JPH021994Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a centralized monitoring device for a large number of distributed devices.

(Prior Art) A monitored device failure detection device as shown in FIG. 4 is conventionally known. L ₁ and L ₂ each indicate a transmission line, one end of which is connected to the station device 1 for detecting a failure of the monitored equipment, and a failure detection contact AR' is connected to the transmission line L ₁ and L ₂ to detect a failure of the monitored equipment. Detection field device 1
1 to 16 are connected to each other. In addition, BR'~
BR' is the contact point of automatic return relay BR. The station device 1 for detecting failure of monitored equipment includes a power source E and a resistance value detection circuit 1 that detects a resistance value assigned to a field device for detecting failure of monitored equipment that has failed, as will be described later.
It has 0. The field devices 11 to 16 for detecting failure of monitored equipment are connected in parallel with circuits in which resistors R ₃ and R ₄ having predetermined resistance values are connected in series to reversely connected diodes D ₁ and D ₂ , respectively, and resistor R ₄ is sandwiched between the circuits. , consists of connecting the automatic recovery relay BR. When the equipment is normal, the detection relay is in operation and contact AR' is in contact with the line, and field devices 11 to 16 are connected to the line.
It is separated from L ₁ and L ₂ . When the equipment fails, the failure detection relay falls, and the contact AR' contacts the field equipment 11 side and is connected to the line, so that the power from the station equipment 1 is transmitted via the lines L ₁ and L ₂ to the diodes D ₁ , flows through resistor R ₃ . After a predetermined time,
By reversing the polarity of the power supply, current flows through resistor R ₄ and diode D ₂ . Thereby, the resistance value detection circuit 10 of the station device 1 can detect the resistance values of the resistors R ₃ and R ₄ . Since the resistors R ₃ and R ₄ in each field device are each given a unique resistance value, it is possible to detect which field device has failed based on the combination of resistance values detected by the resistance value detection circuit 10. can. Although an automatic return type circuit has been described above, a fixed type without relay BR and its contacts may also be used.

However, this device has a problem in that it cannot centrally monitor equipment using a large amount of information.

(Problems to be Solved by the Invention) The present invention is capable of switching between the station equipment of the above-mentioned monitored equipment failure detection device and the station equipment of the new multi-information device in parallel at one end of a pair of transmission lines. The multi-information station equipment and on-site equipment are used to regularly perform multi-information monitoring of monitored equipment, and if any of the monitored equipment breaks down, the multi-information station equipment and on-site equipment are connected to Automatically switches to station equipment and on-site equipment for detecting equipment failures, detects the equipment in question, and immediately continues multi-information control of equipment to be monitored, thereby allowing one pair of transmission lines to be used. The aim is to realize efficient centralized monitoring of equipment.

(Means for Solving the Problems) A station device for detecting failure of monitored equipment and a station device for multi-information are switchably connected to one end of a pair of transmission lines. The station apparatus for detecting failure of monitored equipment is constructed as described above with reference to FIG.

The multi-information station equipment includes a transmission transmission section, a reception transmission section, a data memory for storing transmitted and received signals, a control information input section into which control information is input, a display information output section from the multi-information field device, and the device is normal. It has a normal operation monitoring unit and a line switching unit that are activated when the line is activated. The line switching unit has a simultaneous disconnection signal generation unit that generates an all-disconnection signal when there is no display information input from field devices including terminal field devices for a predetermined period of time, and a line switching signal generation unit. is set to maintain operation under the condition that the normal operation monitoring section is in operation and the simultaneous disconnection signal generation section is inactive. The multi-information field equipment includes a transmission transmission section, a reception transmission section, a data memory that stores the transmission and reception information, a control information output section that outputs control information from the multi-information station equipment to the monitored equipment, and display information from the monitored equipment. The input section, the normal operation monitoring section that operates when the device is normal, the detection section that detects the unique number of the field device sent from the multi-information station equipment, and the self-calling signal detection section. It has a received signal acquisition control section. The line switching unit compares the received field equipment unique number and the simultaneous disconnection number, and outputs an output when they match, and the normal operation monitoring unit is in operation, and
It has a switching signal generating section that maintains operation when there is no output from the comparing section.

