Mitsubishi MELSEC QS Series, Руководство пользователя

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- 9 3.4 RUN, STOP Operation Processing
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SEQUENCE PROGRAM EXECUTION
3.4 RUN, STOP Operation Processing
CPU module has two types of operation status; RUN and STOP 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 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 6.10)
(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 0.1 s)
(2) STOP Status Operation Processing
The STOP status means that the sequence program operation is stopped by the
RUN/STOP/RESET switch or the remote STOP function. (
Section 6.12.1)
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.