JP2001061190A - Remote supervisory and controlling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure maintenance of system operation by fetching the editing format signal, that is transmitted through a 2nd communication path via a process input/output means and checking at least one of processing and format editing errors of a 1st means or communication errors of the 2nd communication path. SOLUTION: A communication circuit 15 checks whether a circuit type code of receiving data shows a control data output circuit. When the control data output circuit is shown to be in a normal receiving state, a format signal is sent to a control circuit 14. When the abnormality is detected, the status data showing the abnormality are sent to the circuit 14. Data, showing the normal or abnormal state of communication, serve as a data communication diagnostic flag. The circuit 14 returns the data communication diagnostic flag to an input/ output control part 10 via the circuit 15 as long as the communication is abnormal, and also a circuit address shows the control data output circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring and control device (slave station) provided between a master station and a monitoring and control device for monitoring and controlling the device, and is suitable for monitoring an internal abnormality itself. The present invention relates to a remote monitoring control device.

[0002]

2. Description of the Related Art JP-A-6-78374 discloses a remote monitoring control apparatus having a data processing section, a data input / output section, and an input / output section control section for exchanging data between the two by communication. . In this conventional example, a programmable logic controller (PLC) is used as a data input / output unit of a device to be monitored and controlled. Only a communication error between the master station device and the slave station, such as a check, is checked. If the communication error is normal, the error has been output to the device to be monitored and controlled via the PLC connection control unit. Further, as a conventional example of a transmission device of a remote monitoring control device, there is JP-A-63-131690. In this conventional example, a plurality of control devices on the slave station side are grouped, and a control execution bit for each device and a bit for instructing a state change (auxiliary code bit and ) Are also output. On the slave station side, the corresponding device is controlled by the control execution bit. The state of the device including the execution result is captured by the master station as a device status display bit. Therefore, the master station obtains an exclusive OR of the control execution bit related to the execution of the control and the status indication bit for each corresponding device, and obtains the logic of the OR output and the auxiliary code bit to obtain the master. Various abnormalities, such as an operation error or control failure on the station side, are detected. Still another conventional example is disclosed in JP-A-5-115.
No. 087. This is, for example, an example of a triple-system control device, which is composed of one main system and two sub-systems.
When there is a mismatch between the output of one main system and the output of two slave systems, the output from the main system is suppressed.

[0003]

However, Japanese Patent Laid-Open No. 6-7 / 1994
In No. 8374, erroneous control data output due to a communication error between the master station device and the slave station can be prevented, but a data processing unit in the slave station malfunctions or a logical defect created by the data processing unit occurs. Since abnormalities cannot be detected for the data transferred in the state, there is a possibility that erroneous control data is output to the monitored and controlled device. In addition, there is a disadvantage that an operator arranged in the master station apparatus performs an erroneous control operation and is not notified that the control operation has failed.

Japanese Patent Application Laid-Open No. 63-131690 discloses that a master station performs all monitoring and control, and a slave station is merely a terminal. Therefore, there is no description of the configuration in the slave station or the viewpoint of transmission errors or abnormalities in the slave station. JP-A-5-150
No. 87 does not relate to a remote monitoring device, but is an example in which a control system is a triple system. SUMMARY OF THE INVENTION An object of the present invention is to provide a remote monitoring control device capable of preventing an erroneous control output due to an abnormality of software or the like during processing in a slave station. Still another object of the present invention is to provide a remote monitoring and control apparatus which notifies an operator on a master station side of a control operation failure and enables maintenance of system operation to be ensured by re-control operation.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a master station is connected to a monitoring station.
In a remote monitoring control device interposed between a control device and a device for monitoring and controlling the device, a modem connected to the master station via a first communication path, processing means connected to the modem, and processing means connected to the processing means A second communication path for performing transmission in a predetermined format, and a parallel connection to the second communication path;
A process input / output unit having a plurality of control data output units and other input / output units;
A data output terminal to the control device, and a data input terminal from the monitoring / control device, and the processing means processes data sent from the master station via the modem, and converts the data into the predetermined format. A first means for performing editing; and a second means for transmitting the formatted signal to a second communication path.
Of the editing format sent via the communication path of (1), and checks at least one of a processing error by the first means, a format editing error, and a communication error of the second communication path. Disclosed is a remote monitoring control device that includes a checking unit that performs the checking.

