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3.5 RUN, STOP, PAUSE Operation Processing
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SEQUENCE PROGRAM CONFIGURATION AND
EXECUTION CONDITIONS
3.5 RUN, STOP, PAUSE Operation Processing
CPU module has three types of operation status; RUN, STOP and PAUSE status.
CPU module operation processing is explained below:
(1) RUN Status Operation Processing
RUN status is a status where the sequence program operations are repeatedly
performed from step 0 to the END (FEND) instruction, and back to step 0.
(a) Output status when changing into RUN status
The processing time between the status change from STOP to RUN and the
sequence program operation start varies depending on the system configuration
and parameter settings. (Normally 1 to 3 seconds) Note that the processing time
may increase depending on the conditions.(
(b) Processing time before operation start
The processing time taken from switching STOP to RUN until the operation start
of the sequence program varies with the system configuration and parameter
settings. (Normally 1 to 3 seconds)
Note that it may increase depending on the conditions.
(2) STOP Status Operation Processing
STOP status is a status where the sequence program operations are stopped by the
RUN/STOP switch (the RUN/STOP/RESET switch in the case of the Basic model
QCPU and Universal model QCPU) or the remote STOP function (
The CPU module is also placed in the STOP status when a stop error occurs.
(a) Output status when changing into STOP status
When changing into the STOP status, the CPU module saves the output (Y)
status and turns all output points OFF.
The device memory of other than the output (Y) is retained.
(3) PAUSE Status Operation Processing
PAUSE status is a status where the sequence program operations are stopped by the
remote PAUSE function (
Section 6.6.2) while retaining the output and device
memory status after executing the program for one scan.
