Troubleshooting Malfunction Based On Operation And Conditions Of The Servomotor - YASKAWA SGMJV User Manual

9.4
Troubleshooting Malfunction Based on Operation and
Conditions of the Servomotor
Troubleshooting for the malfunctions based on the operation and conditions of the servomotor is provided in
this section.
Be sure to turn OFF the servo system before troubleshooting items shown in bold lines in the table.
Problem
The control power supply is not
ON.
The main circuit power supply is
not ON.
Wiring of I/O signal connector CN1
is faulty or disconnected.
Wiring for servomotor main circuit
cable or encoder cable is discon-
nected.
Overloaded
Encoder type differs from parame-
ter setting (Pn002.2).
Settings for the input signal selec-
Servomotor Does
tions (Pn50A, Pn50B and Pn511) is
Not Start
incorrect.
SV_ON command is not sent.
SENS_ON command is not sent.
The forward run prohibited (P-OT)
and reverse run prohibited (N-OT)
input signals are turned OFF.
The safety input signal
(/HWBB1 or /HWBB2) remains
OFF.
A SERVOPACK fault occurred.
Servomotor Servomotor wiring is incorrect.
Moves Instanta-
neously, and then
Encoder wiring is incorrect.
Stops
Servomotor Wiring connection to servomotor is
Speed Unstable defective.
Servomotor Ro-
tates Without Ref- A SERVOPACK fault occurred.
erence Input
Improper Pn001.0 setting
Dynamic Brake DB resistor disconnected
Does Not Operate
DB drive circuit fault

9.4 Troubleshooting Malfunction Based on Operation and Conditions of the Servomotor

Probable Cause
Check voltage between control
power terminals.
Check the voltage between main
circuit power terminals.
Check if the connector CN1 is prop-
erly inserted and connected.
Check the wiring.
Run under no load and check the
load status.
Check the settings for parameter
Pn002.2.
Check the settings for parameters
Pn50A, Pn50B and Pn511.
Check the command sent from the
host controller.
Check the command sent from the
host controller.
Check P-OT or N-OT input signal.
Check the /HWBB1 and /HWBB2
input signal.
−
Check the wiring.
Check the wiring.
Check connections of power line
(phases U, V, and W) and encoder
connectors.
−
Check the setting for parameter
Pn001.0.
Check if excessive moment of iner-
tia, motor overspeed, or DB fre-
quently activated occurred.
−
Investigative Actions
Correct the wiring.
Correct the wiring so that the main
circuit power supply turns ON.
Correct the connector CN1 connec-
tion.
Correct the wiring.
Reduce load or replace with larger
capacity servomotor.
Set parameter Pn002.2 to the
encoder type being used.
Correct the settings for parameter
Pn50A, Pn50B and Pn511.
Send the SV_ON command.
Send the command in the correct
SERVOPACK sequence.
Turn P-OT or N-OT input signal
ON.
Set the /HWBB1 and /HWBB2
input signal to ON.
When not using the safety function,
mount the safety function's jumper
connector (provided as an acces-
sory) on the CN8.
Replace the SERVOPACK.
Correct the wiring.
Correct the wiring.
Tighten any loose terminals or con-
nectors and correct the wiring.
Replace the SERVOPACK.
Correct the setting for parameter
Pn001.0.
Replace the SERVOPACK, and
reduce the load.
There is a defective component in
the DB circuit. Replace the SER-
VOPACK.
Corrective Actions
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