Allen Bradley SLC 500 Errors
Whenever major error is encountered bit S:1/13 – Major Error Halted Bit is set.
S:54 – Last Major Error Fault Code mirrors the last error code value stored in S:6 register.
E.g. error code 0001h is displayed as 1h.
Major faults can be classified as:
Non-recoverable – a fault caused by the user that cannot be recovered from. The user-fault routine is run when this fault occurs. However, the fault cannot be cleared.
Recoverable – a fault caused by the user that can be recovered from in the user-fault routine by resetting Major Error Halted Bit(S:1/13). The user-fault routine is run when this fault occurs.
Major Error categories are:
- powerup errors
- going-to-run errors
- runtime errors
- user program instruction errors
- I/O errors
- 00 mean slot 0
- 1E mean slot 30
- 1F mean slot cannot be determined.
- 03 is special – for modular SLC controller it mean slot 3 but for compact SLC controller it mean slot cannot be determined.
E.g. Error code 250h (0250h) – A chassis data error is detected for module in slot 2