Omron CJ1W-NC271 - 12-2009, Operation Manual

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CPU Unit Error Display
Section 12-7
12-6-3 Restarting the PCU
For errors that cannot be cleared using ERROR RESET, remove the cause of
the error and either cycle the power to the CPU Unit or restart the CPU Bus
Unit to enable the PCU to recover from the error.
12-7 CPU Unit Error Display
The CPU Unit monitors the PCU, which is a CPU Bus Unit, as follows:
• Monitors PCU for hardware errors
• Monitors unit number duplication
• Monitors refreshing between the CPU Unit and PCU.
If an error is detected during the above monitoring operations, the corre-
sponding flag in the Auxiliary Area of the CPU Unit will turn ON (for details on
each flag, refer to the CPU Unit's operation manual). The flags are as follows:
• CPU Bus Unit Number Duplication Flags (A41000 to A41015)
• CPU Bus Unit Error, Unit Number Flags (A41700 to A41715)
• CPU Bus Unit Setting Error, Unit Number Flags (A42700 to A42715)
• CPU Bus Unit Setting Error Flag (A40203)
• CPU Bus Unit Error Flag (A40207)
Perform error processing according to the tables provided in 12-3 LED Error
Indicators and 12-4-2 List of Error Codes .
Name Word Details Read/write
CPU Bus Unit
Restart Flag A50100 to
A50115 The CPU Bus Unit is restarted when
this flag is set from 0 to 1. Each bit cor-
responds to the unit number. Bits 00 to
15: Unit numbers 0 to F Read/write
possible