Series 16/18/160/180-Model C Maintenance Manual, GFZ-62755EN ...

B. ALARM LIST APPENDIXB–62755EN/01AlarmNo.MeaningDescriptionRemedyAL–49 The converted differentialspeed is too high.Detects that speed of other spindle converted tospeed of local spindle has exceeded allowable limitin differential mode.Calculate differentialspeed by multiplying speedof other spindle by gear ratio.Check if calculated valueis not greater than maximumspeed of motor.AL–50AL–51Excessive speed commandcalculation value in spindlesynchronization controlUndervoltage at DC link sectionDetects that speed command calculation value exceededallowable range in spindle synchronizationcontrol.Detects that DC power supply voltage of power circuithas dropped (due to momentary power failure orloose contact of magnetic contactor).Calculate motor speed bymultiplying specifiedspindle speed by gear ratio.Check if calculated valueis not greater than maximumspeed of motor.Remove cause, then resetalarm.AL–52 ITP signal abnormality I Detects abnormality in synchronization signal (ITPsignal ) used in software.AL–53 ITP signal abnormality II Detects abnormality in synchronization signal (ITPsignal) used in hardware.AL–54 Overload current alarm Detects that excessive current flowed in motor forlong time.Replace servo amp. PCB.Replace servo amp. PCB.Remove overload of motorand reset the alarm.AL–55Power line abnormality inspindle switching/outputswitchingDetects that switch request signal does not matchpower line status check signal.Check if power line status,check signal is processednormally.458