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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 indicate that the sequence program operation is performed from step 0 to
END (FEND) instruction to step 0 repeatedly.
(a) Output status when changing into RUN status
When changing into the RUN status, the CPU module either outputs the output
(Y) status saved in the STOP status or outputs the operation result after one scan
depending on the STOP RUN-time output mode setting of the parameter dialog
box.( Section 6.4)
(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
The STOP status means that the sequence program operation is stopped by the
RUN/STOP switch (The RUN/STOP/RESET switch in the case of the Basic model
QCPU) or the remote STOP function. ( Section 6.6.1)
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
The PAUSE status indicates that the sequence program operations are paused by
remote PAUSE function( Section 6.6.2)while maintaining the output and device
memory status.
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