Fanuc DC Axis Unit Alarms and Error Codes listed on this page only cover the M Series DC Axis units series 6047 (Yellow cap motors).
If your interested in finding stock of Fanuc DC Axis drive units (Velocity Control Unit).
|Indication||Type||Description of Alarms|
|NC||Overload||Overload alarm occurs if the motor current exceeds the current required to actuate the thermal relay. Or if the power transformer thermostat or the regenerative discharge unit thermostat operates|
|TGLS||Tacho Generator||Motor speed exceeds the specified upper limit due to a break in in the velocity feedback wire, the TGLS indicator goes on. The motor is stopped by the dymanic brake.|
|OVC||Over Current||Motor current exceeds the specified upper limit for more than the fixed period ( about 600 msec), the OVC indicator goes on. The motor is stopped by the dynamic brake.|
|BRK||Circuit Breaker||Abnormal current exceeding the rating limit of the breaker is applied to the motor, the circuit breaker operates. The motor is stopped by the dynamic brake.|
|HVAL||Over Voltage||AC input voltage applied to the servo transformer exceeds the allowable value, the HVAL indictator goes on. The motor is stopped by the dynamic brake.|
|HCAL||Low Voltage||AC power source voltage drops abnormally, the LVAL indicator goes on. The motor is stopped by the dynamic brake.|
|DCAL||DC Issue||Abnormal current is applied to the transistor bridge circuit, the HCAL indicator goes on. The motor is stopped by the dynamic brake.|
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