8.22 ALARM 414 (DIGITAL SERVO SYSTEM IS …

1 8. TROUBLESHOOTINGB 62755EN/01352 EXAMPLE OF DISPLAY AXIS NAME DETECTED IS DISPLAYED414 SERVO ALARM :X AXISDETECTIONSYSTEM ERRORC heck details by CNC s diagnostic fucntion and LED display on the )#70200#6LV#5 OVC#4 HCA#3 HVA#2 DCA#1 FBA#0 OFADGN2)LED display on the SERVO amplifierSTATUS* An ALARM detected on the SERVO amplifier isalso displayed at DGN )#70204#6 OFS#5 MCC#4#3#2#1#0 DGN#70200#6LV#5 OVC#4 HCA#3 HVA#2 DCA#1 FBA#0 OFADGN#6(LV): Low voltage ALARM LED [2] or [3] lights#5(OVC): Over current ALARM #4(HCA): Abnormal current ALARM LED [8] lights#3(HVA): Over current ALARM LED [1] lights#2(DCA): Discharge ALARM LED [4] or [5] lights#1(FBA): Disconnection ALARM #0(OFA): Overflow 414 (DIGITALSERVO SYSTEM ISABNORMAL)PointsDWhen DGN200 shows 1 B 62755 ) SERVO amp LED [2] turns on (control power shortage)Is voltagenormal ?

2 NOYES(START)Voltage isnormal ? SERVO amplifier isfaultyCheck input powerto the controller* Power should be 200/220/230 VAC 15%across terminal T1(13) and (14)Input voltage isabnormalNOYESC heck +5V powerat check terminal ofservo unitServo amplifier isfaulty2) SERVO amp LED [3] turns on (DC power shortage)Is voltagenormal ? SERVO amplifieris faultyNOYES(START)Breaker off ?Turn off breaker andcheck againCheck input volt-age of SERVO amp.* Power should be 200/220/230 VAC, 15%among terminal board T1(2) (3) (4).Input voltageis abnormalNOYESD#6(LV):Insufficientvoltage alarm8.

3 TROUBLESHOOTINGB 62755EN/01354 Larger times ?NOYES(START)Within ratedcurrent ?Check current at check termi-nal IR and IS at SERVO amplifi-er and compare with ratedcurrent of motorMove axis at low speedand measure current atIR and IS, and comparewith rated currentMachine load islarge. Check loadat machine SERVO parameters2040,2041,2056,2057 withparameter ? SERVO amplifier isfaulty Main CPU or option 2 board is parameters.* times for motor 20S 1st axis to 4th axis are main CPU board. 5th axis or later are option 2 : When the main CUP board is replaced, all the data in memory NC data, referring tochapter 3 input/output of data.

4 D#5(OVC):Over currentdetection by softwareB 62755 ?NO(START)Give a move commandand check wether thealarm is generatedRemove motor powerline and turn on powerAlarmed ? Short circuit between power lines Grounding of power lines Poor insulation of motorServo amp. is * Take care that verti-cal axis may #4(HCA):Abnormalcurrent ALARM ( SERVO amp. LED:[8]lights)8. TROUBLESHOOTINGB 62755EN/01356DC voltage in SERVO amp. is status whenan ALARM is generatedDoes the alarmgenerate duringdeceleration ?NO(Start)Is voltagenormal ?

5 SERVO amp. is faultyYESC onfirm input voltageof SERVO amplifierInput power voltage is abnormalCheck feed rateDoes the alarmgenerate dur-ing rapid tra-verse ? SERVO amp. is faulty Is acc/dec time is correct ? Isn t load inertial too large ? Is friction reduced by aging of machine ?Set timeconstant lager as atemporary measureRefer to param-eters 1600 and so should be within200/220/230 VAC among3 phases of terminalT1(2),(3) and (4)D#3(HVA):Over voltagealarm ( SERVO [1] lights)B 62755 SERVO amp LED 4 lights (discharge control circuit is abnormal)Generate atpower on ?

6 (START) SERVO amp. is faultyBalancer adjustment failureGenerate duringdeceleration ?Generate dur-ing lowering ofvertical axisCheck frequency of acceleration/decelerationFrequent ? SERVO amp. is faulty Mechanical load inertia is large Resistance for friction due to againg of machine is a larger time constantas a temporary measure.*Take care that deceleration dis-tance becomes type dis-charge resistor mustbe addedCheck by motor load currentduring up/down #2(DCA):Discharge alarm8. TROUBLESHOOTINGB 62755EN/013582 SERVO amp LED 5 lights (discharge circuit overheat)(Wired across 15 and 16 or T1)Generate atpower on?

7 (START)Is larger thanrated current ?Wired ?YESNONOYESIs unit hot ?Check resistanceacross terminalsT1(15) and (16).0W ?Measure load currentServo amp. is whether sep-arated discharge unitis connected(Across15 and 16 of T1) Check ambient temperature rise Lower cutting condition Machine side load is large Insulation of motor is poorMeasure reistanceacross 3 and 4 atterminal board ofseparate type dis-charge circuit across 15 and16 of terminal board T1 Separate type dischargeunit is faultyDisconnection ofcable between sep-arate type dischrgeunit and SERVO 3 4 15 160 VRVALMTHT1 Separate typedischarge unitServo amp.

8 (C series)Short betrween 15 and 16when not ?#7 ALD0201#6#5#4 EXP#3#2#1#0 DGN JFX SCALEXNote B 62755 detection signal line is disconnected or short 0 Built in serial pulse coderdisconnection1 1 Separate type positiondetector connection0 0 Pulse coder disconnec-tion (software)NOTEThis ALARM is related with full closed Signal cable is disconnected or short Serial pulse coder or position detector is faulty Refer to Notes Main CPU board or option 2 board is to Notes After the pulse coder is replaced, reference position ormachine s standard position is different from former and set it When the main CPU board is replaced, all the data storedin memory is lost.

9 Set NC data again, referring to chapter 3 input/output of data .PCLinear scaleMain CPU boardor Option 2 boardSCALExx is an axis numberServo amplifierJFxSERVOxJSxBFrom 1st axis to 4th axis are main CPU board. 5th axis or later areoption 2 #1(FBA):DISCONNECTION ALARMDC auses8. TROUBLESHOOTINGB 62755EN/013601 Wrong setting of SERVO parameters Main CPU (1axis to 4 axes) or option 2 board (5 axes or more)CAUTIONWhen the main CPU board is replaced, all the data storedin memory is lost. Set NC data again, referring to chapter3 input/output of data.

10 #70204#6 OFS#5 MCC#4#3#2#1#0 DGN#6(OFS): A/D converter used for current feedback in the digital SERVO is abnormal.#5(MCC): Contacts of electromagnetic contactor in the SERVO amp. is blown. LED7 pulse coder C is an incremental pulse CPU board or option 2 board is faultyWhen the main CPU board is replaced, all the data stored in memory NC data again, referring to chapter 3 input/output of data .(START)Correct? SERVO amplifier is faultyCheck LED ofservo amplifier[7] ?Check input powervoltage of SERVO magnetics circuitLED [7] Contacts of electro magnetic contactor is blown in SERVO amplifier<Normal input power voltage>AC200/220/230V+10%, 15%NO (Not lit)YESYESNOD#0(OFA):Overflow alarmcausesWhen 1 is displayed at DGN 204D#6(OFS):A/D converter isabnormalD#5(MCC).