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6.6.2 Remote PAUSE
(1) Definition
This operation changes the operating status of the CPU module externally to PAUSE, keeping the
RUN/STOP/RESET switch of the CPU module in the RUN position.
PAUSE status is a status where sequence program operations in the CPU module are stopped,
holding the status (on or off) of all outputs (Y).
(2) Application
This operation is useful, especially during the process control, to hold the on status of outputs (Y) even
after the operating status of the CPU module is switched from RUN to STOP.
(3) Executing method
There are two methods for performing the remote PAUSE operation.
• Using a PAUSE contact
• By GX Developer or an external device using the MC protocol
(a) Using a PAUSE contact
Set a PAUSE contact in the PLC system tab of the PLC parameter dialog box.
The settable device range is X0 to 1FFF
The PAUSE contact (SM204) turns on during END processing of the scan where both the
•
PAUSE contact and PAUSE enable coil (SM206) turn on.
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.
When the PAUSE contact or SM206 is turned off, the PAUSE status will be canceled and the
•
CPU module will restart the sequence program operation from the step 0.
PAUSE
contact
SM206
SM204
RUN/PAUSE
status
Setting of only a PAUSE contact is not allowed.
When setting a PAUSE contact, set a RUN contact as well.
6 - 20
.
0
END
0
ON
OFF
ON
OFF
ON
OFF
Turns on when the
PAUSE conditions
are established
RUN
Figure 6.17 Remote PAUSE using a PAUSE contact
END
0
END
PAUSE
PAUSE status
END
0
RUN
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