(Example) The present invention will be explained according to the example shown in FIGS. 1 to 3.

FIG. 1 shows the overall structure of the present invention.
Station equipment for monitoring equipment failure detection 1, transmission line L ₁ ,
L ₂ , failure detection contact AR', field devices 11 to 16 for monitoring equipment failure detection, and contact BR' of automatic recovery relay BR have the same configuration as those with the same symbols shown in FIG. 2 is a multi-information station device connected to one end of the transmission lines L ₁ , L ₂ in parallel with the station device 1 via switching contacts CHR ₁ , CHR ₂ , and 21 to 26 are the transmission lines L ₁ , L 2 . This is a multi-information field device connected to ₂ via switching contact CHRF'. 27 and 28 are multi-information terminal devices, and 27' and 28' are terminal devices for detecting failure of monitored equipment.

FIG. 2 shows details of the monitored equipment failure detection station device 1, the multi-information station device 2, and the line switching unit 20.

As described above with reference to FIG. 4, the station device 1 for detecting failure of monitored equipment has a power source E and a resistance value detection circuit 10 for detecting the resistance value assigned to the field device for detecting failed monitored equipment failure. The multi-information station device 2 is an electronic computer, and includes an arithmetic unit 30, a data memory 31, a control information input section 32, a display information output section 33, a normal operation monitoring section 34, and a transmission transmission section 3.
5, a receiving/transmitting section 36 and a coupling section 37. The control information is input to the arithmetic unit 30, which is an electronic computer, via the control information input section 32, and is stored in the data memory 31. The control information stored in the data memory 31 is transmitted to the transmission section 35 and the coupling section 37.
is output to transmission line _L1 or _L2 via. The answer information from the multi-information field devices 21 to 28 is sent to the data memory 3 via the coupling section 37 and the reception/transmission section 36.
1 is stored. The display information stored in the data memory 31 is displayed externally via the display information output section 33 under the control of the arithmetic unit 30. A unique number is assigned to each of the multi-information field devices 21 to 28, and the station device 2 combines the unique number or its subsequent control information and transmits it to the transmission line _L1 or _L2 . Thereby, the field device to which the unique number has been assigned receives it and answers the display information to the station device for each monitoring item. After monitoring one field device, a unique number is sent to the next field device and the same monitoring is performed. In this way, the station equipment 2 constantly and cyclically monitors the field equipment that it is in charge of. 20
is a line switching unit between the station device 1 for detecting failure of monitored equipment and the station device 2 for multi-information. The input side of the AND gate AG ₁ is connected to the output side of the reception/transmission unit 36 and the output side 41 to which the arithmetic unit 30 outputs when receiving from the multi-information field device. The output side of AND gate AG ₁ is connected to AND gate AG ₃ via timer 38.
connected to. AND gate AG ₃ has arithmetic unit 3
An output 42 is also connected which outputs when 0 receives a number from an end field device. The output side of AND gate AG ₁ and the output side 42 are connected to AND gate AG ₂ . The output side of AND gate _AG3 is connected via counter 39 to the simultaneous disconnection signal generation circuit 40 and the input side of AND gate _AG4 . The AND gate AG ₄ is connected to an output side 43 that outputs when all of the multi-information field devices 21 to 28 are disconnected from the transmission lines L ₁ and L ₂ .

Relay R ₁ is connected to the output side of ungate AG ₄ . CHR ₁ and CHR ₂ are line switching relays, which become activated when relay R ₁ falls and relay R ₂ operates.

Figure 3 shows a field device 11 for detecting failure of monitored equipment.
and details of the multi-information field device 22 are shown.
Field device 11 and contacts for monitoring equipment failure detection
The configurations of AR' and BR' are the same as described above with respect to FIG.

