APS: NCB error %d with request of communication memory.
Bosch Rexroth · Motion Control
What does 897 mean?
A request for memory space via the dual port (identified by NCB error %d) could not be satisfied. This is a PLC error, indicating a critical memory allocation failure for communication, with no error recovery possible.
Common Causes
- Request for communication memory via the dual port could not be satisfied.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Verify input power supply voltage and stability to the Bosch Rexroth Motion Control unit against specified ranges.
- 2
Inspect all communication modules and their associated bus cabling for proper seating, loose connections, or visible damage.
- 3
Check the PLC's diagnostic buffer and system logs for any preceding or co-occurring error messages providing context to the communication memory failure.
- 4
Verify the current firmware version of the Bosch Rexroth Motion Control system against manufacturer's latest recommendations and known issues.
- 5
Review the PLC application program for potential memory overruns or misconfigurations that might lead to communication memory allocation failures.