supply of the digital protection control device is turned on.

  First, in step ST11, standard H / W initialization in the main unit 2 is executed. More specifically, initialization of the memories 224 and 225 and standard H / W (21, 221, 223, 23, 24, etc.) initialization are performed.

  In step ST12, the expansion support H / W registration table in the setting data storage memory 225 is read, and if the expansion support H / W is registered in step ST13, the system bus 27 or serial is registered in step ST14. The H / W specification recognition information is read out from the H / W specification recognition information storage circuit 261 or 321 in the corresponding expansion compatible input / output card 26 or 32 via the transmission / reception cards 25 and 31.

  When a plurality of H / Ws that can be added are registered in the extension-compatible H / W registration table, the operations in steps ST12 to ST14 are repeated.

  The H / W specification recognition information includes the identification number of the expansion compatible input / output card 26 or 31, the number of input / output channels mounted on the expansion input / output card, the input / output channel attributes, and the like. It is information that can be recognized.

  If the specification recognition information read in step ST15 matches the contents of the expansion H / W registration table in the setting data storage memory 225, in step ST16, “there is an expansion H / W available” In step ST17, the expansion compatible input / output card 26 or 32 is initialized.

When a plurality of H / Ws that can be added are registered in the extension compatible H / W registration table, the same initialization is repeated.
When the initialization operation is completed, the initialization process ends normally.

  Here, in the extension compatible H / W registration table, for example, immediately before the digital protection control device 1 is added (before the power is turned off), the HMI module 24 sets the H / W corresponding to the extension in advance by the operator. By setting and registering, the above operation can be executed after the H / W expansion work, that is, the addition-compatible input / output cards 26 and 32 are added.

  On the other hand, if the expansion support H / W is not registered in step ST13, steps ST14 to ST16 are not performed, and the initialization process ends normally.

  In step ST15, if there is a discrepancy between the read H / W specification recognition information and a part of the contents of the expansion compatible H / W registration table, or the expansion compatible input / output card 26 or 32 is not mounted or has failed. If the H / W specification recognition information cannot be read correctly, the initialization is abnormally terminated.

  Further, upon completion of the initialization, a periodic interrupt is generated and the periodic processing (see FIG. 3) starts.

  In FIG. 3, first, in step ST21, it is checked whether or not the H / W initialization has been normally completed. If normal, it is checked in step ST22 whether there is an expansion compatible H / W and an expansion compatible H / W. If there is, the consistency between the H / W specification recognition information read in step ST14 and the current set value stored in the setting data storage memory 225 or the logic sequence data programmable by the operator in step ST23 Check.

Logic sequence data that can be programmed by the operator can be stored in the setting data storage memory 225 via the HMI module 24 in advance.
The storing process is performed in step ST28.

  The consistency check between the current set value and the H / W specification recognition information can be performed by, for example, matching the number of input / output channels used in the digital protection control device.

  The consistency check of logic sequence data programmable by the operator can be performed by matching the attributes of input / output channels in the logic sequence data.

  As a result, when the set value and the consistency check of the logic sequence data programmable by the operator match, in step ST24, the H / W expansion is completed and the process proceeds to step ST25.

  In step ST25, analog input processing such as filter processing and analog input conversion processing is performed.

  In step ST26, protection control calculation processing is performed based on the analog input data generated in step ST25. Details of the protection control calculation process in step ST26 are shown in step ST261 to step ST263 in FIG.

  In FIG. 4, step ST261 performs standard protection control calculation processing irrespective of the presence / absence of the extension compatible H / W.

  Step ST262 is a determination for executing the additional H / W compatible protection control calculation process in step ST263 when the H / W expansion is completed in step ST24.

  Therefore, when the expansion compatible input / output card is not added or when the H / W initialization is normally completed, step ST263 is not executed.

  Next, returning to FIG. 3, in step ST27, input / output processing is performed, and control output is performed via the input / output card 23 or the expansion-compatible input / output card 26 or 32 based on the determination result of the protection control arithmetic processing. . In the input / output process, control inputs necessary for logical operations are also taken.

  In step ST28, in addition, operations such as settling, setting, and testing related to the digital protection control device 1, operations, operations such as abnormalities, and display processing such as protection control determination results are performed in general.

Finally, in step ST29, H / W soundness and S / W normal operation according to the H / W configuration of the digital protection control device are constantly monitored.
If any abnormality is found in this monitoring, an alarm output is issued via the input / output card 23.
Further, the contents of the abnormality are displayed on the display 241 and the display lamp 242 in the HMI module 24 through the HMI processing.