The part surrounded by 22 indicates a multi-information field device, 44 is an arithmetic circuit, 45 is a data memory, 46
47 is a display information input section; 47 is a control information output section; 48 is a display information input section;
49 is a normal operation monitoring section, 49 is a transmission transmission section, 50 is a reception transmission section, 51 is a coupling section, 52 is a self-calling signal detection section, 53 is a reception signal acquisition control section, and R ₆ is a relay. The part surrounded by 58 indicates a line switching section, 54 is a shift register, 55 is a comparator, 56 is a simultaneous disconnection number storage section, 57 is a timer, and _R5 is a relay. Line switching relay CHRF
is activated by the fall of relay _R5 and the operation of relay _R6 .

In such a configuration, there is no failure in the monitored equipment, the field devices 11 to 16 for detecting failure of the monitored equipment are disconnected from the transmission lines _L1 and _L2 , and the multi-information station device 2 and the field devices 21 to 28 are disconnected from the transmission lines L1 and L2. is connected to the transmission line. In FIG. 2, the control information is transmitted to the arithmetic circuit 3 via the control information input section
The control information is stored in the data memory 31 under the control of the control circuit 0, and the control information, that is, the unique number assigned to the field device or the information obtained by combining it with the control information, is sent via the transmission section 35 to the transmission line L. ₁ , transmit to _L2 . In field equipment to which the unique number has not been assigned, the self-calling signal detection unit 52 is sent via the reception and transmission unit 50 in FIG.
It is detected that the unique number inputted to the device is different from its own unique number, the received signal acquisition control section 53 does not operate, and the received information is not stored in the data memory 45.

When the self-calling signal detection unit 52 detects that the transmitted unique number and its own unique number are the same, the field device activates the received signal acquisition control unit 53 and controls the arithmetic unit 44. Accordingly, the control information is stored in the data memory 45. At the same time, the unique number is also stored in the shift register 54, and compared with the simultaneous disconnection number stored in the simultaneous disconnection number storage section 56 in the comparator 55, but the two do not match.
The output of comparator 55 is “0” and relay _R5
remains inactive. On the other hand, the normal operation monitoring unit 48 of the field device is in operation, and the relay _R6 remains in operation. When relay _R5 falls and relay _R6 operates, both falling contact R' ₅ and operating contact R' ₆ are closed, line switching relay CHRF remains operational, and the relevant field device switches to transmission line L via operating contact CHRF'. ₁ , maintain connection with _L2 . The control information stored in the data memory 45 is output to the monitored device via the control information output section 47, and the display information as answer information is sent to the display information input section 46, the calculation section 44, the transmission section 49, and the coupling section 51. , and is transmitted to the receiving/transmitting unit 36 of the station equipment 2 in FIG. 2 via the transmission lines L ₁ and L ₂ .

The display information is stored in the data memory 31,
It is output to the outside via the display information output section 33.
In this way, from the station device 2, the field device 21
-28, receives display information as answer information from the field device each time, and monitors the status of each component of the field device.

When the station equipment 2 is normal, the normal operation monitoring section 34 is in operation and the relay _R2 is maintained in operation. Every time the station device 2 receives display information from the field devices 21 to 28, the output of the reception transmitter 36 and the calculation device 30
The output from output side 41 of is applied to AND gate _AG1 , and timer 38 is reset. When display information is being received from the terminal field device, the computing device 3
It is output from the output terminal 42 of 0. Therefore, when there is a reception from the end field device, AND gate AG ₁ becomes conductive and AND gate AG ₂ becomes conductive, resetting the counter 39. The counter 39 does not output until it reaches a predetermined count value. Therefore, counter 39
or as long as there is no output from the output side 43 of the arithmetic device 30, the AND gate AG ₄ is not conducting and the relay R ₁ is in the falling state. Relay R ₁ falls,
With relay R ₂ operating, falling contact R′ ₁ and operating contact R′ ₂ closed, line switching relay CHR remains operating.
The station equipment 2 is maintained connected to the transmission lines L ₁ and L ₂ .

