Omron CJ2 CPU UNIT SOFTWARE User Manual page 357

PLC Power ON
In order for all data in I/O memory to be retained when the PLC is turned ON, the IOM Hold Bit
(A500.12) must be ON and it must be protected in the PLC Setup.
Retained
Power ON
Auxiliary Area Flags and Words
Name
IOM Hold Bit
PLC Setup
When using the CX-Programmer, select the IOM Hold Bit Check Box in the Startup Hold Area on the
Startup Tab Page to make the setting.
CJ2 CPU Unit Software User's Manual
I/O memory
CIO Area and
other areas
Address
A500.12 When this bit is ON, all of I/O memory will be retained when the operat-
ing mode is changed between PROGRAM and RUN/MONITOR or the
power is turned ON.
ON: I/O memory will be retained when the operating mode is changed.
OFF: I/O memory will be cleared when the operating mode is changed.
10 CPU Unit Functions
Description
10
10-23