JPH0455906A - Method and device for high speed interruption type control of sequencer - Google Patents

Abstract

PURPOSE:To attain the effective execution of a ladder by dividing the ladder sequence control into two parts, i.e., the normal repetitive control and the high speed interruption control. CONSTITUTION:Some signals requiring the high speed response are fetched by an interruption condition deciding part 200 out of those signals inputted through a control signal input part 100. The part 200 decides whether the high speed interruption processing should be carried out or not based on the interruption grant signal received from an input/output signal control part 403. If the high speed interruption is granted, a processing start address is produced at an interruption address generating part 300 in response to an interruption signal. Then the corresponding interruption processing is started at a high speed interruption control part 401 included in a ladder sequence control part 400. Meanwhile the normal processing is carried out among the parts 100 and 403 and a repetitive control part 402 in a normal state where no high speed interruption processing is carried out at and after a power supply is turned on.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high-speed interrupt-type control method and apparatus for a sequencer, and particularly to a high-speed interrupt-type control method and apparatus for a ladder-type sequencer.

[Conventional technology]

Conventionally, this type of sensor has been controlled by a repeating method, in which ladders programmed in a ladder diagram are executed one after another from the beginning, and when the last ladder is executed, the program returns to the first ladder.

[Problem to be solved by the invention]

In the conventional technology described above, the ladder is always executed one by one from the beginning to the end, so when the step size of the ladder becomes large, the execution time for one cycle becomes longer and the response time required of the device to be controlled cannot be satisfied ( In addition, it has the disadvantage that it cannot process a controlled object that requires particularly high-speed response.

[Means to solve the problem]

The high-speed interrupt control device for a sequencer of the present invention divides the work to be controlled into two parts: one is a repetition control part that executes repetitive processing, and the other part is used to enable high-speed response. The high-speed interrupt control section checks the signal to be controlled and determines whether or not to perform a high-speed response, generates an interrupt processing address, and executes the processing.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

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

Among the signals inputted from the control signal input/output section 100, some of the signals that require high-speed response are sent to the interrupt condition determination section 20.
0, and it is determined whether or not to perform high-speed interrupt processing based on the interrupt permission signal from the input/output signal control unit 403.

If the interrupt is permitted, a processing start address corresponding to the interrupt signal is generated in the interrupt address generation section 300, and the corresponding interrupt processing in the high speed interrupt control section 401 in the ladder sequence control section 400 is started.

On the other hand, in a normal case where no high-speed interrupt processing has occurred since the power was turned on, the control signal input/output unit 100, the input/output control unit 403. Normal processing is executed between the repetition control unit 402.

FIG. 2 shows that the normal processing of the repetition control section and the interrupt processing (1, 2, . . . n) of the high-speed interrupt control section are executed in parallel.

〔Effect of the invention〕

As explained above, the present invention divides ladder sequence control into two parts; one part performs normal repeat control and the other part performs high-speed interrupt control, thereby processing processes that require high-speed response. In addition to separating processing from processing that can be performed at low speed,
Even in high-speed response processing, depending on how the interrupt order is initially set, it is possible to take into account the frequency of interrupts, the priority of processing, etc., and it is effective in enabling efficient execution of the ladder.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a schematic diagram explaining the operation of FIG. 1. 100... Control signal input/output section, 200... Interrupt condition determination section, 300... Interrupt address generation section, 400...
- Ladder sequence control unit, 401... High speed interrupt control unit, 402... Repetition control unit, 403... Input/output signal control unit.

Claims (1)

[Claims] 1. In a high-speed interrupt type control method for a ladder sequencer that is programmed using a ladder diagram, the work to be controlled is divided into two, one for performing normal repetitive processing, and the other for performing normal repetitive processing. A high-speed interrupt type control method for a sequencer, characterized in that a high-speed interrupt condition determination section and a high-speed interrupt processing activated by the interrupt processing address generation section are executed in parallel. 2. Includes a repetition control unit that executes repetitive processing, and a high-speed interrupt control unit that checks the input signal to be controlled, determines whether or not to perform a high-speed response, generates an interrupt processing address, and executes the processing. A high-speed interrupt type control device for a sequencer, which is characterized by: