JPH0711079U - Supervisory control device - Google Patents

Abstract

(57) [Summary] [Construction] In the slave station of the supervisory control device, the logic unit 5 that performs transmission / reception processing with the master station and the plurality of input / output units 6 ... Is connected by a communication cable 7 having a signal line 7a for power supply and a power supply line 7b for supplying electric power from the power supply unit 9 of the logic unit 5 to each communication control unit 10 of the plurality of input / output units 6. [Effect] Even if a power supply failure occurs in an input / output unit 6 among a plurality of input / output units 6 existing in the slave station, the communication control unit 10 of the input / output unit 6 is provided with the power supply line 7
Since it is operable by power supply from the power supply unit 9 of the logic unit 5 via b and has a function of returning a READY signal to the logic unit 5, the processing of the logic unit 5 is not delayed, and the entire slave station The situation that the system goes down is avoided, and the reliability of the device is high.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a supervisory control device that is provided to various plants such as buildings, factories, roads, electric power, and water treatment, and that remotely controls and monitors various facilities.

[0002]

[Prior art]

 For example, in high-rise buildings such as buildings and highly automated factories, in order to efficiently operate, maintain, and manage them, various equipment such as lighting equipment, air conditioning equipment, power receiving and distribution equipment, heat source equipment, and utility equipment. Equipment is often monitored and controlled centrally.

Such monitoring control is connected to a master station that remotely controls and monitors the equipment connected to the slave station, and to various equipment, and inputs monitoring data (display / measurement data) from the equipment. Is transmitted to the master station and outputs the control data received from the master station to the equipment, and a monitoring control device equipped with a communication path connecting the master station and the slave station. ing.

As shown in FIG. 3, the slave station is connected to a logic unit 51 for receiving control data from the master station and transmitting monitor data to the master station, and is connected to various equipments to control data. Is input to the equipment and the monitoring data is input from the equipment, and a plurality of input / output units 52 ... And a communication cable 53 connecting the logic unit 51 and the input / output units 52.

The logic unit 51 includes a CPU (Central Processing Unit) section 54 configured by a microcomputer, and a power supply section 55 that supplies electric power to the CPU section 54. The input / output unit 52 also includes a communication control unit 56 that controls communication with the logic unit 51 via the communication cable 53, and an input / output unit (hereinafter, I / O unit) that also includes a contact output module for the analog input module. 57) and a power supply unit 58 for supplying electric power to the communication control unit 56 and the I / O unit 57.

For example, when control data for remote control of a certain equipment is transmitted from the master station, this control data is received by the logical unit 51 of the slave station. Upon receiving the control data, the CPU unit 54 of the logic unit 51 identifies the input / output unit 52 from the address included in the control data and sends a data reception request to the input / output unit 52. On the other hand, when the communication control section 56 of the input / output unit 52 returns a READY signal (operation enable signal) to the CPU section 54, the CPU section 54 controls the input / output unit 52 via the communication cable 53. The data will be sent. In the input / output unit 52, the communication control unit 56 receives the control data and outputs it to the I / O unit 57. Then, the I / O unit 57 outputs a signal according to the control data to the equipment.

[0007]

[Problems to be solved by the device]

 However, in the above-described conventional configuration, the power supply unit 58 is broken or the power supply unit 58 and the communication control unit 56 are broken in one of the input / output units 52 ... When a board failure such as disconnection occurs between the input and output units 52, power is not supplied to the communication control unit 56 of the input / output unit 52. Therefore, the input / output unit 52 receives a request from the CPU unit 54 of the logical unit 51. Even if the message is received, the communication control unit 56 cannot return the READY signal to the CPU unit 54.

In this case, the CPU unit 54 of the logic unit 51 cannot shift to the next process until it receives the READY signal. Therefore, in this state, the CPU unit 54 causes the master station and other normal input / output to be performed. Even if the data is received from the units 52 ..., the processing cannot be performed, and the system of the entire slave station actually goes down.

