Operation Processing; Initial Processing - Mitsubishi Electric MELSEC-Q Series User Manual

4 SEQUENCE PROGRAM CONFIGURATION & EXECUTION
CONDITIONS

4.3 Operation Processing

4.3.1 Initial processing

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This is a preprocessing for sequence operation execution, and is performed only once
as shown in the table below.
When the initial processing is completed, the Basic model QCPU goes in the
RUN/STOP/RESET switch setting status. (See Section 4.4.)
Initial processing item
The Input/Output module initialization
Boot from the standard ROM
Device initialization of the range not latched
(bit device: OFF, word device: 0)
Execution of self-diagnosis in the QCPU CPU
modules
Automatic allocation of the I/O number of
installed modules
Start of the MELSECNET/H network information
setting and network communication
Switch setting of intelligent function module
Setting of CC-Link information
Setting of Ethernet information
Setting of serial communication function
: executed, : not executed
REMARK
1: When parameters or programs are changed in the STOP status, reset by the
RUN/STOP/RESET switch.
When the RUN/STOP/RESET switch is turned from STOP to RUN without the
reset, RUN LED flashes.
When the RUN/STOP/RESET switch is turned from RUN to STOP to RUN
again, the Basic model QCPU goes in the RUN status, and the "When STOP to
RUN" status becomes effective.
However, fully note that the pulsing instruction (PLS,
properly since the previous information is not continued depending on program
modifications.
Basic model QCPU status
When the power When reset is
is turned on. executed.
P) may not operate
MELSEC-Q
When STOP
1
to RUN
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