YASKAWA SGD7S series Product Manual

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YASKAWA SGD7S series Product Manual Manual pdf 169 page image

4.2 SERVOPACKs with MECHATROLINK-III Communications References4.2.7 Troubleshooting Based on the Operation and Conditions of the Servomotor4-1014 Maintenance4.2.7 Troubleshooting Based on the Operation and Conditionsof the ServomotorThis section provides troubleshooting based on the operation and conditions of the Servomo-tor, including causes and corrections.Turn OFF the Servo System before troubleshooting the items shown in bold lines in the table.Problem Possible Cause Confirmation Correction ReferenceServomotorDoes NotStartThe control power supply isnot turned ON.Measure the voltagebetween control powersupply terminals.Correct the wiring sothat the control powersupply is turned ON.–The main circuit power sup-ply is not turned ON.Measure the voltageacross the main circuitpower input terminals.Correct the wiring sothat the main circuitpower supply is turnedON.–The I/O signal connector(CN1) pins are not wired cor-rectly or are disconnected.Check the wiring condi-tion of the I/O signal con-nector (CN1) pins.Correct the wiring ofthe I/O signal connec-tor (CN1) pins.*The wiring for the Servomo-tor Main Circuit Cables orEncoder Cable is discon-nected.Check the wiring condi-tions.Wire the cable cor-rectly. –There is an overload on theServomotor.Operate the Servomotorwith no load and checkthe load status.Reduce the load orreplace the Servomo-tor with a Servomotorwith a larger capacity.–The type of encoder that isbeing used does not agreewith the setting of Pn002 =n.X (Encoder Usage).Check the type of theencoder that is beingused and the setting ofPn002 = n.X.Set Pn002 = n.Xaccording to the type ofthe encoder that isbeing used.*There is a mistake in theinput signal allocations(Pn50A, Pn50B, Pn511, andPn516).Check the input signalallocations (Pn50A,Pn50B, Pn511, andPn516).Correctly allocate theinput signals (Pn50A,Pn50B, Pn511, andPn516).*The SV_ON command wasnot sent.Check the commandssent from the host con-troller.Send the SV_ON com-mand from the hostcontroller.–The SENS_ON (Turn ONSensor) command was notsent.Check the commandssent from the host con-troller.Send the commands tothe SERVOPACK in thecorrect sequence.–The P-OT (Forward DriveProhibit) or N-OT (ReverseDrive Prohibit) signal is stillOFF.Check the P-OT and N-OT signals.Turn ON the P-OT andN-OT signals. *The safety input signals(/HWBB1 or /HWBB2) werenot turned ON.Check the /HWBB1 and/HWBB2 input signals.Turn ON the /HWBB1and /HWBB2 input sig-nals. If you are notusing the safety func-tion, connect the SafetyJumper Connector(provided as an acces-sory) to CN8.*The FSTP (Forced StopInput) signal is still OFF. Check the FSTP signal.• Turn ON the FSTPsignal.• If you will not use thefunction to force themotor to stop, setPn516 = n.X(FSTP (Forced StopInput) Signal Alloca-tion) to disable thesignal.*Continued on next page.