  On the other hand, if the set value and logic sequence data that can be programmed by the operator do not match at step ST23, it is necessary to change the setting or programmable logic sequence data by the operator. Not executed.

  Furthermore, in the HMI processing of step ST28, the H / W expansion is inconsistent with the display 241 and display lamp 242 in the HMI module 24, and the contents (inconsistency in the number of input / output channels, etc. To indicate to the operator that setting changes or programmable logic sequence data changes are required.

If it is determined in step ST22 that there is no additional hardware H / W, steps ST23 and ST24 are not executed.
Further, if the H / W initialization is not normally completed in step ST21, steps ST22 to ST28 are not executed.

  In this embodiment, in step ST261 to step ST263, only the protection control calculation process is controlled before and after the addition of the expansion-compatible input / output card. However, step ST25, step ST27, step ST28 are controlled. The other processes in step ST29 can be similarly controlled according to the presence / absence of the expansion-compatible input / output card.

  As described above, in the digital protection control device 1 according to the first embodiment of the present invention, the program storage memory 224 stores a program corresponding to the expansion H / W in advance, and the setting data storage memory 225 can expand the H / W that can be expanded. Registration information, set values, and logic sequence data that can be programmed by the operator are stored, H / W specification recognition information is stored in the I / O card 26 or 32 for expansion, and the contents are read after the power is turned on. By performing a consistency check, it is possible to add H / W without having to make complicated program changes, and if it is not necessary to change the program, the function test of the digital protection control device can be omitted. The effect of being able to do it is also born. That is, only the confirmation that the added automatic monitoring of the H / W is normal and the representative confirmation of only the changed function can be performed, and the overall function test related to the corresponding program can be omitted. Furthermore, even if the setting value or logic sequence data that can be programmed by the operator needs to be changed, it is not a special task of changing the program, but an operation that is relatively easy for the operator to operate by operating the HMI module. There is also an advantage that it is possible.

Embodiment 2. FIG.
In the first embodiment, when the extension compatible H / W initialization is not normally completed, as shown in step ST21 of FIG. 3, normal protection control calculation processing and input / output processing are not performed in S / W. Thus, in the second embodiment, an AND circuit 231 as shown in FIG. 5, that is, initialization normal termination is completed in the input / output card or the expansion-compatible input / output card. By configuring the AND circuit 231 that takes the AND of the condition signal and the original signal of the control output, it is locked in H / W so that the control output is not output unless the initialization ends normally. is there.

  In this way, in addition to the effect of the first embodiment of the present invention described above, there is an effect that the control output can be reliably prevented from being erroneously output. If only the control output is locked and protection control calculation processing, input / output processing, and HMI processing are to be executed, the process proceeds to step ST28 when the normal end of H / W initialization is not determined in step ST21. Instead, it can be realized by moving to step ST25.

Embodiment 3 FIG.
In the above-described first embodiment of the present invention, the H / W specification recognition information is stored for each expansion-compatible input / output card. However, in this third embodiment, as shown in FIG. -H / W specification recognition information is stored in units. The expansion compatible H / W applies to analog input cards in addition to input / output cards, but the operation is the same as that shown in FIGS. 2 to 4 and is the same as that of the first embodiment of the present invention described above. There is an effect.

Embodiment 4 FIG.
In the fourth embodiment, instead of storing the expansion H / W compatible program in the program storage memory in the arithmetic card in advance in the first embodiment of the present invention, the expansion compatible H / W side is dedicated to expansion support. The program is stored. FIG. 7 shows the configuration of the fourth embodiment.

  In FIG. 7, the analog input of the power system is sampled by the analog input card 21 in the main unit 2, converted from analog to digital, and transferred to the arithmetic card 22.

  In the arithmetic card 22, protection control arithmetic is performed, and control output is performed via the input / output card 23 based on the result. A series of operations from data acquisition from the analog input card to protection control calculation and control output via the input / output card is performed by the microprocessor 222 based on a program stored in the common program storage memory 224 in the calculation card 22 in advance. Executed. Similarly, an HMI process for performing a display operation related to an operator of the protection control apparatus, an automatic monitoring process for determining the presence / absence of a defect related to the protection control apparatus, and the like are also performed based on the program in the common program storage memory 224. It is executed by the processor 222.