The present invention has been made in view of the above, and an object thereof is even when a power supply failure occurs in an input / output unit 52 among the plurality of input / output units 52 ... Present in the slave station. The logical unit 51 and the other input / output unit 52 provide a highly reliable supervisory control device that operates normally without the entire slave station going down.

[0010]

[Means for Solving the Problems]

 The supervisory control device of the present invention is provided with a slave station that outputs the control signal received from the master station to the supervisory control target equipment and transmits the monitor signal input from the supervisory control target equipment to the master station. A communication unit that controls the communication between the logic unit in which the slave station performs a transmission / reception process with the master station, and a power supply unit that supplies power to the logic unit; and communication between the logic unit, A plurality of input / output units having an input / output unit that outputs a control signal to the supervisory control target facility and inputs a monitor signal from the supervisory control target facility, and a power supply unit that supplies power to the communication control unit and the input / output unit. And a signal line for communication connecting between the logic unit and the plurality of input / output units, and the following means have been taken to solve the above problems. As That.

That is, the slave station includes a power supply line that supplies power from the power supply unit of the logic unit to each communication control unit of the plurality of input / output units.

[0012]

[Action]

 According to the above configuration, the slave station has a logical unit and a plurality of input / output units, and a plurality of input / output units from the power supply unit of the logical unit are provided between these units along with a signal line for communication. They are connected by a power supply line that supplies power to each communication control unit.

If a power supply failure occurs in the input / output unit or a disconnection between the power supply unit and the communication control unit occurs in the input / output unit, the power supply unit included in the input / output unit is included. Although the power supply from the power supply to the communication control unit is stopped, the power is supplied from the power supply unit of the logic unit to the communication control unit via the power supply line, so that the communication control unit can operate.

Therefore, for example, even when the communication control section of the input / output unit in which the power failure has occurred receives a data reception request from the logic section of the logic unit, the communication control section sends the READY signal to the logic section. Since the reply can be sent, the logic part can shift to the next processing, and the operation of the logic part is not affected at all.

Therefore, even if a power failure occurs in an I / O unit among a plurality of I / O units existing in the slave station, the processing of the logic unit of the logic unit does not stagnate and a power failure occurs. Only by stopping the input / output operation of the I / O unit, the other I / O units operate normally, and the situation where the entire slave station goes down the system can be avoided. Therefore, the reliability of the device is improved compared to the past.

[0016]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

As shown in FIG. 2, the monitoring control apparatus according to the present embodiment basically includes a master station 1 and a slave station 2 to which a plurality of equipment devices (monitoring control target equipment) 4 are connected. , And a communication path 3 such as a twisted pair cable or an optical fiber cable for connecting the master station 1 and the slave station 2.

The master station 1 comprises a display unit for displaying monitoring information of the equipment 4, ..., a console for remotely operating the equipment 4, ..., an input / output unit connected to the display or the console, and a micro. A facility device 4 configured by a computer and provided with a logical unit or the like (not shown) for receiving monitoring data from the slave station 2 and transmitting control data to the slave station 2, respectively, and connected to the slave station 10. Remote control and monitoring of….

As shown in FIG. 1, the slave station 2 includes a logic unit 5 for receiving control data (control signal) from the master station and transmitting monitoring data to the master station, and various equipment devices. 4 ... and outputs control data to the equipment 4 ... and inputs monitoring data (monitoring signals) from the equipment 4 ..., and a plurality of input / output units 6 ... And a communication cable 7 for connecting with.

The logic unit 5 includes a CPU section 8 configured by a microcomputer and a power supply section 9 that supplies electric power to the CPU section 8.

The input / output unit 6 includes a communication control unit 10 that controls communication with the logic unit 5 via a communication cable 7, and various input / output units such as a digital input module, an analog input module, or a contact output module. An input / output unit (hereinafter referred to as an I / O unit) 11 including an output module, and a power supply unit 12 that supplies power to the communication control unit 10 and the I / O unit 11 are provided.