Further, the present invention discloses a remote monitoring control device in which the checking means is provided in a control data output section in the process input / output means.

Further, the present invention relates to a remote monitoring and control device interposed between a master station and a monitoring / control device for monitoring / controlling the device, wherein the modem is connected to the master station via a first communication line. Processing means connected to the modem; first code area connected to the processing means and specifying an input unit and an output unit in the process input / output means; and second code specifying an internal circuit in the specified input unit and the output unit. A second communication path for performing transmission in a format having a third code area indicating a data area, a fourth code area indicating a data header, and a fifth code area indicating data; A process input / output unit having a plurality of control data output units and other input / output units connected in a multi-drop format to a communication system of the present invention, and a data output terminal to a monitoring / control device and monitoring provided in the process input / output unit And a data input terminal from a control device.The processing means processes data sent from the master station via the modem, edits the format, and outputs the data sent from the master station. Is the control data, a code specifying the control data output unit is set in the first code area, a code specifying the internal output circuit of the control data output unit is set in the second code area, A code indicating an output data setting is set in a code area of No. 3 and a format edit is performed in a fifth code area so as to set the control data in the bit corresponding to the position of the internal output circuit. A first means for transmitting the signal to the communication path, and a signal in a predetermined format sent from the process input / output means via the second communication path to process the signal and send the signal to the master station. The control data output unit fetches an edit format signal transmitted via the second communication path, and controls the fifth code area to control two or more bits. It is checked whether or not a code exists, and if there is a control code of 2 bits or more, it is determined that an editing error has occurred, and that fact is determined by a second
Disclosed is a remote monitoring control apparatus including third means for transmitting a signal in an edited format to a second communication path so as to send the edited signal to a master station via the means.

Further, the present invention relates to a remote monitoring control device interposed between a master station and a monitoring / control device for monitoring / controlling the device, the modem being connected to the master station via a first communication line. Processing means connected to the modem; first code area connected to the processing means and specifying an input unit and an output unit in the process input / output means; and second code specifying an internal circuit in the specified input unit and the output unit. A second communication path for performing transmission in a format having a third code area indicating a data area, a fourth code area indicating a data header, and a fifth code area indicating data; A process input / output unit having a plurality of control data output units and other input / output units connected in a multi-drop format to a communication system of the present invention, and a data output terminal to a monitoring / control device and monitoring provided in the process input / output unit And a data input terminal from a control device.The processing means processes data sent from the master station via the modem, edits the format, and outputs the data sent from the master station. Is the control data, a code specifying the control data output unit is set in the first code area, a code specifying the internal output circuit of the control data output unit is set in the second code area, A code indicating output data setting is set in a code area of No. 3, a code indicating whether control data is being selected is set in a fourth code area, and a code corresponding to the internal output circuit position is set in a fifth code area. First means for editing the bits so as to set the control data and sending the data to a second communication path; and a predetermined means transmitted from the process input / output means via the second communication path. Four Tsu preparative signal capturing process to the second to be transmitted to the modem to send to the master station
The control data output unit captures an edit format signal sent via the second communication path, and determines whether there is a code currently selected for control data in the fourth code area. Or, it is checked from the control code in the fifth code area whether or not the data is state change data. If the control data is being selected and the state change data is present, it is determined that an editing error has occurred, and that fact is determined via the second means. Disclosed is a remote monitoring control device including third means for transmitting a signal in an edited format to a second communication path to be transmitted to a master station.

