Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

10.1 Troubleshooting10.1.7 Troubleshooting for Malfunction without Alarm DisplaySymptomServomotorDoes NotStartServomotorMoves Instantaneously,and thenStopsServomotorSuddenlyStops duringOperationand will NotRestartServomotorSpeed UnstableThe troubleshooting for the malfunctions that causes no alarm display is listed below.Contact your Yaskawa representative if the problem cannot be solved by the described corrective actions.CauseThe control power supply is not ON.The main circuit power supply is notON.Wrong wiring or disconnection ofI/O signal connector CN1Servomotor or encoder wiring disconnected.Table 10.8 Troubleshooting for Malfunction without Alarm DisplayInspectionCorrective Actions: Turn OFF the servo system before executing operations.Check voltage between control power supplyterminals.Correct the control power circuit.Check the voltage between power supply Correct the power circuit.terminals.Check if the connector CN1 is properly Correct the connector CN1 connection.inserted and connected.Check the wiring.Correct the wiring.Overloaded Run under no load. Reduce load or replace with larger capacity servomotor.Speed/position references not input Check reference input pins. Input speed/position references correctly.Setting for Pn50A to Pn50D “InputSignal Selection” is incorrect.Encoder type differs from parametersetting./S-ON input signal stays OFF./P-CON input function setting isincorrect.SEN input is turned OFF.Reference pulse mode selection isincorrect.Speed control: Speed reference inputis incorrect.Torque control: Torque referenceinput is incorrect.Position control: Reference pulseinput is incorrect.The error clear counter (CLR) inputis turned ON.The forward run prohibited (P-OT)or reverse run prohibited (N-OT)input signal is turned OFF.Check settings of parameters Pn50A toPn50D.Check incremental or absolute encoder.Check settings of parameters Pn50A.0 andPn50A.1.Check parameter Pn001.1.Check the SEN signal input (when absoluteencoder is used).Check the parameter setting for the referencepulse mode.Check V-REF and SG to confirm if the controlmethod and the input are agreed.Check V-REF and SG to confirm if the controlmethod and the input are agreed.Check Pn200.0 reference pulse form or sign+ pulse signal.Check CLR or /CLR input pins (CN1-14and -15).Check P-OT or N-OT input signal.Correct the settings for Pn50A to Pn50D “Input SignalSelection.”Set parameter Pn002.2 to the encoder type being used.Correct the parameter setting and turn ON /S-ON inputsignal.Set parameters to match the application.Turn SEN input signal ON.Correct setting of parameter Pn200.0.Correct the control mode selection parameter, or theinput.Correct the control mode selection parameter, or theinput.Correct the control mode selection parameter, or theinput.Turn CLR or /CLR input signal OFF.Turn P-OT or N-OT input signal ON.A SERVOPACK fault occurred. A SERVOPACK board fault occurred. Replace the SERVOPACK.Servomotor wiring is incorrect. Check the servomotor wiring. Correct the servomotor wiring.Encoder wiring is incorrect. Check the encoder wiring. Correct the encoder wiring.An alarm occurred while alarm resetsignal (ALM-RST) was turned ON.Wiring connection to servomotor isdefective.Check the alarm reset signal.Check connection of power lead (phases U,V, and W) and encoder connectors.Remove the cause of alarm. Turn alarm reset signal(ALM-RST) from ON to OFF.Tighten any loose terminals or connectors.1010-17