6
FUNCTIONS
6.4 Setting Output (Y) Status when Changing between STOP and RUN
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6.4 Setting Output (Y) Status when Changing between STOP and
RUN
(1) Definition of Setting Output (Y) Status when Changing between STOP
and RUN
When changed from the RUN or other status to the STOP status, the CPU module
stores the output (Y) in the RUN status into the PLC and turns all outputs (Y) OFF.
Status when changing from STOP to RUN can be selected from the following two
options with parameters in GX Developer.
• The output (Y) status prior to STOP is output.
• The output (Y) is cleared.
(2) Setting applications
Using a holding circuit or similar, it is possible to select whether the output is resumed
from the previous status or not when the STOP status is changed to the RUN status.
• When the output (Y) status prior to STOP is set to output
• When output (Y) is set to clear
Figure 6.6 Holding circuit
Figure 6.7 Timing chart when output (Y) status prior to STOP is set to output
Figure 6.8 Timing chart when output (Y) is set to clear
Start
button
Stop
button
OFF
ON
ON
ON
OFF
X21
Y0
X20
RUN
RUN
STOP
STOP
OFF
ON
ON
ON
OFF
X21
Y0
X20
RUN
RUN
STOP
STOP