Further, the present invention relates to a remote monitoring control device interposed between a master station and a monitoring / control device for monitoring / controlling the device, the modem being connected to the master station via a first communication line. Processing means connected to the modem; first code area connected to the processing means and specifying an input unit and an output unit in the process input / output means; and second code specifying an internal circuit in the specified input unit and the output unit. A second communication path for performing transmission in a format having a third code area indicating a data area, a fourth code area indicating a data header, and a fifth code area indicating data; A process input / output unit having a plurality of control data output units and other input / output units connected in a multi-drop format to a communication system of the present invention, and a data output terminal to a monitoring / control device and monitoring provided in the process input / output unit And a data input terminal from a control device.The processing means processes data sent from the master station via the modem, edits the format, and outputs the data sent from the master station. Is the control data, a code specifying the control data output unit is set in the first code area, a code specifying the internal output circuit of the control data output unit is set in the second code area, A code indicating a data type is set in a code area of No. 3, a code indicating whether control output is selected or not is set in a fourth code area, and a bit corresponding to the internal output circuit position is set in a fifth code area. And a predetermined format sent from the process input / output means via the second communication path by performing editing so as to set the control data to the second communication path. And a control means for receiving and processing the signal in the edit format and transmitting the signal to the modem for transmission to the master station. Then, the editing format was checked, and a code indicating a self-diagnosis result, a code indicating a data type diagnosis result, a code indicating a control data diagnosis result, and a code indicating a communication diagnosis result were set in the fourth code area. Disclosed is a remote monitoring control device that includes a third unit that edits a format, sends the edited format to a second communication path, and sends the editing format to the master station.

[0010]

FIG. 1 shows a master station device (referred to as a master station) 1.
FIG. 3 is a diagram illustrating a detailed configuration of a remote monitoring control device 1 and a remote station, which is a slave station, in particular, an internal configuration of the slave station 1. Slave station 1 and master station 13
Is connected to the communication line 13A. The slave station 1 performs a modem 11 for modulation and demodulation, a data transmission processing unit 3 for performing a communication error test of transmission / reception data on the communication line 13A and editing a transmission format on the line 13A, and performs data processing of the entire device in the slave station. A data processing unit 2, a plurality of display data input units 4 for inputting status display data of monitoring target devices, a plurality of measurement data input units 6 for inputting measurement data, a plurality of controls for outputting ON / OFF control data It comprises a data output section 5, a plurality of analog data output sections 7 for outputting analog control data, and an input / output section control section 10. A so-called process input / output unit composed of data input units 4 and 6 and data output units 5 and 7 was connected in parallel to an input / output unit control unit 10 by a communication line 8 in a multi-drop manner. The data processing unit 2, the data transmission processing unit 3, and the input / output control unit 10 exchange data via the internal bus 12.

Each of the plurality of control data output units 5
This is a circuit for outputting N / OFF control data, which is composed of substantially the same configuration system, and has m in the figure. The analog data output unit 7 is a circuit that outputs analog signals such as voltage, current, and pressure as control signals, and has y signals. The display data input unit 4 takes in a state signal of the device for monitoring the control device and sets it as display data. The measurement data input unit 6 captures measurement signals of a meter and a sensor as data, and has x number of measurement signals. The basic configuration inside the m control data output units 5 is the same. y analog data output units 7,
The internal basic configuration is the same for each of the n display data input units 4 and the x measurement data input units 6. For example, m = 256, y = 256, n = 3, x =
4. In the figure, as a basic configuration of the control data output unit 5, a control circuit 14, a communication circuit 15, a test circuit 16, and a plurality of output circuits 17 are shown. For example, the output circuit 17
There are 32 (8 × 4). The operation of the internal components of the control data output unit 5 is briefly described as follows. The communication circuit 15 performs communication error verification processing such as transmission and reception of data with the input / output control unit 10 and frame synchronization check, fixed mark verification, and inversion continuous transmission verification check. The test circuit 16 performs an error test on the received control data. The control circuit 14 performs all control of the control data output circuit. The output circuit 17 outputs control data.

