JP2859899B2 - Multiplex controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a multiplexing control device that makes a control program of each controller identical in a multiplexed digital controller.

(Prior Art) In a nuclear power plant or the like, in order to achieve high reliability, a configuration in which a control device is tripled is adopted.

FIG. 2 shows an example of a control device employing a triple configuration according to the prior art. A system controller 1 in control device 100
A and B controller 1B and C controller 1C
Perform the same processing and select the respective results
Output to When the selection circuit 2 outputs an analog signal,
Processing such as selection of an intermediate value or calculation of an average value is performed, and a control signal is output. In the case of a contact signal output, a majority operation (2/3 operation) is performed and a control signal is output. The signal transmission lines l _ab , l _bc , and l _ca are provided for data communication between the A-system, B-system, and C-system controllers, and a multiplex transmission line is used.

In this configuration, the control on the apparatus 100 inputs an external signal S ₁ and S _2, to select one of the signals either on the conditions of its two signals, when using the selected signal to the internal operation of the controller The prior art will be described.

FIG. 3 is a diagram showing an example of a two-signal input selection circuit in a triple control device. External signal S ₁ is inputted from the input point i ₁ of the A-system controller 1A to the inside. A system controller 1A input external signals S ₁ output point O _1, O ₂ from the signal transmission line l _ca, respectively via the l _ab C system in the controller
To input point i _{2 of} 1C and input point i ₃ of B-system controller 1B.
Is input to

Similarly, the external signal S ₂ is applied to the input point i _{1 of the} B-system controller 1B.
From the output points O ₁ and O ₂ , and the signal transmission lines l _ab , l _bc ,
To the input point i ₂ of the A-system controller 1A via
Further, inputted to the input point i ₃ of C-system controller 1C. C
The input point i ₁ of the system controller 1C, nothing is not input, the value of the C system the same manner as described above B system, is transmitted to the A-system controller.

The relationship between input points and input signals in each of these controllers is as shown in FIG. For example, the external signals S ₁ to be selected in each controller the input point i ₁ is the A-system controller, in the B-system controller the input point i _3, it is necessary to select the input point i ₂ is C-system controller.

In (problem to be solved by the invention) Figure 3, selects the external signal S _1, when the use that signal to the internal operation of the controller, a signal of i ₁ is the A-system controller, in the B-system controller The signal of i ₃ must be selected, and the signal of i ₂ must be selected in the C-system controller.

Basically, since the internal operation of each system controller is a triple system, the same processing is basically performed. However, in the circuit configuration shown in FIG. 3, since only a part of the input selection circuits is different, programs for the A system, the B system, and the C system must be prepared. This means that three programs must be changed even when the program of the common part is changed, which complicates the management of the programs and causes errors easily.

On the other hand, as shown in FIG. 5, together both with the external signals S ₁ and S _2, respectively A system, B system, but configurations are contemplated to be input to the C-based controller, Then, the third diagram configuration In this case, the input point of the external signal must be twice as large as that of the above, the input configuration of each controller becomes complicated, and the number of wirings in the panel increases. In this regard, in the case of the configuration of FIG. 3, since the signal transmission lines l _ab , l _bc , and l _ca between the controllers can employ multiplex transmission lines, the number of wirings in the panel is small, and the input configuration of each controller is also small. Is also easier. For this reason, conventionally, it has been desired to solve the problems inherent in the basic configuration shown in FIG.

Therefore, an object of the present invention is to simplify program management by integrating these programs even if the internal processing of each controller of the A system, the B system, and the C system is partially different.

[Structure of the Invention] (Means for Solving the Problems) A plurality of controllers that input an external signal from a control target and perform arithmetic processing by the same control program, and process the outputs from the plurality of controllers to perform the control. In a multiplexing control device including a selection circuit that outputs a control signal to an object, each of the plurality of controllers includes an input selection circuit, an input selection program unit, and a controller recognition unit.

The input selection circuit selects and outputs a signal from any one of an external signal input point for directly inputting the external signal and an external signal input point for inputting the external signal via another controller.

The input selection program means controls the input selection circuit to select an input signal from the external signal input point when the external signal is directly input so that the multiplexed controllers have the same program. An input processing program for controlling the input selection circuit so as to select an input signal from the external signal input point when inputting through a processing program and another controller.

