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3
SEQUENCE PROGRAM EXECUTION
3.4 RUN, STOP Operation Processing
3 - 10
1
Overview
2
Performance
Specification
3
Sequence Program
Configuration and
Execution Conditions
4
I/O Nunber Assignment
5
Memories and Files
Handled by CPU Module
6
Functions
7
Communication with
Intelligent Function
Module
8
Parameters
(3) CPU module operation processing at switch operation
Note3
POINT
The CPU module performs the following in any of RUN and STOP status:
I/O refresh processing
Automatic refresh processing of CC-Link Safety
MELSECNET/H module refresh processing
Self-diagnostic processing
Communication processing with GX Developer
If placed in the STOP status, therefore, the CPU module can perform I/O monitor
and test operation using GX Developer.
Table3.1 Operation processing at switch operation
RUN/STOP
status
CPU module operation processing
Sequence
program
operation
processing
External output
Device memory
M,T,C,D Y
RUN STOP
Executes up to
the END
instruction and
stops.
Saves the output (Y)
status immediately
before switching to the
STOP status, and turns
all points OFF.
Saves the device memory
status immediately before
switching to the STOP
status.
Saves the output (Y)
status immediately
before switching to
the STOP status, and
turns all points OFF.
STOP RUN Starts at step 0.
Determined by the
"STOP RUN-time
output mode" in the
PLC parameter dialog
box.
Uses the device memory
status when the CPU module
had been set to STOP status.
Determined by the
"STOP RUN-time
output mode" in the
PLC parameter
dialog box.
( Section 6.10)
Note3
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