FIG. 2 shows an example of the internal configuration of the test circuit 16.
The test circuit 16 includes the control data buffer 86, the other control data output circuit data buffer 85, and the control data O.
N bit number detection circuit 83, other circuit control data ON bit number detection circuit 84, multiplex control data detection circuit 80, control data bit change detection circuit 82, control data switching detection circuit 81 during control output, detection timing creation circuit 87 ,
Abnormality detection notification buffer 88 Data input buffer 89, Data output buffer 90, Timing signal input buffer 9
1, a timing signal output buffer 92.

FIG. 3 shows an example of the data structure. FIG.
(A) shows an example of a data format to be put on a communication line 8 connecting the input / output control unit 10 and the data input / output units 3 to 7. Among the data formats, the downstream format is input / output control unit 10 and data processing unit 2.
The format for the upstream is edited by the control circuit 14 in the control data output unit.
There is also a method in which the control circuit 14 adds necessary data to the format from the upstream and transmits it. The upstream transmission control means such as the control circuit 14 is also provided in the display data input unit 4 and the measurement data input unit 6. Circuit type (first byte position): data for specifying one of the data input / output units 3 to 7. Figure 3 shows the data structure.
(B). For example, “80H” indicates that the control data output unit 5 has been instructed. The relay contact output section 5A of “80H” is not shown in FIG. Circuit address (second byte position): data for specifying one of the circuits specified by the “circuit type” in the first byte position. FIG. 3C shows an example of data. For example, when "80H" of the control data output unit 5 is designated, since there are 256 output units 5 in the "circuit address", one of them is specified and designated. For example, if "00H",
Indicates that the first control data output unit 5 has been designated. Data type (third byte position)... This data designates the contents of the command, and FIG. 3D shows a specific example. For example,
If "00H", set "Default value data", "0
If it is "1H", it means "output data setting". Data header (4th byte position): header created by input / output control unit 10 shown in FIG.
There is a header created by the process input / output units 4 to 7 shown in FIG. The former is data sent from the input / output control unit 10 to the downstream process input / output units 4 to 7,
The latter is the opposite. The header data in FIG.
The least significant one of the eight bits is used, and indicates whether or not there is a control output (“0” indicates no selection and “1” indicates selection). The header data shown in FIG. 3 (f) indicates each of a self-diagnosis flag, a data type diagnosis flag, a control data diagnosis flag, and a communication diagnosis flag by 1 bit ("0" is normal, "1" is abnormal). It is. Data area (5th byte to
(8th byte)... Four-byte output data 1 to 4 obtained from the data processing unit 12 or input data sent from the display data input unit 4 and the measurement data input unit 6 to the master station are loaded.

Next, the operation will be described. When the control data is transmitted from the master station 13, the slave station 1 demodulates the data using the modem 11 and outputs the data to the data transmission processing unit 3.
The data transmission processing unit 3 performs serial / parallel conversion of the received data and at the same time performs a communication error test, and transfers the received data in a normal state and the data indicating an abnormality in an abnormal state to the data processing unit 2 via the internal bus 12. I do. For the data indicating the abnormality, the data processing unit 2 instructs the data transmission processing unit 3 to return the data to that effect, edits the data in a predetermined format, and sends the data to the master station. In the case of normal data, the data processing unit 2 transfers control data to the input / output unit control unit 10 via the internal bus. The input / output unit control unit 10 to which the data has been transferred from the data processing unit 2 edits the data into a predetermined format shown in FIG.

The format data shown in FIG. 3A created by the input / output control unit 10 is transmitted via the communication line 8 to each of the input / output units 4 to 7 connected in a multi-lock system.
Sent to Each of the input / output units 4 to 7 checks whether it is addressed to itself, and if it is addressed to itself, captures it. Here, the capture and processing at the control data output unit 5 which is one of the features of the present invention will be described. It will be described in detail. "80H" if it indicates the circuit 5.

If the circuit type area indicates the control data circuit 5, "80H" is set in the circuit address area, "00H" is set in the circuit address area if the data is the circuit address 1, and the output data setting is set in the data type area. To indicate "01
"H" is set, the control output state ("01H" during control output) is set in the data header area, and the output control data is set in the data areas 1 to 4.