In this state, if any of the monitored devices fails, the failure detection relay of that device will fall and the third
The on-site device for detecting failure of the monitored equipment in the figure,
For example, 11 line switching contacts AR' switch to the field equipment side, and the transmission line
The upper and lower levels of L ₁ and L ₂ are disconnected, and information transmission between the multi-information station device 2 and the lower multi-information field device is eliminated. In this state, even if control information is transmitted from the multi-information station device to the lower field device, answer information is not received by the station device, so the reception and transmission unit 36
The output from is "0" and timer 38 is not reset. The timer 38 receives the reset signal for a predetermined period of time.
It is set to output "1" if no input is received. On the other hand, when the station device 2 becomes capable of receiving from the terminal field device, it outputs from the output side 42. As a result, AND gate AG ₃ becomes conductive and counter 3
9 counts "1". After that, the multi-information station device 2 sequentially repeats transmission to all the field devices, and the counter 39 becomes "1" each time it is possible to receive from the terminal field device.
Count. The counter 39 is set to output "1" when it counts a predetermined count value. The output of the counter 39 causes the simultaneous disconnection signal generation circuit 40 to operate, and the simultaneous disconnection signal is transmitted via the transmitter 35 to the multi-information station equipment located above the failure point. These on-site devices store the simultaneous disconnection signal shown in FIG. Since both match, the output of comparator 55 is "1", relay _R5 is activated, simultaneous switching relay CHRF falls, and station equipment 2 confirms that no display information is received from any field equipment. “1” is output from the output terminal 43 of the arithmetic unit 30. Since "1" is output from the counter 39, "1" is output from AND gate circuit _AG4 , relay _R1 operates, and its contact _R1 is opened, and the line switching relay of the station equipment
CHR falls, and line switching contacts CHR ₁ and CHR ₂ switch to the station equipment side for detecting failure of monitored equipment. Since the contact AR' of the field device for fault detection of the faulty monitored equipment has fallen to the field device side, the resistance value detection circuit 10 of the station device 1 detects the resistance value of the pair of faulty field devices as described above. detection and detect faulty field equipment. In the station equipment 1, the detection signal activates the relay PSR, and the closing of the contact PSR' causes the control information input section 32 of the multi-information station equipment 2 to operate.
Gives a capture completion signal to Thereby, the multi-information station device 2 sets the output of the output terminal 43 to "0" under the control of the arithmetic device 30. and gate thereby
The output of AG ₄ becomes “0” and the line switching relay
When the CHR becomes operational, the transmission lines L ₁ and L ₂ are switched to the multi-information station equipment 2 side. On the other hand, the automatic recovery relay BR, which is a field device for fault detection, falls after transmitting the resistance value of resistor R ₄ , and the transmission line between the upper and lower units is connected by closing the falling contacts BR′ ₁ and BR′ ₂ . be done. Multi-information station device 2 is station device 1 for monitoring equipment failure detection.
The transmission is set to start approximately 8 seconds after the information acquisition completion signal is input from the terminal. After that, the multi-information station equipment continues to monitor the field equipment.

In the above embodiments, the operation of each device, especially the operation of the line switching unit, will be described as an AND gate,
Although the description has been made using timers, counters, relays, etc., it is also possible to operate them under the control of a microcomputer, and such a configuration is also included in the technical scope of the present invention.

