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(b) By GX Developer or an external device using the MC protocol
Select [Online] [Remote operation] in GX Developer.
To perform the remote PAUSE operation from an external device, use the MC protocol command.
Q Corresponding MELSEC Communication Protocol Reference Manual
• The PAUSE contact (SM204) turns on during END processing of the scan where the remote
PAUSE command is executed.
The CPU module executes one more scan until the END instruction after the scan where the PAUSE
contact turns on, and then changes its operating status to PAUSE. In the PAUSE status, the program
operations are stopped.
•
Upon execution of the remote RUN command, the CPU module will restart the sequence
program operations from the step 0.
(4) Precautions
(a) When forcibly keeping output status
To forcibly keep the output status (on or off) in the PAUSE status, provide an interlock with the
PAUSE contact (SM204).
Figure 6.18 Remote PAUSE by GX Developer or an external device
Figure 6.19 Program example for forcibly keeping output status in the PAUSE status
Remote PAUSE
command
Remote RUN
command
SM204
OFF
OFF
OFF
ON
0
0
END
END
0
0
END
ON
ON
Turns on when the
PAUSE conditions
are established
PAUSE status
RUN/PAUSE
status
RUN RUN
PAUSE
M20
X0
M0
SM204
SM204
Y70
Y71
Y72
The on/off status of Y70 is determined by the
on/off status of M20 in the PAUSE status.
Y71 turns off in the PAUSE status.
Y72 turns on in the PAUSE status.