JPH08185203A - Simulation method for control system - Google Patents

Abstract

PURPOSE: To facilitate the structuring of the system and easily cope with the addition and alteration of i/q, etc., by interposing a simulator between the arithmetic control part and i/q part of the control system and providing the simulator with a selecting means. CONSTITUTION: The simulator 20 is installed between the plant control part 10 which controls the i/q part 30 connecting with various plants and the i/q part 30, and the i/q control part of the simulator 20 is connected to the i/q control part of the plant control part 10 and the i/q part 30 to perform various simulating operations. At the time of the simulation, switching function parts S1-S5 and contact function parts C1 and C2 enters the state shown in the figure. The operation output from the PiD control function part 2 of the plant control part 10 is inputted to the primary linear approximating function part 5 of the simulator 20 through a transmission line 50 and primary linear approximating operation is performed here; after certain idle time operation is performed at an idle time arithmetic part 6, the output is returned to the PiD control function part 2 of the plant control part 10 through the transmission line 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simulation method capable of smoothly and efficiently and highly reliable in-plant debugging and on-site test operation adjustment of a control system or controller of various manufacturing plants. .

[0002]

2. Description of the Related Art Conventionally, this type of simulation method has been realized by (1) a system in which hard wiring is connected outside the input / output (i / o) portion. (2) A logic close to the actual plant is constructed by the control logic that coexists with the software of the execution system inside the control system. Etc. are known.

[0003]

However, in the above method (1), system construction by hard wiring is complicated, and addition and change are not always easy.
In a control system in which thousands of i / o are connected to one controller to perform control, the complexity becomes more remarkable. Further, with the method (2), it is difficult to control the interference of the operation with the software of the execution system, and the simulator on / off causes a minute difference in the operation cycle of the execution system. Alternatively, there is a problem that the simulation cannot be said to be the function confirmation means equivalent to the actual i / o use due to the fact that the basic system function route is different from the actual one due to i / o non-use + soft bypass. . Therefore, an object of the present invention is to provide a simulation method in which system construction is easy and additions and changes can be easily dealt with.

[0004]

In order to solve such a problem, according to the present invention, a simulator for performing a simulation operation is provided between the input / output control unit and a plurality of input / output units of the plant control system with a transmission line. The simulator is provided with selection means for selecting whether to connect the input / output control unit of the plant control system to the simulator or the input / output unit, and selectively execute control and simulation of the plant. The feature is that it is possible.

[0005]

The simulator is provided between the arithmetic control unit and the i / o unit of the control system, and the simulator is provided with selecting means. By selecting the system control unit side by the selecting means, the simulation can be executed. The system construction will be facilitated so that additions and changes such as i / o can be dealt with easily.

[0006]

1 is a block diagram showing an embodiment of the present invention, FIG.
FIG. 1 is a schematic configuration diagram showing an entire system to which the present invention is applied. First, FIG. 2 will be described. In FIG. 2, 10
Is a plant control unit, 20 is a simulator, 30 is i / o
Reference numeral 40 denotes various plants, and 50 denotes a transmission line. Further, reference numerals 11 and 21 denote control arithmetic units (MPU), 12, 22,
Reference numeral 23 is an i / o control unit (TLC, TSH).

That is, as shown in FIG. 2, a simulator 20 is installed between the plant control section 10 for controlling the i / o section 30 connected to various plants 40 and the i / o section 30. The i / o control unit 22 of the simulator 20 is connected to the i / o control unit 12 of the plant control unit 10, while the i / o control unit 23 of the simulator 20 is connected to the i / o unit 3
It is connected to 0 to perform various simulation operations.

FIG. 1 shows a detailed example of the simulator 2. Here, reference numeral 1 of the plant control unit 10
Is an indicator function unit, 2 is a PiD control function unit, 3 is a shutoff valve logic function unit, and reference numeral 4 of the simulator 20
A and 4B are internal memory constant setting units, 5 is a linear linear approximation function unit, 6 is a dead time operation unit, 7 is an off-delay timer function unit, 8 is a logical operation (negative operation: NOT) function unit, S1 to S1. S5 is a switching function unit, and C1 and C2 are contact function units, respectively.

