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MELSEC-Q
7 FUNCTION
7.4 Setting the Output (Y) Status when Changing from/to STOP Status to/from RUN Status
(1) Output (Y) Status when changing from STOP Status to RUN Status
When changing from RUN status to STOP status, the RUN status output (Y) is
stored in the sequence and all the outputs (Y) are turned OFF.
The status after transition from STOP to RUN can be selected from the following
two options with the High Performance model QCPU.
• The output status prior to STOP is output.
• The output is cleared.
(Default: After transition from STOP to RUN, the output (Y) status prior to
STOP is output then the program is executed.)
(a) Output (Y) status prior to STOP is output
After the output (Y) status before the STOP status is output, the sequence
program calculations are performed.
(b) Output is cleared
Clears all output (Y) and outputs the output (Y) after executing the
sequence program calculations.
STOP status to RUN status
Output the output (Y) status
right before changing to
STOP status.
Execute the sequence
program calculations
NO (Output (Y) status prior to STOP is output)
YES (Output is cleared)
Clear the output (Y) status.
Is output (Y)
status prior to
STOP output?
Fig. 7.3 Processing when Change from STOP Status to RUN Status
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