Omron CJ - 09-2009 Operation Manual page 268

Examples
9. Transferring the Program
10. Testing Operation
10-a) I/O Wiring Checks
10-b) Auxiliary Area Settings
220
Note When writing the program with a Programming Console, specify whether
there are interrupt tasks during the memory clear operation.
When the program has been created in the CX-Programmer, it must be trans-
ferred to the PLC's CPU Unit.
Before performing a Trial Operation in MONITOR mode, check the I/O wiring.
Check Output Wiring
With the PLC in PROGRAM mode, force-set and force-reset output bits and
verify that the corresponding outputs operate properly.
Check Input Wiring
Activate input devices such as sensors and switches and verify that the corre-
sponding indicators on the Input Units light. Also, use the Bit/Word Monitor
operation in the Programming Device to verify the operation of the corre-
sponding input bits.
Make any required Auxiliary Area settings, such as the ones shown below.
These settings can be made from a Programming Device (including a Pro-
gramming Console or the CX-Programmer) or instructions in the program.
IOM Hold Bit (A50012)
Turning ON the IOM Hold Bit protects the contents of I/O memory (the CIO
Area, Work Area, Timer Completion Flags and PVs, Index Registers, and
Data Registers) that would otherwise be cleared when the operating mode is
switched from PROGRAM mode to RUN/MONITOR mode or vice-versa.
Input Unit
Retained
I/O
memory
Operating mode changed
Section 4-2
Force-reset