Okuma Alarm P-0836 – Program Request Illegal

Alarm P-0836 indicates that the CNC control sent an invalid or undefined processing request to the loader control system.
The requested program number or command is not permitted in the current machine state.

This alarm typically occurs when:

• The loader receives an unsupported program call

• The CNC and loader software versions are incompatible

• A program step was executed in the wrong operating mode

• The loader sequence was interrupted

• PLC parameters are inconsistent

The control blocks execution to prevent incorrect loader movement or program conflict.

Recommended actions:

1. Check the current operating mode (AUTO / MANUAL).

2. Verify the active program number.

3. Reset the loader system.

4. Confirm CNC and loader software compatibility.

5. Review PLC communication parameters.

If the alarm persists, inspect the PLC program and loader interface signals.