(Effects of the invention) According to the invention, the equipment to be monitored is always monitored with multiple information by the station equipment for multiple information, and when any of the equipment to be monitored breaks down, the equipment for multiple information is disconnected from the transmission line. A station device for detecting failure of monitored equipment is automatically connected to the transmission line, detects the failed monitored equipment, repairs or replaces the monitored equipment, and then detects the failure of the monitored equipment. The system is configured to automatically recover a transmission line that has been cut off by a pair of transmission lines, allowing multi-information station equipment and on-site equipment to continue multi-information monitoring of monitored equipment. Its practical effects are remarkable in that it enables failure detection of monitoring equipment and multi-information monitoring.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram showing the overall configuration of the present invention;
The figure is a circuit diagram showing the details of the station device for monitoring equipment failure detection and multi-information station device in Fig. 1 and their switching operations, and the figure 3 is a circuit diagram showing the station device for monitoring equipment failure detection and multi-information station equipment in Fig. 1. FIG. 4 is a circuit diagram showing details of a station device and a conventional field device for detecting failure of monitored equipment. DESCRIPTION OF SYMBOLS 1...Station device for monitoring equipment failure detection, 2...Multi-information station equipment, 10...Resistance value detection circuit of station equipment for monitoring equipment failure detection, 11, 12, 13, 1
4, 15, 16... Field device for monitoring equipment failure detection, 20... Line switching unit of multi-information station device, 2
1, 22, 23, 24, 25, 26, 27, 28
...Multi-information field device, 31...Data memory of multi-information station device, 32...Control information input section of multi-information station device, 33...Display information output section of multi-information station device, 34... ...Normal operation monitoring unit of multi-information station equipment, 35...Transmission transmission unit of multi-information station equipment, 36
...Receiving and transmitting section of multi-information station equipment, 40... Simultaneous disconnection signal generation circuit of multi-information station equipment, 45...
Data memory of the multi-information field device, 46...Display information input section of the multi-information field device, 47...Control information output section of the multi-information field device, 49...Transmission section of the multi-information field device, 50... Receiving and transmitting unit of multi-information field device, 52... Self-calling signal detection section of multi-information field device, 53... Reception signal acquisition control section of multi-information field device, 55... Multi-information field device Comparison unit of field equipment, 58...Line switching unit of multi-information field equipment, AR'... Contact point for detecting failure of monitored equipment,
CHR...Line switching signal generation section of multi-information station equipment,
CHRF...Switching signal generator of multi-information field equipment,
D ₁ , D ₂ ... Reversely connected diodes of field equipment for monitoring equipment failure detection, L ₁ , L ₂ ... Transmission line, R ₃ ,
R ₄ ...Resistance of field device for detecting failure of monitored equipment.

Claims (1)

[Scope of utility model registration request] The station device for detecting failure of monitored equipment and the station device for multi-information are connected to the transmission line in a switchable manner. A resistance value detection circuit is provided to detect the resistance value of the monitored equipment, and the on-site device for detecting failure of the monitored equipment consists of a parallel circuit in which a resistor having a predetermined resistance value is connected to each of reversely connected diodes. The multi-information station device is connected via the contact point of the monitoring equipment failure detection relay, and includes a transmission transmission section, a reception transmission section, a data memory for storing transmitted and received signals, a control information input section into which control information is input, and a multi-information station device. Consists of a display information output section that outputs display information from field equipment to the outside, a normal operation monitoring section that operates when the device is normal, and a line switching section.The line switching section includes terminal field devices for a predetermined period of time. When there is no display information input from the field equipment, the simultaneous disconnection signal generation unit that generates the simultaneous disconnection signal and the normal operation monitoring unit are in operation, and the simultaneous disconnection signal generation unit is inoperative. The multi-information field device consists of a transmission transmission section, a reception transmission section, a data memory that stores the transmitted and received signals, and a line switching signal generation section that is set to A control information output section that outputs to equipment, a display information input section that receives display information from monitored equipment, a normal operation monitoring section that operates when the device is normal, and information sent from multi-information station equipment. It consists of a self-calling signal detection unit that detects the unique number of the field device, a received signal acquisition control unit that is activated by the operation of the self-calling signal detection unit, and a line switching unit. It is comprised of a comparison section that compares the number and the simultaneous disconnection number and outputs an output when they match, and a switching signal generation section that maintains operation when the normal operation monitoring section is in operation and there is no output from the comparison section. A central monitoring device consisting of a number of things.