2 CPU MODULE OPERATION PROCESSING
2.2 Operation Processing When Operating Status Is Changed
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2
Output mode at operating status change (STOP to RUN)
When the operating status changes from RUN to STOP, for example, the CPU module internally stores the status of the
outputs (Y) to turn them all off.
Operation when the operating status is changed from STOP to RUN
Select whether or not to resume from the previous output status when the operation status of the CPU module is changed
from STOP to RUN by using a holding circuit.
■Outputting the output (Y) status before STOP
The program operation is resumed after outputting the output (Y) status immediately before the operating status of the CPU
module is changed to the STOP state. If the output (Y) is forcibly turned on in the STOP state, the status prior to the STOP
state is output. If the output (Y) was off before entering the STOP state, the status when it was on is not retained. In the
following figure, X20 represents the start button, X21 represents the stop button, and Y represents an output.
■Clearing the output (Y) (output after one scan)
All outputs are turned off, and the output (Y) is output after the program operations are executed. If the output (Y) is forcibly
turned on when the operating state is STOP, the ON state is retained. In the following figure, X20 represents the start button,
X21 represents the stop button, and Y represents an output.
• When using a SIL2 Process CPU, refer to the following as well.
Page 605 FUNCTIONS
• When using a Safety CPU, refer to the following as well.
Page 535 FUNCTIONS
RnCPU
RnENCPU
RnSFCPU RnSFCPU
RnPSFCPU RnPSFCPU
RnPCPURnPCPU
(Standard) (Safety)(Standard) (Safety)
(Redundant)
(Process)
ON
OFF
OFF
ON
OFF
X21
Y0
X20
RUN→STOP STOP→RUN
X21
Y0
X20
RUN→STOP STOP→RUN
ON
OFF
ON
OFF
OFF
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