JPS63273943A - Multiple system controller - Google Patents

Abstract

PURPOSE:To avoid the discordance of control parameters and arithmetic results between multiple systems and to improve the reliability of a multiple system controller, by supplying the data received from a control parameter setting/ display device to each process input/output device together with a multiple system selection signal. CONSTITUTION:When a parameter is changed, the changed parameter No. is selected by a digital switch 70 and changed into a binary code to be supplied to the CPU 1 and 2 via the process input/output devices 3 and 4 respectively. A changed parameter No. signal (a) is delivered to a switch circuit 8 via the devices 3 and 4. The circuit 8 selects the signals received from a control system and delivers the selected signal to a display device 71 of a parameter setting/ changing device 7. The binary code is changed into a decimal code and displayed. At the same time, the state change data on the changed parameter is also displayed on a display device 72 via both devices 3 and 4 as well as the circuit 8. When a change request PB 74 is pushed, a parameter changing circuit 10 writes the change data into a memory and at the same time sends the change data to the CPU 2 via a transmitting device 50. A parameter changing circuit 20 writes the change data into a change address.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital control device, and particularly to a multi-system control device suitable for high reliability.

[Conventional technology]

As described in Japanese Patent Application Laid-Open No. 55-37607, conventional devices have been designed to check the calculation data of multiplexed central processing units; The changes made in this case were the same as those for non-multiplexed control equipment.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, when changing control parameters used for calculations in multiplexed central processing units, control parameters are controlled by maintenance devices connected to each of the multiplexed central processing units in the same way as for non-multiplexed central processing units. If the control parameters of only one system are changed while the central processing unit is running, the calculation results will be inconsistent between the multiplexed central processing units. No consideration has been given to changing control parameters, and when all multiplexed central processing units are stopped, control parameters must be changed one system at a time, resulting in a lack of flexibility in maintenance. was there.

An object of the present invention is to simultaneously change control parameters of multiplexed central processing units in multiple systems so that calculation data between the multiplex systems does not become inconsistent when the central processing units are running.

[Means for solving problems]

The above purpose is to provide a control parameter setting/display device common to each central processing unit in addition to a maintenance device connected to each central processing unit, and further provide a control parameter setting/display device for each central processing unit.

This is achieved by providing a communication device for exchanging data between the control parameter changing circuit and the central processing unit, and by inputting data and multiple system selection signals from the control parameter setting/display device to each process input/output device. Ru.

[Effect]

Hereinafter, the present invention will be explained in detail with reference to the control parameter changing circuit in the dual system shown in FIG.

Parameter PJ11 from parameter setting/display device 7
a is input to each central processing unit 1.2 via process input/output devices 3, 4. A parameter changing circuit 10.20 in the central processing unit 1.2 reads out parameter data corresponding to the parameter Nα and outputs it to the switching circuit 8 via each process input/output device 3, 4. The switching circuit 8 selects parameter data on the side of the central processing unit that is controlling, and the parameter setting/display circuit 7 displays the data. When changing the parameters here, when the change data is set and a change request is made, the change data b and change request signal C are sent from the parameter setting/display circuit 7 to the process input/output bag! 3, 4 to each central processing unit 1
, 2. Central processing unit! In the parameter change circuit 10゜20 in 1.2, if the own system is a control system, the change data b is stored in the corresponding parameter area,
Thereafter, these parameters are read out and transmitted to the standby central processing unit via the inter-central processing unit communication devices 5 and 6. On the other hand, the standby system does not use the change data b input from the process input/output device, but uses the communication device 5,
The control system parameter data input via 6 is stored in the parameter area.

The operation of the parameter changing circuits 10 and 20 at this time will be explained with reference to the parameter changing circuit flowchart of FIG.

In step A, data b corresponding to parameter &a from the parameter display/setting device is constantly displayed on the parameter setting/display circuit. In step B, change request signal C
The process is selected depending on the presence or absence of the change request signal C. If there is no change request signal C, the process of the parameter change circuit is terminated, and if the change request signal is present, the process proceeds to step C. In step C, processing is selected depending on whether the own system is a control system or a standby system. If it is a control system, the parameter area change data b is stored in step D, and the data read from the parameter area is read out in step E. Central processing unit communication device 5,
6 to the standby system, and the processing of the parameter changing circuit is completed.

