JPH0578087U - Distributed control system - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The plant control sequence can be reserved from the host computer to the control station without being restricted by its state, and processing according to the request of the host computer is possible. To be able to [Construction] A gateway device GW is provided for connecting the upper computer device CP to a communication line to which the control stations FC1 and FC2 are connected, and a plant control sequence file 11 and a file 11 are provided in the device GW.
Means 12 for setting operation parameters in the
Means 13 for downloading to the control station side,
A downloaded sequence control unit 14, a unit 15 for uploading a sequence that has been executed, a executed plant control sequence file 16, and an actual data collection unit 17 for the same file are provided. The command operates each unit of the gateway device to operate the plant.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a distributed control system including a control station that executes control calculation and sequence control calculation of distributedly arranged processes, and an operator station that performs control operation and monitoring of the entire plant. More specifically, the present invention relates to a distributed control system that enables a higher-order computer device to reserve a control station via a gateway device and perform processing according to the request of the higher-order computer device.

[0002]

[Prior Art]

 Distributed control systems, which were developed with the aim of decentralizing control and concentrating information, are currently used as the mainstream of control / operation of processes (plants) in all industries. In such a distributed control system, control calculation processing is performed in each distributed control station, and various information management and plant monitoring are performed in the operator station. An integrated general-purpose computer system that enables connection of a higher-level general-purpose computer device to a distributed control system (DCS) and that can read and set various data handled by the control station from this higher-level computer device is also desired. ing.

In this case, a higher-level computer device is connected to a communication line to which the control station is connected via a gateway device so that communication can be performed between them. ..

[0004]

[Problems to be solved by the device]

 In the conventional apparatus, even when a higher-order computer apparatus is connected, the higher-order computer apparatus is insufficient to read and refer to the data handled by the control station and set the data.

The present invention has been made in view of the above circumstances, and it is possible to dynamically support various control functions from a host computer device for a plant which is already controlled by a control station. The purpose is to provide a distributed control system that can be used.

[0006]

[Means for Solving the Problems]

 The present invention, which achieves such an object, is composed of a control station that executes control calculation and sequence control calculation of distributedly arranged processes, and an operator station that performs control operation and monitoring of the entire plant. In the distributed control system, an upper computer device and a gateway device for connecting the upper computer device to a communication line to which the control station is connected are provided, and the gateway device is connected to the control device. A plant control sequence file that stores the operation information of the existing plant, parameter setting means that sets the operation parameters in this plant control sequence file, and download means that downloads the plant control sequence file to the control station side. Sequence control means for controlling the downloaded plant control sequence, upload means for uploading the plant control sequence that the control station has finished executing, executed plant control sequence file for storing the operation executed information uploaded by this upload means, A plant for operating the plant by providing a data collection means for collecting the actual data of the executed plant control sequence file, and operating each means of the gateway device by the command of the communication packet to the higher-level computer device. This is a distributed control system characterized by being provided with operating means.

[0007]

[Action]

 The host computer sends a communication packet command to the gateway device by operating means and operates each means of the gateway device to set operating parameters in the plant control sequence file and control this sequence information. Download to the side.

With this, the higher-level computer device can perform dynamic plant control through the control station by command operation of the communication packet.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration block diagram showing an embodiment of the present invention. In the figure, FC1 and FC2 are a plurality of distributed control stations that execute process control operations and sequence control operations, and OPS is an operator station that monitors and operates the plant, and these are control system LANs. They are connected to each other via the line BS1. CP is a high-order computer device and is connected to a general-purpose communication line BS0. The GW is a gateway device for connecting the host computer device CP to the communication line BS1.

The PLT is a block conceptually showing a plant controlled by the control station FC, and is equipped with a large number of sensors and actuators. In the gateway device GW, 11 is a plant control sequence file that stores operating information of the plant that the control station FC is performing, 12 is a parameter setting means that sets operating parameters in the plant control sequence file 11, and 13 is a plant control sequence file. 11 is a download means for downloading 11 to the control station FC side via the communication line BS1. Reference numeral 14 is a sequence control means for controlling the downloaded plant control sequence, and 15 is upload means for uploading the plant control sequence that the control station FC has finished executing, via the communication line BS1.

Reference numeral 16 is an executed plant control sequence file for storing the operation executed information uploaded by the upload means 15, and 17 is a data collecting means for collecting the actual data of the executed plant control sequence file 16. The obtained data can be referred to by the upper computer device CP.

In the higher-level computer device CP, 21 is a plant operating means for operating each means of the gateway device GW by a command of a communication packet. In the operator station OPS, 31 is a CRT and 32 is a keyboard, and these are normally used for controlling operation of the plant. A data collection means 33 collects data handled by the control stations FC1 and FC2 via the communication line BS1 so that the plant can be monitored.