The controller recognizing means is for recognizing in advance which input processing program of the input selection program means is to be selected and executed so that each controller inputs the same external signal.

(Operation) According to the above configuration, the program in each controller is made the same, so that the program management is facilitated and the maintenance efficiency of the program is improved.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a triple control device provided with a controller recognition terminal according to one embodiment of the present invention.

In the figure, each controller 1A, 1B, 1C has a program AP for processing the A system, a program BP for processing the B system, and a program CP for the processing of the C system at the same time. Of the same. Next, a terminal T for inputting a signal for externally instructing each controller to recognize the system itself and to select and execute a processing program of the recognized system.
Is provided.

The input paths of the external signals of the controllers 1A, 1B, and 1C and the signal transmission paths between the controllers are the same as the connection configuration in FIG. 3, and are omitted in FIG. I have.

The A-system controller 1A in this configuration, to recognize that the A-system by applying the terminal T _1, for example, always a voltage for the controller recognition or the like to execute a processing program AP of the A-system. At this time, the controller recognition terminals T ₂ and T ₃
In this case, the processing selection of the B system and the C system is always made unsatisfied without performing wiring or the like. Similarly, the B-system controller 1B satisfied constantly B system process selection such as by applying a constant voltage to the terminal T ₂ of the controller recognizes, C type, is always satisfied the system A process selection, C system at C-system controller Processing selection is always established,
A system and B system processing selection is always unsatisfied.

As described above, by adopting the signal input terminal T for controller recognition and making the control programs of the controllers identical, the programs of the respective systems, for example, the processing program for the A-system controller 1A and the processing program for the B-system controller 1B This eliminates the need to individually manage the programs and the processing programs for the C controller 1C, thereby simplifying program management and improving the efficiency of operation and maintenance.

In the above-described embodiment, an example was described in which the number of signal input terminals for controller recognition was three. However, as another example, the number of signal input terminals for controller recognition was two, and a combination of input signals was used. There is also a method of determining the controller. That is, a program can be selected by a combination of the controller recognition input signal pattern such as A-system controller 1A of 00, B-system controller 1B of 10, and C-system controller 1C of 01.

[Effects of the Invention] As described above, according to the present invention, each multiplexed controller is provided with a signal input terminal for simultaneously loading the processing program of each system and recognizing which system is itself. Since the recognized system program is executed, the program of each controller can be operated as a unified and identical program, which facilitates operation management and improves maintenance efficiency.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a triple control device according to an embodiment of the present invention, FIG. 2 is a general configuration diagram of a triple control device, and FIG. 3 is a triple control that selects two signal inputs. Configuration diagram of device, fourth
FIG. 5 is an explanatory diagram showing the relationship between input points and input signals in each controller shown in FIG. 3, and FIG.
It is a lineblock diagram showing another example of a weight control device. 1 ... Selection circuit, 100 ... Control device, 1A ... A system controller, 1B ... B system controller, 1C ... C system controller, i ₁ ... External signal input point, i ₂ , i ₃ ... Signal Input points on the transmission line, l _ab , l _bc , l _ca …… signal transmission lines, O ₁ , O ₂ …… output points on the signal transmission lines, S ₁ , S ₂ …… external signals, T ₁ , T ₂ , T ₃ ……
Signal input terminal for controller recognition.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G06F 9 / 06,9 / 445,11 / 16-11 / 20,15 / 16 G05B 9/03

Claims (1)

(57) [Claims] A plurality of controllers for inputting an external signal from a control target and performing arithmetic processing by the same control program;
A multiplexing control device comprising: a selection circuit that processes outputs from the plurality of controllers and outputs a control signal to the control target; wherein each of the plurality of controllers is configured to directly input the external signal. An input selection circuit for selecting and outputting a signal from any one of an external signal input point and an external signal input point for inputting the external signal through another controller; and the same input processing in each of the multiplexed controllers Input via the input processing program and another controller for controlling the input selection circuit so as to select the input signal from the external signal input point when the external signal is directly input so as to have the input program Input selection program having an input processing program for controlling the input selection circuit to select an input signal from the external signal input point Program recognition means and controller recognition means for previously recognizing which input processing program of the input selection program means is to be selected and executed so that each controller inputs the same external signal. Characteristic multiplexing control device.