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4.A2CCPU
- - - - - - - - - - - - - - - - - - - MELSEC-A
4:2.4
Stollplng the sequence program operation retaining outputs (PAUSE function)
The pause function stops A2CCPU operation while retaining the status of all
I
outputs
(Y).
(1)
Application
In process control, it is often required to retain the status of the outputs
(Y)
when the A2CCPU stops operating.
(2)
Using remote PAUSE contacts
(a) The PAUSE state contacts (M9041) close after the execution of the
END(FEND) instruction of the scan during which the remote PAUSE
contacts close and the PAUSE permission flag (M9040) is set.
When the END(FEND) instruction of the scan after M9041 has set
is executed, the A2C is set to PAUSE and its operation stops.
(b) By opening the remote PAUSE contacts or by switching off M9040
on a peripheral device, the PAUSE state is canceled, and sequence
program operation resumes from step O.
Remole PAUSE
contact
M9040
M9041
RUN/STOP state
0 - - - END
o
- - - - E N D
ON
OFF
I
ON
OFF
I
ON
OFF
~edOnWhen
conditions to set the
PAUSE
CPU module In the
RUN
pause state are
satisfied
- O-END
0 -
--
--
--
PAUSE state
Fig. 4.15 PAUSE Timing by the Remote PAUSE Contact
4-26

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