Mitsubishi Electric MELCEC Q Series - Page 54

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CPU MODULE4.
(5) Operation processing of programmable controller CPU when RUN/STOP key switch
is operated
RUN/STOP key
switch operation
Programmable controller CPU operation processing
Remark
Operation
processing of a
sequence program
External output
Data memory
M, L, S, T, C, D Y
RUN STOP
Executes up to the
END instruction,
then stops.
OS saves the output
status, and sets all the
output points to OFF.
Retains the condition
immediately prior to
entering the STOP
status.
OS saves the output
status, and sets all
the output points to
off.
STOP RUN Starts.
Determined by the
output mode of the
parameter upon
STOP RUN.
Starts operations
from the condition
immediately prior to
entering the STOP
status.
Determined by the
output mode of the
parameter upon
STOP RUN.
POINT
1. Whether in the RUN state, STOP state or PAUSE state, programmable
controller CPU is performing the following:
Refresh processing of I/O module
Data communication with computer link module
Link refresh processing.
Thus, even in the STOP or PAUSE status, monitoring or testing I/O with
peripheral devices, reading or writing from a computer link module, and
communication with other stations by MELSECNET/10, MELSECNET/MINI-
S3 are possible.
2. STEP-RUN executes the END processing when executes the END (FEND)
instruction during step operation.
For current value update of the timer, the programmable controller adds 1 by
1 scan on the 10ms timer and adds 1 by 10 scan on the 100ms timer.