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Interrupt Tasks Section 4-3
3. CJ1 CPU Units do not support I/O interrupt and external interrupt tasks.
I/O Interrupt Tasks: Tasks 100 to 131
I/O interrupt tasks are disabled by default when cyclic task execution is
started. To enable I/O interrupts, execute the MSKS (SET INTERRUPT
MASK) instruction in a cyclic task for the interrupt number for Interrupt Input
Unit.
Example: The following example shows execution I/O interrupt task 103 when
interrupt input No. 3 of Interrupt Input Unit No. 0 (the leftmost of the two Units
0 and 1) is ON.
Note Do not enable unneeded I/O interrupt tasks. If the interrupt input is triggered
by noise and there isn’t a corresponding interrupt task, a fatal error (task
error) will cause the program to stop.
Cyclic task
I/O interrupt from Interrupt Input
Unit No. 0
Interrupt input number: Only 3 will
be enabled.
The specified I/O in-
terrupt will be en-
abled when the
MSKS instruction is
executed.
Interrupt Input Unit No. 0
Interrupt
Cyclic task
I/O interrupt task 103
#FFF7
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