System error in subsystem MCA or BMC (code line %d).
Bosch Rexroth · Motion Control
What does 847 mean?
A system error was detected in either the MCA or BMC subsystem at a specific code line. This is a minor system error; however, a precise cause can only be determined after examination by the development department. No error recovery is possible by the technician.
Common Causes
- System error within the MCA or BMC subsystem.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Verify supply voltage at the main power input terminals of the Bosch Rexroth motion control unit against nominal specifications.
- 2
Inspect all external cabling (power, motor, encoder, communication) for physical damage, proper routing, and secure connections, including ground continuity.
- 3
Check the operating environment, including ambient temperature and ventilation, to ensure it is within the manufacturer's specified limits for the motion control unit.
- 4
Access and document the diagnostic buffer or event log of the motion control unit for any additional error codes or warnings preceding or concurrent with error 847.