Various codes for the control data output unit 5 are specified in the following format. Circuit type code: 80H, Circuit address code: One of 00H to 87H, Data type code: One of 00H, 01H, 03H
Transfer data header code... D0 bit position “1” or “0” For example, the control data output unit 5 receives a format signal transmitted via the communication line 8 and receives data including whether or not it is addressed to itself. When the received data is normal and the data type data shown in FIG. 3D is “00H” (default value data), a default value setting process is performed and “01H” (output data) is performed. in the case of,
Perform control data output processing. If the received data is normal, the data type data is "03H" (in the case of a self-diagnosis data return request), and the received data is abnormal, FIG.
The data is transmitted to the input / output control unit 10 with the header data shown in FIG.

FIG. 4 shows a detailed flow of the control data output unit 5. 4 will be described using the configuration of the test circuit 16 in FIG. The control data output unit 5 receives the format signal output to the communication line 8 by the communication circuit 15 (flow 21). After the communication error verification processing such as the serial / parallel conversion processing of the received data and the data parity check, the communication circuit 15 sets the circuit type code of the received data to “80H” indicating the control data output circuit (flows 23 and 2).
4) Check whether or not the control data output circuit transfers the format signal to the control circuit 14 in the case of normal reception, and transfers the status data indicating an abnormality to the control circuit 14 in the case of abnormality detection (flow) 22, 23, 24,
23a, 24a). This normal and abnormal data is shown in FIG.
It becomes the data communication diagnosis flag of (f). Control circuit 14
Is abnormal, and if the circuit address is the control data output circuit (flows 25 and 25a), this flag is added and returned to the input / output control unit 10 via the communication circuit 15 (flow 31). If the communication is normal, the control circuit 14
Indicates whether the circuit type code of the received data is "80H" (flows 23 and 24) indicating the control data output circuit, and whether the circuit address is the control data output circuit (m
) (Flow 25), and whether the data type data is “default value setting” (flows 26 and 2).
7) Whether or not “output data setting” (flows 26 and 2
8) Whether or not it is a “self-diagnosis data return request” (flow 4
Check 0, 41). Here, the self-diagnosis is a self-check in the control data output unit 5, for example, a memory error of the buffer memory 86 or a processing error is diagnosed by a check unit. If the default value is set, the control circuit 14 sets the default value of the internal circuit of the control data output unit 5 (flow 32). If the request is not an output data setting and self-diagnosis data return request (flow 28), the control circuit 14 determines that there is a setting error (abnormal) in the circuit type code (FIG. 3B) in the control data output unit 5. The data type diagnosis flag (FIG. 3 (f)) is set to "1" and returned from the communication circuit 15 to the input / output control unit 10 via the communication line 8 (flow 33).

On the other hand, in the case of output data setting (flow 28), a format signal, in particular, a data header and control data 1 to 4 are sent to the test circuit 16. Further, when the address is not the corresponding circuit address (that is, when the address is another circuit address) (flow 25), a format signal, in particular, a data header and control data 1 to 4 are sent to the test circuit 16. Test circuit 16
Then, these applicable and non-applicable data are stored in buffers 86 and 85
Is stored separately (flow 39).

The test circuit 16 checks the data in the buffers 86 and 85 for a predetermined error (flow 2).
9) When an error is detected, the fact is sent to the control circuit 14.
In response to this, the control circuit 14 sets "1" indicating abnormality to the control data diagnostic flag shown in FIG.
5 is returned to the input / output control unit 16 via the communication line 8 (flow 35).

If the test circuit 16 does not detect the predetermined error, the test circuit 16 reports this to the control circuit 14 and outputs control data from the output circuit 17 to the controlled device (flow 3).
0).

