CPU Bus Unit Number Duplication
Omron · SYSMAC CJ2 CPU Unit
What does A410.00 to A410.15 mean?
This flag turns ON when a CPU Bus Unit's unit number has been duplicated. Bits 00 to 15 correspond to unit numbers 0 to F. The Duplication Error Flag (A401.13) will also turn ON. The CPU Unit operation will stop, and the ERR/ALM indicator on the front of the CPU Unit will light.
Common Causes
- Two or more CPU Bus Units are configured with the same unit number (0 to F)
- Incorrect physical DIP switch settings on the CPU Bus Units lead to duplicated addresses
Repair Steps & Checklist
Click steps to track your progress.
- 1
Identify the problematic CPU Bus Unit(s) by checking the ON status of A410.00 to A410.15 (Bits 00-15 for Unit numbers 0-F)
- 2
Physically inspect the DIP switch settings on all CPU Bus Units to verify unique unit numbers
- 3
Access the PLC Setup or I/O Table in CX-Programmer to review the configured unit numbers for all CPU Bus Units
- 4
Reconfigure either the physical DIP switches or the software settings to ensure each CPU Bus Unit has a unique unit number