The communication cable 7 connecting the logic unit 5 and the input / output unit 6 ... Is connected from the power supply unit 9 of the logic unit 5 together with the signal line 7a for transmitting control data and monitoring data in the cable. Of the I / O units 6 ... Has a power supply line 7b for supplying electric power.

That is, the communication control unit 10 of each input / output unit 6 receives power not only from the power supply unit 12 in each unit but also from the power supply unit 9 of the logic unit 5 via the power supply line 7b of the communication cable 7. Is being supplied.

The operation of the supervisory control device having the above configuration will be described below.

When monitoring data such as analog measurement data is input from the certain equipment 4 to the I / O unit 11 of the input / output unit 6, the I / O unit 11 uses the analog / digital conversion module (not shown) to monitor data. Is converted to digital and then output to the communication control unit 10. The communication control unit 10 transmits the monitoring data to the CPU unit 8 of the logic unit 5 via the signal line 7a of the communication cable 7. The CPU section 8 of the logic unit 51 which has received the monitoring data transmits the monitoring data to the master station 1 via the communication path 3 shown in FIG. 2 after exchanging the monitoring data with a predetermined data format. Then, the master station 1 which has received the monitoring data displays the information according to the monitoring data on the display unit.

In the master station 1, when the operator operates the console and inputs the control data, the logical unit exchanges the control data with a predetermined data format including an address, parity, etc. It is sent to the communication path 3. The control data transmitted from the master station 1 is received by the logic unit 5 (FIG. 1) of the slave station 2 via the communication path 3.

The CPU unit 8 of the logic unit 5 that has received the control data specifies the input / output unit 6 from the address included in the control data, and for the input / output unit 6, sets the signal line 7 a of the communication cable 7 to the input / output unit 6. A data reception request will be sent via this.

On the other hand, the communication control unit 10 of the input / output unit 6 returns a READY signal (operation enable signal) to the CPU unit 8 via the signal line 7 a of the communication cable 7.

When the CPU section 8 receives the READY signal from the communication control section 10 of the input / output unit 6, it sends control data to the input / output unit 6 via the signal line 7 a of the communication cable 7. Become.

In the input / output unit 6, the communication controller 10 receives the control data and outputs it to the I / O unit 11. Then, the I / O unit 11 outputs a signal corresponding to the control data to the equipment 4 (for example, a contact output such as lamp lighting is output as a level or a pulse).

Here, in a certain input / output unit 6, when the power supply unit 12 fails, the power supply from the power supply unit 12 to the communication control unit 10 and the I / O unit 11 is stopped, and the I / O unit 11 is stopped. Does not work. However, since the communication control unit 10 is supplied with power from the power supply unit 9 of the logic unit 5 via the power supply line 7b of the communication cable 7, the operation thereof does not stop. That is, even when the input / output unit 6 in which the power supply unit 12 has a failure receives a data reception request from the CPU unit 8 of the logic unit 5, the communication control unit 10 can return the READY signal. Therefore, the CPU section 8 of the logic unit 5 which has received the READY signal can shift to the next processing, and there is no influence on the operation of the CPU section 8 thereafter.

As described above, the supervisory control device of this embodiment outputs the control data received from the master station 1 to the equipment 4, and sends the surveillance data input from the equipment 4 to the master station 1. The slave station 2 is provided with a slave unit 2, and the slave unit 2 has a CPU unit 8 for performing transmission / reception processing with the master station 1 and a logic unit 5 having a power supply unit 9 for supplying power to the CPU unit 8. And a communication control unit 10 for controlling communication with the logic unit 5, an I / O unit 11 for outputting a control signal to the equipment 4 and inputting a monitoring signal from the equipment 4, and a communication control unit. For communication between the plurality of input / output units 6 having a power supply unit 12 for supplying electric power to the I / O unit 11 and the logic unit 5 and the plurality of input / output units 6 ... Of the logic unit 6 together with the signal line 7a of A communication cable 7 having a power supply line 7b for supplying electric power from the section 9 to the respective communication control sections 10 of the plurality of input / output units 6 ...

