JPH11110001A - Remote system equipped with slave device recognition function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the remote system which is able to reduce the possibility that malfunction occurs and can be constituted at low cost. SOLUTION: This system consists of one master device 10 and slave devices 1021 to 102n which are remotely controlled by the master device 101. In this case, the slave devices are equipped with ID sending-out means 1031 to 103 , which send out IDs indicating their stations for a prescribed time at the time of resetting and the master device 101 is equipped with an ID confirming means 104 which confirms reception contents when communicating with the slave devices; when the reception contents are an ID, it is read to recognize the slave device as a communication partener and when the reception contents are normal data used for ordinary processing operation, the ordinary processing operation is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a remote system comprising one master device and at least one slave device remotely controlled by the master device.

[0002]

2. Description of the Related Art In a remote system including one master device and at least one slave device remotely controlled by the master device, the master device is not provided with means for confirming a connected slave device. The control has been performed on the assumption that a slave device which is set in advance as a control target is connected to itself.

FIG. 5 is a block diagram showing a configuration of a conventional example. N slave devices 4 for the master device 401
_{02 1, 402 2, ...,} 402 n are provided. The master device 401 is realized by a very general computer system including a storage device, a control device, an input device, and an output device (both not shown), and the storage device includes slave devices 402 _{1 to} 402 ₁ . _n , and information indicating the configuration of each slave device 40 are stored in accordance with the control program.
21 _{1 to} 402 _n are controlled. Since the master device 401 has no means for confirming the connected slave device, the control operation is performed _assuming that the intended slave devices 402 _{1 to} 402 _n are connected when the system is started. , Each slave device 402 _1-
402 the slave devices from the existence and content of the returned come signals from _{n 402} 1 to 402 _n had confirmed that it is connected.

[0004]

In the conventional remote system described above, the master device performs a control operation when the system is started, assuming that the intended slave device is connected, and as a result, the master device is returned from the slave device. Because it is a configuration that confirms that the intended slave device is connected based on the presence and content of the incoming signal and the content, if the intended slave device is not mounted, or a slave device different from the intended slave device is mounted In such a case, there is a problem that there is a risk of malfunction. Further, after the system is started, the power of only some of the slave devices may be turned off for maintenance or the like.
When the power is turned off on the slave device side, communication with the master device is interrupted, so the master device can confirm that the slave device has been disconnected, but the subsequent power-on causes the same problem as when the system starts up. for,
After the system is started, the power of the slave device is controlled to be turned off and on by the control of the master device. For this reason, there is a problem that the device configuration becomes complicated and the system becomes expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has been made in consideration of the above-described problems, and provides a remote system that can reduce the risk of malfunction and can be configured at low cost. It is intended to be realized.

[0006]

According to the present invention, there is provided a remote system having a function of recognizing a slave device, the remote system comprising one master device and at least one slave device remotely controlled by the master device. Wherein the slave device includes ID sending means for sending an ID indicating its own station for a predetermined time upon reset, and the master device includes ID recognition means for confirming the received content when communicating with the slave device; Is I
In the case of D, this is read and the slave device of the communication partner is recognized, and when the received content is the normal data used for the normal processing operation, the normal processing operation is performed.

A remote system having a slave device recognition function according to another aspect of the present invention is a remote system including one master device and at least one slave device remotely controlled by the master device. The slave device includes an elapsed time detecting unit that detects whether a predetermined time has elapsed from a reset time,
Register, a data register for storing normal data, and an output of the ID register to the master device when the elapsed time detecting means detects that a predetermined time has elapsed since reset. Send out,
Selection output means for sending the output of the data register to a master device when the passage of the predetermined time from the reset time is not detected by the elapsed time detection means, the master device comprising: An ID recognizing means for confirming the received content at the time of communication is provided. If the received content is an ID, the ID is read to recognize the slave device of the communication partner, and the received content is used as normal data used for normal processing operation. In the case of, a normal processing operation is performed.

[Operation] In the present invention configured as described above, the slave device transmits an ID indicating its own station until a predetermined time elapses at the time of reset, so that the master device determines which slave device is performing communication. Can be recognized.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation thereof. The master device 101 is provided with n slave devices 102 ₁ , 102 ₂ ,..., 102 _n . The master device 101 is realized by a very general computer system including a storage device, a control device, an input device, and an output device (both not shown), and the storage device includes slave devices 102 ₁ to 102 ₁ . Information indicating the configuration of the device 102 _n and their control programs are stored, and the control device controls each of the slave devices 102 _{1 to} 102 _n according to the control program. Each of the slave devices 102 _{1 to} 102 _{n according to} the present embodiment is provided with ID transmitting means 103 _{1 to} 103 _{n for} transmitting the ID of the own station for a certain period of time when the system is started and when the power is reset. Are the ID sending means 103 _1-
ID recognition means 104 for receiving the ID from 103 _n are provided.