In the control station FC, 41 is a sequence interpreting means for interpreting the plant control sequence downloaded from the gateway device GW, and 42 is actually controlling the plant based on the interpreted sequence control information. The plant control sequence means to be executed is configured to input signals from various sensors installed in the plant PLT, calculate control output based on the downloaded sequence information, and output it to the actuator. is there.

FIG. 2 is a block diagram showing the hardware of the gateway device GW. Microprocessor MPU, random access memory RAM, read-only memory ROM, control system LAN control circuit for interfacing with control system communication line BS1, interface with general-purpose communication line (LAN) BS 0 connected to a higher-level computer device CP It is configured by a LAN control circuit, a disk device control circuit, and the like.

FIG. 3 is a functional block diagram showing a software configuration of the gateway device GW. General-purpose LAN communication control function I / F1 for communicating with the host computer CP, control system LAN communication control function I / F2 for communicating with the control station FC via the control system LANBS1, and managing these two functions It also comprises a plant control sequence program 10 for monitoring the plant control. Here, the plant control sequence program 10 realizes each means shown in FIG. 1, and also stores a plant control sequence file 11 created for each brand produced in the plant and a processing result executed by the control station FC. The executed plant control sequence file 16 stored in the file can be accessed.

The plant control sequence file 11 stores operating parameters for execution in the control station FC, and the executed plant control sequence file 16 stores data of execution results and control sequences.

The operation of the apparatus thus configured will be described below. FIG. 4 is a conceptual diagram showing an outline of the operation. First, the upper-level computer device CP selects a plant sequence that matches the product and issues an operation parameter setting request to the selected plant sequence. In response to this, the parameter setting means 12 of the gateway device GW writes the operation parameter in the requested plant control sequence file 11 as shown in. Then, the host computer CP makes a download request as shown in, and the download means 13 sends the plant control sequence information in which the operation parameter is written as shown in to the control station based on this request. Download to FC side.

Next, the host computer CP requests the execution control of the downloaded plant control sequence as shown in. In response to this request, the sequence control means 14 in the gateway device GW controls the operation of the plant control sequence of the control station FC as shown in. Based on this operation control, the control station FC takes charge of sending the control output to the plant PLT and controlling the plant.

The executed plant control sequence is automatically uploaded by the upload means 15 of the gateway device GW as shown in, and stored in the executed plant control sequence file 16 ().

The host computer CP requests the data collecting means 17 to collect the actual data of the plant control sequence that has been executed, and the data collecting means 17 that has received the request makes the plant control sequence The corresponding actual result data is read from the executed plant control sequence file 16 in which the execution result of (1) is stored, and the result data is returned to the host computer CP side.

Here, the instruction from the high-order computer device CP to the gateway device GW is performed by sending a command of a communication packet by the operation means 21 and operating each means of the gateway device GW. As a result, the higher-level computer device CP can perform dynamic plant control by command operation of a communication packet via the gateway device GW and the control station FC.

[0022]

[Effect of the device]

 As described in detail above, according to the present invention, in plant control, a host computer can reserve a plant control sequence in a control station without being constrained by its state to a control station. Therefore, processing can be performed according to the request of the host computer. As a result, the plant control can be performed under the initiative of the host computer device, and the DCS and the host computer device can be integrated.

[Brief description of drawings]

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

FIG. 2 is a configuration block diagram showing hardware of a gateway device GW.

FIG. 3 is a functional block diagram showing a software configuration of a gateway device GW.

FIG. 4 is a conceptual diagram showing an outline of operation.

[Explanation of symbols]

 FC1, FC2 Control station OPS Operator station CP Host computer device BS0 General-purpose communication line GW Gateway device PL plant 11 Plant control sequence file 12 Parameter setting means 13 Downloading means 14 Sequence control means 15 Uploading means 16 Executed plant control sequence file 17 Data collection Means 21 Plant operating means 31 CRT 32 Keyboard 33 Data collecting means 41 Sequence interpreting means 42 Plant control sequence means

Claims (1)

[Scope of utility model registration request] 1. A control station for executing control calculation, sequence control calculation, etc. of distributedly arranged processes,
In a distributed control system consisting of an operator station that performs control operation and monitoring of the entire plant, in order to connect the upper computer device and this upper computer device to the communication line to which the control station is connected, A gateway device is provided, and in the gateway device, a plant control sequence file storing operation information of the plant that the control station is performing, parameter setting means for setting operation parameters in the plant control sequence file, and the plant control sequence Download means for downloading the file to the control station side, sequence control means for controlling the downloaded plant control sequence, and plant control sequence that the control station has finished executing. An uploading means for uploading the data, an executed plant control sequence file for storing the operation executed information uploaded by the uploading means, and a data collecting means for collecting the actual data of the executed plant control sequence file. The distributed control system is characterized in that the computer device is provided with plant operation means for operating the plant by operating each means of the gateway device by a command of a communication packet.