As a result, in the input / output unit 6, even if a board failure such as a failure of the power supply section 12 or a disconnection between the power supply section 12 and the communication control section 10 occurs, the communication control section 10 described above is used. Can operate by being supplied with power from the power supply unit 9 of the logic unit 5 via the power supply line 7b of the communication cable 7. Therefore, when a data reception request is received from the CPU unit 8 of the logic unit 5. A READY signal can be returned to the CPU section 8.

Therefore, even if an input / output unit 6 out of the plurality of input / output units 6 existing in the slave station 2 suffers from the power failure as described above, the CPU unit 8 of the logic unit 5 operates. The processing does not stagnate, and only the input / output operation of the input / output unit 6 in which the power supply failure has occurred is stopped, the other input / output units 6 operate normally, and the entire slave station 2 goes down the system. Such a situation is avoided, and the reliability of the device is improved.

The above-mentioned embodiments are intended to clarify the technical contents of the present invention, and should not be construed in a narrow sense by limiting to such specific examples. Various modifications can be implemented within the scope of the request for registration of a new model.

[0036]

[Effect of device]

 As described above, the supervisory control device of the present invention includes the slave station that outputs the control signal received from the master station to the monitoring control target equipment and transmits the monitoring signal input from the supervisory control target equipment to the master station. The slave station communicates between the above logic unit and a logic unit that has a logic unit that performs transmission / reception processing with the master station and a power supply unit that supplies power to this logic unit. Controls the communication control unit, outputs control signals to the monitoring control target equipment, and supplies power to the input / output unit that inputs the monitoring signal from the monitoring control target equipment and the communication control unit and the input / output unit. The slave station further comprises a plurality of input / output units having a power supply unit and a signal line for communication connecting the logic unit and the plurality of input / output units. From the power supply of the logic unit Serial is a configuration in which a power line for supplying power to each communication control unit of the plurality of input-output units.

Therefore, even if a power supply failure occurs in an input / output unit among a plurality of input / output units existing in the slave station, the communication control unit of the input / output unit is not connected to the logical unit via the power supply line. It can be operated by the power supply from the power supply unit, and has a function of returning a READY signal to the logic unit even when a data reception request is received from the logic unit. Therefore, the processing of the above logic section does not become stagnant, the I / O operation of the I / O unit where the power failure occurs is stopped, the other I / O units operate normally, and the entire slave station goes down the system. Since such a situation is avoided, the reliability of the device is improved more than ever before.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a block diagram showing a schematic configuration of a slave station in a supervisory control device.

FIG. 2 is a block diagram showing an overall schematic configuration of the monitoring control device.

FIG. 3 is a block diagram showing a conventional example and showing a schematic configuration of a slave station in a monitoring control device.

[Explanation of symbols]

 1 Master station 2 Slave station 3 Communication path 4 Equipment (monitoring and control target equipment) 5 Logic unit 6 Input / output unit 7 Communication cable 7a Signal line 7b Power supply line 8 CPU section (logic section) 9 Power supply section 10 Communication control section 11 Input Output part 12 Power supply part

Claims (1)

[Scope of utility model registration request] 1. A slave station for outputting a control signal received from a master station to a supervisory control target facility and transmitting a monitor signal input from the supervisory control target facility to the master station, wherein the slave station is , A logic unit having a logic unit that performs transmission / reception processing with the master station, and a power supply unit that supplies power to the logic unit, a communication control unit that controls communication with the logic unit, and a control signal A plurality of input / output units having an input / output unit that outputs a monitoring signal from the monitoring control target facility, and a power supply unit that supplies power to the communication control unit and the input / output unit, In a supervisory control device comprising a communication signal line connecting between the logical unit and the plurality of input / output units, the slave station is configured to connect each of the plurality of input / output units from a power supply unit of the logical unit. Monitoring control device, characterized in that a power supply line for supplying power to the signal controller.