JPH0514964A - Plant simulation device - Google Patents

Abstract

PURPOSE:To execute a plant simulation without performing an address conversion. CONSTITUTION:Data obtained from a PIO 10 is transmitted to each STN 1 to 4 via a process data controller 15. Normally, at the time of controlling, a PC 11 reads this data. At the time of performing a simulation, a plant simulator 12 processes this data and outputs only the information necessary for the simulation. The process data controller 15 forms simulation data by synthesizing this information and the information from the PIO 10 and the data is given to the PC 11 via a STN 3. As a result, the simulation is to be performed without changing the storage address of data and the effective utilization of a common memory regarding to each STN is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant simulation device used for adjusting and maintaining a plant control system using a data transmission device.

[0002]

2. Description of the Related Art Conventionally, a plant simulation device has been used for adjusting and maintaining a plant control system. The plant simulation device is provided with a data transmission device on a data way which is, for example, a ring-shaped transmission line, one of the data transmission devices is a simulator, the other one is a process input / output device, and the other one is a data transmission device. It is configured by connecting each plant controller individually. In this case, the simulator generates simulation data based on the data obtained from the process input / output device, and the plant controller executes the plant simulation according to the simulation data. FIG. 3 shows the configuration of a plant simulation apparatus according to a conventional example. The device shown in this figure is, for example, the device described in JP-A-61-289403. 1, 2, 3 and 4 in this figure
Are data transfer devices (hereinafter referred to as STNs). Address converters 5 to 5 are provided for each STN 1 to 4, respectively.
8 is connected. The address translation device 5 has a control computer (hereinafter referred to as CPU) 9, the address translation device 6 has a process input / output device (hereafter referred to as PIO) 10, and the address translation device 7 has a plant controller (hereinafter PC).
11), and the plant simulator 12 is connected to the address translator 8. Also, each S
The TN1 to TN4 are connected in a ring shape by a dataway 14, and the PIO 10 is connected to a process state detecting / driving device 13.

In the process state detecting / driving device 13, the process state of the plant is observed, and the data obtained by the observation is supplied to the PIO 10. The data supplied to the PIO 10 is transferred to the STN via the address translation device 6.
2 to the other STs via the dataway 14.
N1, 3, 4 is supplied. Each of the STNs 1 to 4 has a common memory to which a common address is given, and the write destination of this common memory is switched and set by the address conversion device 6. In this way each STN1
The data supplied to 4 to 4 correspond to corresponding devices (for example, ST
If it is N1, it is used by the CPU 9) to execute a predetermined operation. For example, the CPU 9 performs necessary control calculation based on the transmitted data, the simulator 12 generates simulated data, the PC 11 performs process control or its simulation, and the PIO 10 is included in the process state detecting / driving device 13. The drive device to be controlled is driven.

Next, the operation of this conventional example will be described along the flow of data transmission.

FIG. 4 shows a data flow in this conventional example.

First, when the device according to this conventional example is performing normal control, the data obtained from the PIO 10 is stored in the address A on the common memory of the STN 2 via the address conversion device 6. The data written at the address A on the common memory is the data way 14
Is transmitted to each STN 3 and 4 via. The data to be transmitted is stored at the same address A on this common memory also in each STN 3 and 4. As shown in the figure,
The PC 11 takes in data from the address A on the common memory of the STN 3 via the address translation device 7 and uses this data to execute a predetermined operation.

Further, when a plant simulation is carried out by the device of this conventional example, the following operation is performed. First, the data output from the PIO 10 is written in the common memory of the STN 2 via the address translation device 6. At this time, the write address is switched by the address translation device 6 and set to B. STN2
The data stored at address B on the common memory of
It is stored in the address B on the common memory of the STN 4 via the data way 14, and the plant simulator 12 takes in the data from this address. The plant simulator 12 processes this data to generate simulated data, and writes the simulated data in the address A on the common memory of the corresponding STN 4. This data is sent via the data way 14 to the address A on the common memory of STN3.
Is stored in the PC 11, and the PC 11 takes in this data via the address translation device 7 and performs necessary processing.

[0008]

However, the conventional plant simulation apparatus has a problem that the apparatus configuration becomes complicated because an address translation apparatus is required for each STN. Further, since the data output from the plant simulator is directly transmitted to the PC, the data not directly related to the simulation is also input / output at the same time, and there is a problem that the recording area of the STN common memory becomes insufficient. It was happening.

The present invention has been made to solve the above-mentioned problems, and it is possible to execute a plant simulation without performing address conversion, and the size of output data from a plant simulator. It is an object of the present invention to provide a plant simulation device that can reduce the power consumption.

[0010]

In order to achieve such an object, according to the present invention, a plant simulator outputs information necessary for simulation out of data from a process state detecting / driving device as simulated data, and The simulation device includes a process data controller that is interposed between the PIO and the STN, generates data from data from the process state detecting / driving device and simulation data output from the plant simulator during simulation, and supplies the data to the PC as simulation data. It is characterized by

[0011]

In the present invention, the information required for the simulation is output from the plant simulator, and this is taken into the process data controller. The process data controller puts this together with the data from the process state detecting / driving device and supplies it as simulated data to the PC (via the STN). In other words, it is not necessary to supply the data from the PIO to each STN by changing the write address, and the plant simulator can
It is not necessary to give all simulated data to the TN during simulation. As a result, the plant simulation is performed without using the address translation device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

The same components as those of the conventional example shown in FIGS. 3 and 4 are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 shows the configuration of a plant simulation apparatus according to an embodiment of the present invention. Unlike the conventional device, the device shown in this figure has each STN1 to
No address translation devices 5 to 8 are provided between the device 4 and the corresponding device. That is, the STN 1 sends the CPU 9 S
The TN 3 is directly connected to the PC 11, and the STN 4 is directly connected to the plant simulator 12. Also, STN2
Between the PIO 10 and the PIO 10, a process data controller 15 is provided instead of the address translation device 6.

In this embodiment, the data supplied from the process state detection / drive unit 13 to the PIO 10 is
It is supplied to the STN 2 via the process data controller 15. The data supplied to the STN 2 is supplied to the STNs 1, 3 and 4 via the data way 14. Each ST
The data supplied to N1, 3 and 4 are CPU9 and PC1.
1, used by the plant simulator 12.
The data supplied to the STN 2 of the necessary processing is given to the PIO 10 via the process data controller 15, and the PIO 10 drives the drive device included in the process state detection / drive device 13 as a control target.

Next, the operation of this embodiment will be described. FIG. 2 shows the flow of data transmission in this embodiment.

First, during normal control, the data obtained from the PIO 10 is stored in the address A on the common memory of the STN 2 via the process data controller 15. This data is transmitted to and stored in the address A on the common memories of the STNs 3 and 4 via the data way 14. PC11 is address A on the common memory of STN3
Data is read and a predetermined operation is executed based on this data.

When the simulation is performed, the data obtained from the PIO 10 is stored in the address A on the common memory of the STN 2 via the process data controller 15. This data is stored in the address A on the common memory of the STN 4 via the data way 14 as in the normal control. Plant simulator 1
2 is the address A on the common memory of the corresponding STN4
Data is taken in and processed to generate simulated data. However, unlike the simulated data generated by the plant simulator 12 in the conventional example, the simulated data generated by the plant simulator 12 in this embodiment is only the data necessary for the simulation. That is, the plant simulator 12 reads the data of the address A, determines what should be simulated, and collects only the necessary bit information in STN4.
Stored at address B in the common memory of The data of the address B is stored in the address B on the common memory of the STN 2 via the data way 14. This data is fetched by the process data controller 15. The process data controller 15 synthesizes the data relating to the address B and the data from the PIO 10 and stores this as new simulated data at the address A on the common memory of the STN 2. For example, each bit of the data related to the address B is shifted to the corresponding portion of the data from the PIO 10 and the exclusive OR is performed to generate the simulated data. This simulated data is transmitted to and stored in the address A on the common memory of the STN 3 via the data way 14. The PC 11 fetches the simulated data from the address A on the common memory of the STN 3 and executes the simulation operation based on this.

[0019]

As described above, according to the present invention,
The plant simulator generates simulated data only for the information necessary for the simulation, and the simulated data and P
Since the process data controller synthesizes data etc. from IO to generate simulated data to be given to the PC, the output data from the plant simulator can be small and the storage area of each STN can be used more effectively. it can. Further, since it is not necessary to perform address conversion, simplification of the device is realized and a more economical plant simulation device can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a plant simulation apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a data flow in this embodiment.

FIG. 3 is a block diagram showing a configuration of a plant simulation apparatus according to a conventional example.

FIG. 4 is a diagram showing a data flow in this conventional example.

[Explanation of symbols]

 1, 2, 3, 4 Data transmission device (STN) 9 Control computer (CPU) 10 Process input / output device (PIO) 11 Plant controller (PC) 12 Plant simulator 13 Process state detection / driving device 14 Data way 15 Process data controller

Claims (1)

Claim: What is claimed is: 1. A plurality of data transmission devices, each having a common memory provided with a common address for storing data to be exchanged with each other, connected to each other via a dataway to exchange data with each other. And a process input / output device which is connected to at least one of the plurality of data transmission devices and takes in data from the process state detecting / driving device while supplying control data to the process state detecting / driving device to drive the process state detecting / driving device. A plant simulator which is connected to another one of the transmission devices and takes in the data from the process state detection / driving device transmitted through the dataway when simulating the plant and generates simulated data,
In a plant simulation device equipped with a plant controller that controls the plant during normal control and that takes in simulated data during simulation and executes the simulation of the plant, the plant simulator provides information necessary for the simulation from the data from the process state detection / drive device. Is output as simulation data, and the plant simulation device intervenes between the process input / output device and the data transmission device and generates data from the process state detection / drive device data and the simulation data output from the plant simulator during simulation. A plant simulation device comprising a process data controller that supplies the plant controller with simulated data.