  On the other hand, when a new function addition of the digital protection control device 1, for example, addition of a communication I / F function or the like requires H / W expansion or change, an expansion compatible communication I / F card is required. When one or a plurality of 28 are added or changed, or when the expansion scale is large, one or a plurality of additional communication units 6 are added.

  The digital protection control device 1 or main unit 2 is provided with an empty space equivalent to an expansion compatible H / W for the addition of the expansion communication I / F card 28 and the expansion communication unit 6. Prepare in advance.

  At the time of the above expansion, stop the digital protection control device 1 that is in operation (power OFF), add the expansion compatible communication I / F card 28 or expansion communication unit 6, and then start the digital protection control device again (power ON ) To check the H / W specification recognition information stored in the communication I / F dedicated program storage memories 281 and 621 in the expansion compatible communication I / F cards 28 and 62, and to set the H that can be expanded in advance. After recognizing the added H / W automatically by checking the current setting value and programmable logic sequence stored in the setting data storage memory 225 in the same way as the / W registration table. By reading and executing the communication I / F dedicated program stored in the communication I / F dedicated program storage memories 281 and 621 in the expansion compatible communication I / F cards 28 and 62, the computation card Without changing the program stored in the common program storage memory 224 de 22, it is to be able to complete the expansion and change.

  Furthermore, if it is determined as a result of the consistency check that the current set value or programmable logic sequence needs to be changed, an alarm is output to the outside via the I / O card 23 and an HMI (Human Machine Interface) The presence / absence and contents of the change are displayed using the display lamp 242 and the display 241 via the module 24, and the operator is prompted to change the set value or the programmable logic sequence. If the preset registration table that can be expanded and the H / W specification recognition information in the expansion compatible communication I / F card recognized as described above are inconsistent, the added H / W is regarded as an error or failure. Similarly, the contents of the alarm output and inconsistency are displayed via the HMI module 24.

  Next, the operation of the digital protection control device 1 of FIG. 7 will be described with reference to FIGS.

  In FIG. 8, the initialization process starts when the power supply of the digital protection control device is turned on.

  First, in step ST11, standard H / W initialization in the main unit 2 is executed. Specifically, initialization of the memories 224, 225, 226, standard H / W (21, 221, 223, 23, 24, etc.) initial setting and the like are performed.

  In step ST12, the expansion support H / W registration table in the setting data storage memory 225 is read. If the expansion support H / W is registered in step ST13, the system bus 27 or serial transmission is performed in step ST14. The H / W specification recognition information is read from the communication I / F dedicated program storage memory 281 or 621 in the corresponding expansion compatible communication I / F card 28 or 62 via the transmission / reception cards 25 and 61.

  When a plurality of predicted expansion H / Ws are registered in preparation for expansion in the increase / expansion compatible H / W registration table, the operations in steps ST12 to ST14 are repeated.

  The H / W specification recognition information is the identification number of the expansion compatible communication I / F card 28 or 62, the number of communication I / F channels mounted on the expansion compatible communication I / F card, and the communication I / F. Attribute.

  If the H / W specification recognition information read in step ST15 matches the contents of the expansion H / W registration table in the setting data storage memory 225, in step ST16, the “expansion H / W W ”is determined, and the communication I / F dedicated program stored in the communication I / F dedicated program storage memory 281 or 621 in the corresponding expansion compatible communication I / F card 28 or 62 is read and calculated in step ST167. Transfer to the program load memory 226 in the card 22.

  In step ST17, the communication I / F dedicated program in the program load memory 226 is executed, and the expansion compatible communication I / F card 28 or 62 is initialized.

If a plurality of expected expansion H / Ws are registered in preparation for expansion in the expansion compatible H / W registration table, step ST167 and step ST17 are repeated for the amount registered.
When the initialization operation is completed, the initialization process ends normally.

  Here, in the extension compatible H / W registration table, for example, immediately before the digital protection control device 1 is added (before the power is turned off), the HMI module 24 sets the H / W corresponding to the extension in advance by the operator. By setting and registering, the H / W expansion work, that is, the above-described operation can be executed after the addition-compatible input / output cards 28 and 62 are added.

  On the other hand, if the expansion support H / W is not registered in step ST13, steps ST14 to ST18 are not performed, and the initialization process ends normally.

  In step ST15, if there is a discrepancy between the read H / W specification recognition information and a part of the contents of the expansion compatible H / W registration table, or the expansion compatible communication I / F cards 28 and 62 are not mounted or If the H / W specification recognition information cannot be read correctly due to a failure, the initialization is terminated abnormally.