A description will now be given of a predetermined error in the test circuit 16 and its detection operation. The test circuit 16 is a PIO data bus 16
A, a PIO timing signal bus 16B, and these buses 16A, 16B are connected to a communication circuit 15 and a control circuit 14. The data input buffer 89 takes in the data header and the control data 1 to 4 from the bus 16A while distinguishing between themselves and others, and if it is itself, sends it to the buffer 86 via the internal data bus, and outputs the other data. If the data is addressed to the unit 5, the data is sent to the buffer 85 via the internal data bus and stored. The reason why control data destined for the other data output unit 5 is taken in is to check whether there is an abnormality in the control data for itself together with the control data for the other output unit 5. The following (b) corresponds to this. There is a timing signal input buffer 91 for timing management of the format signal. This timing is sent to the test timing generation circuit 87 via the internal timing bus, and is used for test timing. The detection circuit 83 detects the number M of control data ON bits in the buffer 86,
Detects the number N of control data ON bits in the buffer 85. This is an error detection method attributed to the connection and signal transmission method by the multi-drop method. That is, in the multi-drop system, m control data output units 5 are connected to the communication line 8.
Are connected, and control data 1 to 4
, And only one bit at the position of the device to be controlled among the (control data 1 to 4) × m output circuits 17 is ON data. It is promised that it will not be turned on at more than a bit. If there is ON in two bits or more (that is, ON in multiple), it is regarded as erroneous control data. The multiplex control data detection circuit 80 takes in the outputs M and N of the detection circuits 83 and 84 and performs the following test. (A), M ≧ 2 (B), M = 1 and N ≧ 1 If any of these, it is determined that the control data is erroneous.

The detection circuit 82 detects whether or not the control data in the buffer 86 has been changed (change from ON to OFF and from OFF to ON). The detection circuit 81 sets the control output presence / absence flags “1” and “0” in the header data shown in FIG.
At the same time when the control data is changed from OFF to ON, it is checked whether the status of the flag before the change was "0" at the same time as the change from "1" to "0" and the change from "0" to "1". If the state of the flag before the control data is changed from OFF to ON is “1”, it is determined that the control data is being changed during control output, and an abnormality is determined. When the control data is changed from ON to OFF, the state of the flag is changed from “1” to
It is checked whether it has changed to “0”, and if the flag remains in the state of “1”, it is determined to be abnormal. The abnormality determination result during the control output is sent to the abnormality detection notification buffer 88.
Here, the control output presence / absence flag in the header data is set to “1” when one bit at the position of the control target device in the control data 1 to 4 is turned on, and is set to “0” when it is turned off. This data is set, and when the flag is “1”, it indicates that control data is being output.

The circuit 80 sends the abnormality determination result of the control data to the abnormality detection notification buffer 88. This buffer 8
The content of 8 is sent to the control circuit 14, is set as a flag in the header of FIG. 3F, and is sent to the input / output control unit 10 via the communication circuit 15 and the communication line 8.

FIG. 6 shows the flow of signal transmission and reception between the input / output control unit 10 and the control data output unit 5 of the monitoring / control device 1. The transmission data from the input / output control unit 10 refers to the format signal of FIG. 3A, and the reception data at the control data output unit 5 refers to the format signal obtained via the communication line 8. The control data output unit 5 performs various error checks, and if normal, performs control data output processing and the like. When an error occurs or when a self-diagnosis return request is made (03H in FIG. 3D), transmission data is created and sent to the input / output control unit 10 via the communication line 8.

When the control data is composed of the device selection data and the device control data which is the original control data, the control circuit 14 performs the operations before the output data setting judgment (flow 28) as shown in FIG. If an error is detected in the test circuit 16, the same processing as described above is performed, but the test circuit 1
If the data is updated normally in step 6 and the data update is the device selection data, the data header code is determined (flow 37). Then, the device selection data abnormality is returned to the data processing unit 2 via the input / output control unit 10, and the process is terminated (flow 35). If the control output is not being performed, the data is output to the output circuit 17. Upon receiving the error message data returned from the control data output unit, the data processing unit 2 notifies the master station device 1 that there is an abnormality in the received data via the data transmission processing unit 3 and the modem 11.
Notify 3.

