CPU Unit Operation Section 9-1
189
9-1-2 Startup (Initial) Process
The following Startup (Initial) process is performed once when start-up,
changing the configuration of the Ladder Engine, reset, or changing the op-
erating mode (between Run/Monitor and Program).
• Clear the non-hold-type area in the I/O memory areas
Processed as follows depending on IOM Hold Bit and PLC Setup (setting
for Hold/Non-hold of IOM Hold Bit when startup).
IOM Hold Bit (A50012)
Auxiliary Area
PLC Setup
Non-hold (0) Hold(1)
Non-hold (0)
Startup: Cleared
Changing the mode: Hold
Setting for Hold/Non-hold of IOM
Hold Bit when startup
Hold (1)
Startup: Cleared
Changing the mode:
Cleared
Startup: Hold
Changing the mode: Hold
• Clear Force-set/reset
Processed as follows depending on Force-set/reset Hold Bit and PLC
Setup (setting for Hold/Non-hold of Force-set/reset Hold Bit).
Force-set/reset Hold Bit (A50013)
Auxiliary Area
PLC Setup
Non-hold (0) Hold(1)
Non-hold (0)
Startup: Cleared
Changing the mode: Hold
Setting for Hold/Non-hold of
Force-set/reset Hold Bit
Hold (1)
Startup: Cleared
Changing the mode:
Cleared
Startup: Hold
Changing the mode: Hold
• Automatically executed if the program for automatic execution (Autoexec
file) exists in the file memory.
• Self-diagnosis (UM area check)
Note
Refer to 9-2 I/O Memory Areas of CS/CJ Series Operation Manual for the
startup process for I/O memory areas.
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