  Further, upon completion of the initialization, a periodic interrupt is generated, and the periodic processing (see FIG. 9) starts.

  In FIG. 9, first, in step ST21, it is checked whether or not the H / W initialization has been completed normally. If it is completed normally, in step ST22, it is checked whether there is an expansion H / W. If yes, in step ST23, the H / W specification recognition information read in step ST14 and the current set value stored in the setting data storage memory 225 and the consistency of logic sequence data programmable by the operator are checked. To check.

Logic sequence data that can be programmed by the operator can be stored in the setting data storage memory 225 via the HMI module 24 in advance.
The storage process is performed in step ST29.

  The consistency check between the current set value and the H / W specification recognition information can be performed by, for example, matching the number of communication I / F channels used in the digital protection control device.

  The consistency check of the logic sequence data programmable by the operator can be performed by matching the communication I / F in the logic sequence data programmable by the operator with the address of the data to be delivered.

  As a result, when the set value matches the consistency check of the logic sequence data programmable by the operator, the H / W addition is completed in step ST24, and the process proceeds to step ST25.

  In step ST25, analog input processing such as filter processing and analog input conversion processing is performed.

  In step ST26, protection control calculation processing is performed based on the analog input data generated in step ST25.

  In step ST27, input / output processing is performed, and control output is performed via the input / output card 23 based on the determination result of the protection control arithmetic processing. In the input / output process, control inputs necessary for logical operations are also taken.

Next, in step ST278, communication processing is performed.
Here, the details of the communication processing are shown in FIG. 10 in steps ST2781 to ST2783.

  In FIG. 10, step ST2781 performs standard communication processing irrespective of the presence / absence of expansion compatible H / W.

Step ST2782 is a determination for executing the additional H / W compatible program transferred to the program load memory 226 in the calculation card 22 in step ST2783 when the H / W expansion is completed in step ST24.
Therefore, when the expansion compatible communication I / F card is not added, or when the H / W initialization is normally completed, step ST2783 is not executed.

  Next, returning to FIG. 9, in step ST28, in addition, display processing such as settling, setting, testing, and other operations and operations relating to the digital protection control device 1, abnormal states, protection control determination results, etc. are performed.

Finally, in step ST29, the soundness of the H / W corresponding to the H / W configuration of the digital protection control device and the normal operation of the S / W are constantly monitored.
If any abnormality is found in this monitoring, an alarm output is issued via the input / output card 23.

  Further, the contents of the abnormality are displayed on the display 241 and the display lamp 242 in the HMI module 24 through the HMI processing.

  On the other hand, if the set value and logic sequence data that can be programmed by the operator do not match at step ST23, it is necessary to change the setting or programmable logic sequence data by the operator. Not executed.

  Further, in the HMI processing in step ST28, the display 241 and the display lamp 242 in the HMI module 24 are inconsistent with the addition of H / W and the contents (the communication I / F channel number mismatch and the communication I / F). Display address, etc.) to indicate to the operator that settling or programmable logic sequence data needs to be changed.

  If it is determined in step ST22 that there is no additional hardware H / W, steps ST23 and ST24 are not executed.

  Further, if the H / W initialization is not normally completed in step ST21, steps ST22 to ST28 are not executed.

  In the present embodiment, only the communication process is controlled in steps ST2781 to ST2783 before and after the addition-compatible communication I / F card is added. However, steps ST25, ST27, and ST278 are performed. The other contents of step ST28 can be similarly controlled in accordance with the presence / absence of the expansion compatible communication I / F card.

  As described above, in the digital protection control device 1 of the fourth embodiment, the setting data storage memory 225 stores the H / W registration information that can be added, the set value, and the logic sequence data that can be programmed by the operator. The H / W specification recognition information is stored in the expansion compatible communication I / F card 28 or 62, the contents are read after the power is turned on, the consistency check is performed, and the expansion compatible communication I / F By transferring the communication I / F dedicated program stored in the card to the program loading memory 226 in the arithmetic card 22 and executing it, the standard program stored in the common program storage memory can be changed without complicated changes. / W can be added, and the same effect as in the first embodiment is obtained. In addition, when adding a function whose specifications are uncertain at the beginning of operation of the digital protection device, such as a communication function, the function can be easily expanded without changing the originally stored program at the expansion stage. The effect that can be produced.

  1 to 10, the same reference numerals indicate the same or corresponding parts, and in the above-described second to fourth embodiments, the same or corresponding parts as those in the first embodiment are in principle. The explanation is omitted, and the differences are mainly explained.