[0027]

As is apparent from the above detailed description, according to the present invention, the control data output unit checks the control data transferred from the data processing unit via the input / output unit control unit, and checks the control data. If an abnormality is detected, it is possible to discard the data and simultaneously return the occurrence of the control data abnormality to the master station device via the input / output unit control unit, the data processing unit, the data transmission processing unit and the modem,
It is possible to notify the operator located in the master station device that the control operation has failed.

[Brief description of the drawings]

FIG. 1 is an internal circuit block diagram of a remote monitoring and control device in which a data processing unit and each data input / output unit according to an embodiment of the present invention are connected by a communication line.

FIG. 2 is a block diagram of a test circuit according to the embodiment of the present invention.

FIG. 3 is an example of communication data definition between a data processing unit and each data input / output unit according to the embodiment of the present invention.

FIG. 4 is a circuit operation flow example 1 of the control data output unit according to the embodiment of the present invention.

FIG. 5 is a circuit operation flow example 2 of the control data output unit according to the embodiment of the present invention.

FIG. 6 is a communication example between an input / output control unit and a control data output unit according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 remote monitoring control device slave station 2 data processing unit 3 data transmission processing unit 4 display data input unit 5 control data output unit 6 measurement data input unit 7 analog data output unit 8 communication line 9 control monitored equipment 10 input / output unit control unit Reference Signs List 11 modem 12 device internal bus 13 remote monitoring control device master station 14 control circuit 15 communication circuit 16 test circuit 17 output circuit 80 multiplex control data detection circuit 81 data switching detection circuit during control output 82 relevant control data bit change detection circuit 83 pertinent Control data ON detection circuit 84 Other circuit control data ON detection circuit 85 Other control data output circuit control data buffer 86 Control data output circuit control data buffer 87 Detection timing creation circuit 88 Abnormality detection communication buffer 89 Data input buffer 90 Data output buffer 91 Taimi Grayed signal input buffer 92 timing signal output buffer

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroshi Tsuda 3-2-1 Sachimachi, Hitachi City, Ibaraki Prefecture Inside Hitachi Engineering Co., Ltd. (72) Inventor Mitsuhiro Tabira 5-chome Omikacho, Hitachi City, Ibaraki Prefecture No. 1 F-term (reference) at Hitachi, Ltd. Omika Works 5H223 DD07 EE04 EE11 EE19 5K048 BA21 DC07 EA14 EB01 EB02 EB08 EB10 FC01 GB05 HA01 HA02 9A001 LL01 LL05 LL09

Claims (5)

