Interrupt Operation - Toshiba CD332 User Manual

5. Programming

5.2 Interrupt operation

The enable/disable of the interrupt program is changed as follows.
PLC mode
Scan
Interrupt
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.
PLC mode
Scan
Interrupt
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)
24
Change Detect DC Input Module (CD332)
HALT RUN
1 2
Disable Enable
HALT
Interrupt program
1 2
Disable Enable
HOLD
n
Disable
(Hold)
RUN
Execution
n n n+1
Disable
(Hold)
RUN HALT
n+1
Enable Disable
Time
HALT
n+2
Enable Disable
Time