  Here, the above-described first to fourth embodiments of the present invention have the following characteristic points.

  The program storage memory 224 stores an expansion H / W compatible program in advance, and the setting data storage memory 225 stores H / W registration information that can be expanded, a set value, and logic sequence data that can be programmed by the operator. H / W specification recognition information is stored in expansion compatible H / W 3 and 26, the contents are read after power-on, and consistency check is performed, so that H / W expansion can be performed without changing the program. Is possible.

  Further, instead of storing the expansion H / W compatible program in the program storage memory 224 in advance, the expansion H / W compatible program is stored on the expansion compatible H / W 3, 26 side.

  Further, the analog input unit 21 that takes in voltage and current analog inputs and converts them into digital data, the calculation unit 22 that performs a predetermined protection control calculation based on the data passed from the analog input unit, and the calculation unit In the digital protection control device 1 having the input / output unit 23 for performing control output according to the calculation result, means 225 for storing the H / W registration information for expansion and means 261 for storing the H / W specification for expansion. 321 is a digital protection control device provided with 321.

  Further, the H / W registration information stored in the means 225 for storing the H / W registration information corresponding to the expansion and the H / W specifications stored in the means 261 and 321 for storing the H / W specifications corresponding to the expansion. The digital protection control apparatus is characterized by comprising means 222 for executing a pre-stored extension compatible program only when the recognition information and the like are checked at initialization and matched.

  Further, the digital protection is provided with means for storing the expansion correspondence program stored in advance in the expanded H / W 3, 26 and transferring it to the executable memory area 224 for initialization. It is a control device.

  Further, the apparatus includes setting value storage means 225 for storing a set value and sequence logic programmable by an operator. The set value stored in the setting value storage means 225, the programmable sequence logic, and an H / It is provided with means 222 for checking the H / W specification recognition information stored in the means 261 and 321 for storing the H / W specifications of W3 and 26, and executing the expansion compatible program only when the contents match. A digital protection control device characterized by the above.

  Also, the H / W registration information stored in the means 225 for storing the H / W registration information for expansion and the H / W specification recognition information stored in the means 261 and 321 for storing the H / W specifications for expansion. The digital protection control device is provided with means O1 for outputting a warning to the outside when the above are checked at initialization and if they do not match.

  In addition, the digital protection control device is characterized by including display means 241 for displaying the contents of inconsistency to the operator.

  Further, the set value storage means 225 for storing the set value and the sequence logic programmable by the operator, the set value stored in the set value storage means 225, the programmable sequence logic, and the H / W 3 for expansion , 26 for storing the specifications of the H / W specification recognition information stored in the means 261, 321 and if the contents do not match, display means 241 for displaying the contents of the mismatch to the operator. A digital protection control device comprising:

  In addition, the digital protection control device is provided with means 231 for locking the control output Om while the inconsistency state continues.

  Further, an analog input unit 21 that takes in an analog input and converts it into digital data, a calculation unit 22 that performs a predetermined protection control calculation based on data transferred from the analog input unit, and a calculation result determined by the calculation unit In the digital protection control device 1 having the input / output unit 23 for performing control output, device side storage means 225 provided on the device side for storing H / W identification information that can be added, and the H / W 3, 26 side to be added H / W-side storage means 261, 321 for storing the specific information of the H / W, the identification information of the H / W that can be added stored in the apparatus-side storage means, and the added H / W And a determination means 222 for comparing the unique information stored in the H / W-side storage means to determine whether or not the additional H / W can be added. It is a protection control unit.

  The digital protection control apparatus is characterized in that when the determination result by the determination means 222 is expandable, an expandable H / W compatible program is executed.

  The digital protection control apparatus is characterized in that a program corresponding to the H / W 3, 26 that can be added is stored on the apparatus side.

  The digital protection control apparatus, wherein the H / W 3,26-compatible program is stored on the additional H / W side.

  Further, the digital protection characterized in that the H / W compatible program stored on the H / W 3, 26 side to be added is executed after being transferred to the device side and stored on the device side. It is a control device.

  Further, the unique information stored on the H / W 3, 26 side to be added is at least one information of the H / W specification, set value, and programmable sequence logic. It is a protection control device.

  Further, in the digital protection control device, when the determination result by the determination means 222 is an extension failure, an alarm output O1 is performed.

  In addition, when the determination result by the determination unit 222 indicates that the expansion is not permitted, the digital protection control device displays the contents of the expansion rejection.

