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24 Change Detect DC Input Module (CD332)
5. Programming
5.2 Interrupt operation
The enable/disable of the interrupt program is changed as follows.
n+1n21
Interrupt
PLC mode
HALTRUNHOLDRUN
Disable
(Hold)
Time
DisableEnableEnableDisable
HALT
Scan
In the RUN mode, interrupt operation is disabled at the first scan, and enabled from the
second scan.
In the HALT mode, interrupt operation is disabled.
In the HOLD mode, interrupt operation is disabled but the interrupt requests occurred
during HOLD mode is held.
During interrupt program execution, other interrupts are disabled, and the interrupt
request is held as follows.
Execution
n+2n+1nn21
Interrupt
PLC mode
HALTRUN
Disable
(Hold)
Time
DisableEnableEnableDisable
HALT
Interrupt program
Scan
Note) The held interrupt requests are accepted when interrupt status is changed to
enable, according to the priority as follows.
(Timer interrupt → I/O#1 → I/O#2 → … → I/O#8, in default)