[Claims] 1. An intervening system between a master station and a monitoring / control device,
In a remote monitoring control device for monitoring and controlling the device, a modem connected to the master station via the first communication path, a processing unit connected to the modem, and a transmission unit connected to the processing unit and performing transmission in a predetermined format. And a process input / output unit having a plurality of control data output units and other input / output units connected in parallel to the second communication line and a monitoring / control device provided in the process input / output unit And a data input end from a monitoring / control device.The processing means processes data sent from the master station via a modem, and edits the data into the predetermined format. And a second means for sending the formatted signal to a second communication path, wherein the process input / output means is transmitted via the second communication path. Coming edit A remote monitoring control device that includes a check unit that fetches a mat signal and checks at least one of a processing error in the first unit, a format editing error, and a communication error in the second communication path. . 2. The remote monitoring control device according to claim 1, wherein said checking means is provided in a control data output section in a process input / output means. 3. An intervening system between the master station and the monitoring / control device,
In a remote monitoring control device for monitoring and controlling the equipment, a modem connected to the master station via the first communication path, processing means connected to the modem, and an input unit in the process input / output means connected to the processing means And a first code area for specifying an output section, a second code area for specifying an internal circuit in the specified input section and output section, a third code area indicating a data type, and a fourth code indicating a data header. A second communication path for performing transmission in a format having a fifth code area indicating a region / data, and a plurality of control data output sections and other input / output sections connected to the second communication path in a multi-drop format A process input / output means having: a data output end to the monitoring / control device and a data input end from the monitoring / control device provided in the process input / output means; Processes the data sent via the modem from the master station, the edits to the format, when the data sent from the master station of the control data,
A code specifying the control data output unit is set in the first code area, a code specifying the internal output circuit of the control data output unit is set in the second code area, and a code specifying the internal output circuit is set in the third code area. A code indicating an output data setting is set, a format is edited in the fifth code area so as to set the control data in the internal output circuit position corresponding bit, and the first code is transmitted to the second communication path. Means,
A second means for receiving a signal in a predetermined format sent from the process input / output means via the second communication path, processing the signal, and sending the processed signal to the modem for transmission to the master station. The data output unit captures an edit format signal transmitted via the second communication path, checks whether a control code of 2 bits or more exists in the fifth code area, and When there is a control code, a third means for transmitting a signal in an edited format to a second communication path is provided to determine an editing error and to transmit the fact to the master station via the second means. Remote monitoring control device. 4. An intervening device between the master station and the monitoring / control device,
In a remote monitoring control device for monitoring and controlling the equipment, a modem connected to the master station via the first communication path, processing means connected to the modem, and an input unit in the process input / output means connected to the processing means And a first code area for specifying an output section, a second code area for specifying an internal circuit in the specified input section and output section, a third code area indicating a data type, and a fourth code indicating a data header. A second communication path for performing transmission in a format having a fifth code area indicating a region / data, and a plurality of control data output sections and other input / output sections connected to the second communication path in a multi-drop format A process input / output means having: a data output end to the monitoring / control device and a data input end from the monitoring / control device provided in the process input / output means; Processes the data sent via the modem from the master station, the edits to the format, when the data sent from the master station of the control data,
A code specifying the control data output unit is set in the first code area, a code specifying the internal output circuit of the control data output unit is set in the second code area, and a code specifying the internal output circuit is set in the third code area. A code indicating an output data setting is set, a code indicating whether control data is being selected is set in a fourth code area, and the control data is set in a bit corresponding to the internal output circuit position in a fifth code area. The editing is performed so as to be set, and the first means for sending out to the second communication path and the signal in a predetermined format sent from the process input / output means via the second communication path are taken in. Second means for processing and sending to the modem for sending to the master station;
The control data output unit captures an edit format signal sent via the second communication path, and determines whether there is a code currently selected for control data in the fourth code area. It is checked from the control code in the code area whether or not the state data is changed. If the control data is selected and the state is changed data, it is determined as an editing error, and the fact is transmitted to the master station via the second means. A remote monitoring and control device including third means for transmitting a signal in an edited format to a second communication path. 5. Interposed between the master station and the monitoring / control device,
In a remote monitoring control device for monitoring and controlling the equipment, a modem connected to the master station via the first communication path, processing means connected to the modem, and an input unit in the process input / output means connected to the processing means And a first code area for specifying an output section, a second code area for specifying an internal circuit in the specified input section and output section, a third code area indicating a data type, and a fourth code indicating a data header. A second communication path for performing transmission in a format having a fifth code area indicating a region / data, and a plurality of control data output sections and other input / output sections connected to the second communication path in a multi-drop format A process input / output means having: a data output end to the monitoring / control device and a data input end from the monitoring / control device provided in the process input / output means; Processes the data sent via the modem from the master station, the edits to the format, when the data sent from the master station of the control data,
A code specifying the control data output unit is set in the first code area, a code specifying the internal output circuit of the control data output unit is set in the second code area, and a code specifying the internal output circuit is set in the third code area. A code indicating a data type is set, a code indicating whether control output is being selected is set in a fourth code area, and the control data is set in a bit corresponding to the internal output circuit position in a fifth code area. A first means for editing the data to be transmitted to the second communication path and a signal in a predetermined format transmitted from the process input / output means via the second communication path. And a second means for sending to the modem to send to the master station, wherein the control data output unit fetches an edit format signal sent via the second communication path, and Format Check, and in the fourth code area,
Edits a format in which a code indicating a self-diagnosis result, a code indicating a data type diagnosis result, a code indicating a control data diagnosis result, and a code indicating a communication diagnosis result, and sends the edited format to the second communication path. And a remote monitoring control device having third means for transmitting the information to the master station.