[0011] FIG. 2 (a) is a flowchart showing the operation of the master device 101, FIG. 2 (b) is a flowchart showing the operation of the slave devices ₁₀₂ 1 to 102 _n. First, the operation of the master device 101 is shown in FIG.
This will be described with reference to FIG. The master device 101
Is connected to a plurality of slave devices as described above, and the master device 101 is configured to control each slave device via a port to which each slave device is connected.

When a device operation is started by a reset (including a power-on reset at power-on), an initial process such as loading of a program is first performed (step S201), and thereafter, a reception operation is normally performed. It is confirmed whether or not it has been performed (step S202). If the receiving operation is not normal, the process for the slave station is terminated, and the process for confirming the next station is performed (step S206), and the process returns to step S202 to perform the process for the next station. If it is confirmed in step S202 that the receiving operation is performed normally, the content of the data performing the receiving operation is confirmed (step S20).
3). If the data performing the receiving operation is an ID, the ID is confirmed and the type of the connected slave device is confirmed. Then, after performing the confirmation process for the next station (step S206), the process returns to step S202 to perform the process for the next station. Step S203
If it is confirmed that the data performing the receiving operation is normal data, normal data processing is performed (step S204). Then, after performing a confirmation process for the next station (step S206), step S20 is performed.
Returning to step 2, processing for the next station is performed.

Next, the operation of the slave devices 102 _{1 to} 102 _n will be described with reference to the flowchart of FIG. When the operation of the apparatus is started, first, initial processing such as loading of a program is performed (Step S).
207) Then, the ID is transmitted (Step S)
208). Thereafter, it is confirmed whether a predetermined time has elapsed from the start of the operation of the apparatus (step S209). If the predetermined time has elapsed, the process is switched to a normal communication process (step S210). Returning to S208, the operation of transmitting the ID is continuously performed.

In the present embodiment in which the above operation is performed, the master device 101 is connected to each slave device 102 _1.
The IDs of 102 to 102 _n are checked in order. Slave device 102
_{1 to} 102 _n perform ID transmission for a predetermined time, and thereafter perform normal communication. The master device 101 checks the type of the received signal and performs the normal processing only when checking the normal data. At this time, each of the slave devices 102 ₁ to ₁ 1
02 _n apparatus for ID is verified the does not malfunction.

Further, when the power of only some of the slave devices is cut off for maintenance or the like, the power can be cut off on the slave device side. The master device can confirm that the slave device has been disconnected because communication with the slave device has been interrupted, and that the slave device has been powered on again by checking the ID output for a predetermined time after the power is turned on. Can be confirmed. For this reason, it is not necessary to configure so as to control the turning off and on of the power of the slave device under the control of the master device, so that the device configuration can be simplified and the system can be configured at low cost.

Next, a second embodiment of the present invention will be described. Each of the slave devices 102 _{1 to} 102 _n in the first embodiment shown in FIGS.
1 can be naturally realized by a general computer system, but can also be configured at a lower cost by hardware connected discretely without mounting a CPU. FIG. 3 is a circuit diagram showing a specific example of the configured slave device. This embodiment, remote I / O controller 301, a counter 302, an inverter 303, output register 304, setting unit 305, register data which is serially connected _{306 1,} 306 2, ..., is composed of 306 _n, normal Data register group 30 for continuously outputting the contents stored in each data register for performing processing
6, an adding circuit 307, integrating circuits 308 and 309, and an ID register 310 for storing the ID of the own station.

The remote I / O controller 301 and the counter 302 constitute an elapsed time detecting means for detecting whether a predetermined time has elapsed from the time of resetting.
04, addition circuit 307 and integration circuits 308 and 309
Are the data register group 306 and the ID register 310
And outputs the selected output to the master device. The remote I / O controller 301 is connected to a master device (both not shown) via I / O means, and sends the setting contents sent from the output register 304 to the master device. The master device periodically performs a communication operation with the slave device as shown in the flowchart of FIG. 2A. The remote I / O controller 301 transmits data transmitted from the master device during this communication operation. Each time the signal is received, the received signal S1 is output to the clock terminal (CK) of the counter 302. When the input to the clock terminal (CK) reaches a predetermined value, the counter 302 inverts the level of the output CY from “0” to “1”. Output CY is integrating circuit 3
08, one input terminal, a data register group 306, an output register 304, and an inverter 303. The output of the inverter 303 is supplied to the input terminal EP for stopping the counting operation of the counter 302,
4 and one input terminal of the integrating circuit 309, and the counter 302 stops its counting operation by receiving the input of “0” inverted by the inverter 303. In addition, the data register group 306 starts outputting the contents stored in each data register continuously by receiving the output CY of the “1” level.

