Omron CP1 series PLC interrupt classification

1. Direct I/O interrupt is a change in the interrupt input from the built-in input unit on the CPU rack (0→1; 1→0).

2, count interrupt, PLC CPU unit built-in input pulse count, count reach set value and execute interrupt.

3, timing interrupt, PLC CPU unit of the built-in timer to a certain time interval and the execution of the interrupt.

4, high speed counting interrupt, the CPU unit of PLC built-in high speed counter to the input pulse count, count to reach the set value, or through the area ratio and the execution of the interrupt.

5, external interrupt, CP1 series PLC and CJ or other series of high function I/O unit or CPU high function unit connection, if received the interrupt generated by these units, CP1 series PLC CPU unit will immediately respond to the interrupt, the execution of interrupt subroutine.

The priority of the five interrupts in descending order is: external interrupt > Direct I/O interrupt > Count interrupt > high-speed count interrupt > Timed interrupt.

In the same interrupt level, the task with a smaller number takes precedence over the task with a larger number.