Switching function sections S1 to S5 and contact function section C
Reference symbols 1 and C2 indicate simulation times in the illustrated state. Also, although these are shown as an image of hardware, they are actually realized by software. For example, if a memory constant is set from the setting unit 4A of the simulator 20, the plant control unit 1 will pass through the transmission line 50.
0 is applied to the indicator function unit 1 and displayed.

The operation output from the PiD control function unit 2 of the plant control unit 10 is input to the first-order linear approximation function unit 5 of the simulator 20 via the transmission line 50, where the first-order linear approximation operation is performed and the dead time is lost. The arithmetic unit 6 operates for a certain dead time and then returns to the PiD control function unit 2 of the plant control unit 10 via the transmission line 50.

Further, the "open command" output from the shut-off valve logic function unit 3 of the plant control unit 10 is input to the off-delay timer function unit 7 of the simulator 20 via the transmission line 50, where it is delayed for a predetermined time. Later switching function section S
4, it is configured to return to the shutoff valve logic function unit 3 of the plant control unit 10 via the transmission line 50.

Here, in the case of using the actual process signal or outputting the signal to the actual process, it is realized by turning on the switching function unit and the contact function unit of each signal one point (reverse state to that shown in the drawing). For example, in order to input a signal to the process in the indicator function unit 1, the switching function unit S1 is switched to a state opposite to that shown, and the signal from the i / o unit 30 is received by the simulator 20 via the transmission line 50. It is directly input to the plant control unit 10 via the transmission line 50.

When outputting the operation output from the PiD control function unit 2 to the actual process, the contact C1 is turned on,
Output to the i / o unit 30 via the transmission line 50. Further, when the "open command" output from the shutoff valve logic function unit 3 is output to the actual process, the contact C2 is turned on and output to the i / o unit 30 via the transmission line 50. When the process signal is input to the shutoff valve logic function unit 3 without using the output of the off-delay timer function unit 7 of the simulator 20, the switching function unit S4 is switched to transmit the signal from the i / o unit 30 to the transmission line 50. Then, it is received by the simulator 20 and input as it is to the plant control unit 10 via the transmission line 50.

[0014]

According to the present invention, the transmission line is switched so that the simulator can be connected. Therefore, in-plant debugging and on-site test run adjustment of control systems for various manufacturing plants can be performed smoothly and efficiently with high reliability. The advantage is that it can be realized with certainty. Further, for a plant in which various systems in the facility are sequentially started up, it is extremely useful because it is possible to check the operation logic while sequentially starting up the system.

Particularly, for a system in which thousands of i / o are connected to one controller for control,
The fact that a simulator can be constructed by connecting a transmission line to a part closer to i / o, and that it is possible to simplify the simulation while making the most of its signals for a system that has a control panel relationship realized by hardware Very useful for internal debugging and on-site commissioning adjustment. From the viewpoint of the reliability of the control system, it is desirable to switch the transmission line and return it to the normal system form at the completion of debugging or trial run.

[Brief description of drawings]

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

FIG. 2 is a schematic configuration diagram showing an entire system to which the present invention is applied.

[Explanation of symbols]

1 ... Indicator function part, 2 ... PiD control function part, 3 ... Shutoff valve logic function part, 4A, 4B ... Internal memory constant setting part,
5 ... First-order linear approximation function part, 6 ... Dead time calculation part, 7 ... Off-delay timer function part, 8 ... Logical operation function part, S1-
S5 ... Switching function unit, C1, C2 ... Contact function unit, 10 ... Plant control unit 11, 21 ... Control calculation unit, 12, 22,
23 ... Input / output (i / o) control unit, 20 ... Simulator,
30 ... i / o section, 40 ... various plants, 50 ... transmission line.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshitomo Takeuchi 1-1 Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd. (72) Keiji Ishibashi 1 Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa No. 1 in Fuji Electric Co., Ltd. (72) Inventor Yasuo Masuda 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Inside Kawasaki Steel Co., Ltd. (72) Inventor Zenji Fujiwara 1 Kawasaki-cho, Chuo-ku, Chiba-shi Kawasaki Steel Co., Ltd.Chiba Works

Claims (1)

[Claims] 1. A simulator for performing a simulation operation is connected between an input / output control unit and a plurality of input / output units of a plant control system via a transmission line, and
It is characterized in that the simulator is provided with selection means for selecting whether the input / output control unit of the plant control system is connected to the simulator or the input / output unit, thereby making it possible to selectively execute plant control and simulation. Control system simulation method.