Mitsubishi Q2ACPU User Manual

12.
12 - 22
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.
: Executed : Not executed
*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 RUN (RUN LED is
flickering.) STOP RUN.)
Note that the instructions for conversion into pulse (PLS, P) may not function properly since
the previous information may not be retained depending on the program change (write during
RUN in STOP status, or write to PLC).
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
Status of the CPU module
At Power ON At RESET
STOP RUN
Status*1
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

Mitsubishi Q2ACPU Specifications

General

Brand	Mitsubishi
Model	Q2ACPU
Category	Controller
Language	English