AH500 Hardware and Operation Manual
(3) After the users click Interrupt number, they can type interrupt numbers in the Initial cells.
If an input signal received by input channel 0 exceeds the range, the external interrupt I40 will be triggered.
However, if no POU is assigned to the external interrupt I40, or the POU assigned to the external interrupt I40
is not downloaded to the special high-speed module, an error will occur in AH06XA-5A.
Interrupts can not be executed simultaneously. If other interrupts are triggered when one interrupt is
executed, the interrupts triggered will be recorded. After the execution of the interrupt is finished, the
interrupt which has priority over the other interrupts will be executed next.
If an interrupt is triggered repeatedly when it is executed, only one interrupt will be recorded, and the
other interrupts will be ignored.
Users can not set two different interrupt conditions for one interrupt number. For example, if I220 is used by a
network module, it can not be used by an analog input/output module.
8.2.7 Timer Interrupts
There are four timer interrupts (I252~I255).
Timer interrupt 0 (I252): The default value is 100 milliseconds (1~1000 milliseconds).
Timer interrupt 1 (I253): The default value is 40 milliseconds (1~1000 milliseconds).
Timer interrupt 2 (I254): The default value is 20 milliseconds (1~1000 milliseconds).
Timer interrupt 3 (I255): The default value is 10 milliseconds (1~1000 milliseconds).
A timer interrupt is executed every specific period of time. For example, the timed interrupt task is executed
every 10 milliseconds. Users can set the timer interrupts in the PLC Parameter Setting window.
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