Initial Processing; Refresh Processing Of I/O Module - Mitsubishi Q2ACPU User Manual

12. OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU

12.1.5 Initial processing

Initial processing is the pre-processing for executing sequence operations.
The QnACPU executes it only once in the case of the CPU module status described in the
following table.
Once the initial processing is completed, the CPU module is placed into the operation
status set by the RUN/STOP switch.
Initialization of I/O module
Initialization of devices outside latched range
(Bit device: OFF, Word device: 0)
Self-diagnostics
Auto allocation of module I/O No.
Setting MELSECNET/10 network info and MELSECNET(II)/B
data link info
Setting CC-Link info and MELSECNET/MINI-S3 info
Setting initial device values
Booting from memory card

12.1.6 Refresh processing of I/O module

Refresh processing of I/O modules is executed.
(Refer to the QnACPU Programming Manual (Fundamentals).)
Item
*1 Indicates the case that the CPU enters RUN status without being reset after changing a
parameter or program in STOP status.
(The RUN/STOP key switch is operated as follows: STOP
flickering.) STOP
Note that the instructions for conversion into pulse (PLS,
the previous information may not be retained depending on the program change (write during
RUN in STOP status, or write to PLC).
Status of the CPU module
At Power ON
RUN.)
12 - 22
STOP
At RESET
Status*1
: Executed : Not executed
RUN (RUN LED is
P) may not function properly since
RUN