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CHAPTER 3 CPU MODULE FUNCTIONS
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3.7 Output Mode at Operating Status Change (STOP to RUN)
3.7 Output Mode at Operating Status Change (STOP to RUN)
When the operating status is changed from RUN to STOP, the CPU module internally stores the outputs (Y) in the
RUN status and then turns off all the outputs (Y). Therefore, status of the outputs(Y) can be selected for setting when
the CPU module is set back to the RUN status.
• Output the output (Y) status prior to STOP. ("Previous state")
• Clear the output (Y) status. ("Recalculate (output is 1 scan later)")
(1) Operation when the operating status is changed from STOP to RUN
Operations are explained using the holding circuit below.
(a) When outputting the output (Y) status prior to STOP
The CPU module outputs the output (Y) status immediately before the CPU module is changed to the STOP
status, and then performs program operations.
When the output (Y) status is forcibly turned on while the CPU module is in the STOP status, the CPU module
outputs the previous output (Y) status. The on status is not held if the output (Y) status before the CPU module
is changed to STOP status is off.
(b) When clearing output (Y) status
All outputs are turned off. The CPU module outputs the output (Y) status after program operations are
completed.
When the output (Y) status is forcibly turned on while the CPU module is in the STOP status, the CPU module
holds the on status.
(2) Setting procedure
Configure the setting under "Output Mode at STOP to RUN"
Project Window [Parameter] [PLC Parameter] [PLC System]
OFF
OFF
ON
ON
OFF
X21
Y0
X20
RUN STOP
STOP RUN
OFF
OFF
ON
ON
OFF
X21
Y0
X20
RUN STOP
STOP RUN
Select either of
these.
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