The output of the data register group 306 is input to the other input terminal of the integrating circuit 308.
The output of the ID register 310 is input to the other input terminal 9. Each output of the integrating circuits 308 and 309 is input to the adding circuit 307, and the output of the adding circuit 307 is input to the output register 304. Therefore, when the counter 302 is performing the counting operation, the output of the ID register 310 is input to the output register 304, and the addition circuit 307 outputs the counter 302
Are stopped, the output of the data register group 306 is input to the output register 304.

The output register 305 outputs the output CY of the counter 302, the output circuit of the output CY, the output of the addition circuit 307, and the contents preset in the setting means 305 from predetermined bits. The setting means 3
Reference numeral 05 is provided to prevent a predetermined bit from being undefined. The output configuration of the output register 304 includes, for example, A3 to A0 indicating the input data address offset and the number of input bytes I3 as shown in FIG.
An 8-bit configuration consisting of .about.I0 is conceivable, and such a configuration may be adopted. FIG. 4B shows the contents of the input data address offset, and FIG.
3 shows the contents of I0.

In this embodiment configured as described above, the elapse of a predetermined time is confirmed by confirming that the number of received data sent from the master device is constant. The ID of the own station is output from the ID register to the master device until the number of received data transmitted becomes constant, and when the number of received data transmitted from the master device becomes constant, the normal data from the data register group 306 is output. Data for processing is output to the master device.

In the above-described embodiment, the elapse of the predetermined time is confirmed by confirming that the number of received data sent from the master device is constant. However, a timer generally used may be used. . In any case, C
By using discretely connected hardware without mounting a PU, it is possible to achieve a lower-cost configuration.

[0022]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, the master device can recognize the connected slave device by receiving the ID from the slave device, can prevent the occurrence of malfunction, and can reduce the device reliability. There is an effect that the property can be improved.

In addition, the number of processes required on the master device side to confirm the slave device is reduced, and the configuration of the master device can be simplified.

According to the second aspect of the present invention, in addition to the above effects, the slave device can be used without using a CPU.
Since it can be realized by hardware connected discretely, there is an effect that it can be configured at a lower cost.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIGS. 2A and 2B are flowcharts showing the operation of the embodiment shown in FIG.

FIG. 3 is a circuit diagram showing a configuration of a second exemplary embodiment of the present invention.

4 (a) to 4 (c) respectively show a second example shown in FIG.
FIG. 8 is a diagram for explaining the contents of an output register used in the embodiment of FIG.

FIG. 5 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

Reference Signs List 101 master device 102 _{1 to} 102 _n slave device 103 _{1 to} 103 _n ID sending means 104 ID recognition means 301 remote I / O controller 302 counter 303 inverter 304 output register 305 setting means 306 data register group 306 _{1 to} 306 _n data Register 307 Addition circuit 308, 309 Integration circuit 310 ID register S201 to S210 Step

Claims (2)

[Claims] 1. A remote system comprising one master device and at least one slave device remotely controlled by the master device, wherein the slave device transmits an ID indicating its own station at a reset time for a predetermined time. The master device includes an ID recognizing device for confirming the received content when communicating with the slave device. When the received content is an ID, the master device reads the ID and recognizes the slave device of the communication partner. A remote system having a slave device recognition function, which performs a normal processing operation when the received content is normal data used for a normal processing operation. 2. In a remote system including one master device and at least one or more slave devices remotely controlled by the master device, the slave device detects whether a predetermined time has elapsed since reset. An elapsed time detecting means; an ID register for storing an ID; a data register for storing normal data; and an ID register when the elapsed time detecting means detects that a predetermined time has elapsed from a reset time. Selecting output means for sending the output of the register to the master device, and sending the output of the data register to the master device when the elapsed time detecting means does not detect that a predetermined time has elapsed since the reset. The master device confirms the received content when communicating with the slave device. D recognition means, when the received content is an ID, reads this to recognize the slave device of the communication partner, and when the received content is normal data used for a normal processing operation, performs a normal processing operation. A remote system having a slave device recognition function.