Okuma Alarm P-0855 – MCS Converter Link Error

Okuma Alarm P-0855 (MCS Converter Link Error) occurs when communication between the power unit and inverter unit fails via the converter link, preventing the NC from correctly monitoring the power unit status. This alarm is commonly caused by faulty link cables/connectors, communication board issues, power supply instability, or internal faults in the power or inverter unit.