On the other hand, in the case of a standby system, the data transmitted via the communication device 5.6 between central processing units is fetched in step F, and the parameter data e from the control system is stored in the parameter area in step G. Finish the processing of the changed circuit.

With this, the process input/output device i of the multi-system control device
! It becomes possible to change the same data simultaneously while online, regardless of the errors in 3 and 4.

〔Example〕

A preferred example of the present invention is a dual system in electronic turbine governor control. This embodiment is shown in FIG. In this embodiment, serial transmission devices 50 and 60 are used as communication devices 5 and 6 between central processing units. The parameter setting/changing device also includes a digital 5W 70 for selecting the change parameter Nα, and a digital display 71 for displaying the selected parameter. A display instrument 72 that displays the current state and changed data, a potentiometer 73 that sets changed data, and a change request P that issues a change request instruction.
It is composed of B74.

When changing a parameter, first select the change parameter h using the digital 5W70. digital 5w70
Then, the parameter Na is converted into a binary code and input as a changed parameter signal a to the respective central processing units 1 and 2 via the process input/output devices 3 and 4.

The input change parameter Nα signal a is checked to see if it has been registered, and is output as a pinary code to the switching circuit 8 via the process input/output devices 3 and 4. The switching circuit 8 selects the signal from the control system and outputs it to the digital display 71 of the parameter setting/changing device 7, where the binary code is converted into decimal and displayed as a changed parameter value. At the same time, the current data of the selected change parameter is similarly displayed on the display instrument 72 via the process input/output device 3.4 and the switching circuit 8.

Next, the data that you want to change is inputted as change data b from the process input/output bags [3 and 4] by operating the potentiometer 73, and is converted by the central processing units 1 and 2 and changed to the process input/output bag in the same way as the current data. ! 3.4 and the switching circuit 8, the control system data is displayed on the display instrument 72. Up to this point, both the control system and the standby system operate in the same way. From now on, for convenience, the central processing unit of the control system will be explained as 1.

As described above, by pressing the change request PB74 after setting the change parameter and change data, the parameter change circuit 10 of the central processing unit 1, which is a control system, stores the change data b into the memory of the selected parameter. writing,
The changed address and changed data are read and transmitted to the standby system via the serial transmission device 5. On the other hand, the parameter change circuit 20 of the central processing unit 2, which is a standby system, receives the change address and change data from the control system via the serial transmission device 6, and writes the change data to the change address.

According to this embodiment, it is possible to change the parameters of multiple systems simultaneously in the running state of the multiple system controllers, thereby preventing discrepancies in the parameters and calculation results of the multiple system controllers, thereby improving the reliability of the multiple system controllers. This has the effect of making it easier to change parameters. Furthermore, digital SW・
By employing a display, it is possible to display and set a large number of parameters (the number that can be represented by the digital SW/display).

〔Effect of the invention〕

According to the present invention, it is possible to change the control parameters of a multiple system control device to the same data for multiple systems at the same time while the control device is running. In addition to improving the reliability of the control device, maintenance is facilitated because control parameters can be changed without stopping the control device.

Further, if there is a distinction between a control system and a standby system, it can be similarly applied to a triple system control device.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a flowchart of a parameter changing circuit which is the main circuit of the present invention, and FIG. 3 is a diagram of a specific embodiment. 1.2... Central processing unit, 3, 4... Process input/output device, 5, 6... Communication device between central processing units, 7...
・Parameter setting/display device, 8...Switching circuit, 10
゜Figure 1 Figure 2

Claims (1)

[Claims] 1. Multiplexed central processing units, multiplexed process input/output devices corresponding to the central processing units, and multiplexed control operated by the outputs of the multiplexed process input/output devices. means, a multiplexed changeover switch provided on each output side of the control means, one of which is turned on, a controlled object system controlled by the output of the changeover switch, and a controlled object system of the controlled object system. A detection means for detecting a state associated with control and outputting a state signal is provided, and each multiplexed central control device, process input/output device, and control means before and after the changeover switch are always in a running state in parallel. At the same time, the input/output signal of the changeover switch and the status signal from the detection means are fed back to the central processing unit via the process input/output device, and based on the fed back signals, the central processing unit In a multi-system control device that performs an operation check and controls the switching of the changeover switch according to the result, the central processing unit can control the control parameters used by the central processing unit during calculations in a running state and once. A multi-system control device characterized by having a function of changing the same data in multiple central processing units at the same time by operation.