  Further, the digital protection control device is characterized in that the control output Om is locked when the expansion is not allowed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Embodiment 1 of this invention, and is a block diagram which shows the example of the whole structure of a digital protection control apparatus. It is a figure which shows Embodiment 1 of this invention, and is a figure which shows the example of the operation | movement of the initialization which is a part of operation | movement description of FIG. 1 with a flowchart. It is a figure which shows Embodiment 1 of this invention, and is a figure which shows the example of the operation | movement of the fixed period process which is a part of operation | movement description of FIG. It is a figure which shows Embodiment 1 of this invention, and is a figure which shows the example of the operation | movement of the protection control arithmetic processing which is a part of operation | movement description of FIG. 1 with a flowchart. It is a figure which shows Embodiment 2 of this invention, and is a logic circuit which shows the example of the lock function of a control output. It is a figure which shows Embodiment 3 of this invention, and is a block diagram which shows the other example of the whole structure of a digital protection control apparatus. It is a figure which shows Embodiment 4 of this invention, and is a block diagram which shows the further another example of the whole structure of a digital protection control apparatus. It is a figure which shows Embodiment 4 of this invention, and is a figure which shows the example of the operation | movement of the initialization which is a part of operation | movement description of FIG. 7 with a flowchart. It is a figure which shows Embodiment 4 of this invention, and is a figure which shows the example of the operation | movement of the fixed period process which is a part of operation | movement description of FIG. 7 with a flowchart. It is a figure which shows Embodiment 4 of this invention, and is a figure which shows the example of the operation | movement of the communication process which is a part of operation | movement description of FIG. 7 with a flowchart.

Explanation of symbols

1 Digital protection control device 2 Main unit
3 expansion IO unit, 4 serial bus,
5 Extension unit, 6 Extension communication unit,
21 analog input card, 22 computation card,
23 I / O card, 24 HMI module,
25 serial transmission / reception card, 26 I / O card for expansion,
28 communication interface card for expansion, 31 serial transmission / reception card,
32 I / O card for expansion, 51 Serial transmission / reception card,
52 analog input card, 53 input / output card,
54 H / W specification recognition information storage storage circuit,
61 serial transmission / reception card, 62 expansion compatible communication I / F card,
221 I / F circuit, 222 microprocessor,
223 I / F circuit, 224 program storage memory,
225 Setting data storage memory (device side storage means),
226 memory for program loading,
231 AND circuit, 241 display,
242 indicator lamp, 243 operation switch,
261 H / W specification recognition information storage circuit (H / W side storage means),
281 Communication I / F dedicated program storage memory,
321 H / W specification recognition information storage circuit (H / W side storage means),
621 Program I / F dedicated program storage memory.

Claims (7)

An analog input unit that takes in an analog input and converts it to digital data, a calculation unit that performs a predetermined protection control calculation based on data passed from the analog input unit, and a control output based on the calculation result determined by the calculation unit In a digital protection control device having an input / output unit,
Device-side storage means that is provided on the device side and stores H / W identification information that can be added in advance ,
H / W-side storage means for storing the specific information of the H / W provided on the additional H / W side,
Further, the H / W identification information that can be added stored in the device-side storage means and the unique information stored in the H / W-side storage means of the added H / W are compared, and the extension Judgment means for judging whether or not to add H / W
Equipped with a,
If the determination result by the determination means is expandable, an expandable H / W compatible program is executed,
A digital protection control device , wherein an alarm is output when the result of determination by the determination means is an extension failure. 2. The digital protection control device according to claim 1 , wherein the H / W compatible program which can be added is stored on the device side. 2. The digital protection control device according to claim 1 , wherein the H / W-compatible program that can be added is stored on the H / W side to be added. 2. The digital protection control device according to claim 1 , wherein the addable H / W compatible program stored on the H / W side to be added is transferred to the device side and stored on the device side. A digital protection control device. In the digital protective control apparatus according to any one of claims 1 to 4, wherein the unique information stored in the H / W side to be added is, the specification of the H / W, set point, and a programmable A digital protection control device characterized in that it is at least one piece of information of a correct sequence logic. In the digital protective control apparatus according to any one of claims 1 to 5, when the determination result by the determination unit was not added, the digital protective control and displaying the contents of whether the extension apparatus. In the digital protective control apparatus according to any one of claims 1 to 6, when in the state of not the additional digital protective control apparatus, characterized by locking the control output.

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