Troubleshooting For Malfunction Without Alarm Display - YASKAWA SGLFW User Manual

11.1.6 Troubleshooting for Malfunction without Alarm Display

The 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.
Symptom Cause
Linear Servo-
The control power supply is not ON.
motor Does
Not Start
The main circuit power supply is not
ON.
Wrong wiring or disconnection of
I/O signal connector CN1
Linear servomotor or serial converter
unit wiring disconnected.
Overloaded
Speed/position references not input
Setting for Pn50A to Pn50D "Input
Signal Selection" is incorrect.
/S-ON input signal stays OFF.
Control method selection is incor-
rect.
Reference pulse mode selection is
incorrect.
Speed control: Speed reference input
is incorrect.
Force control: Force reference input
is incorrect.
Position control: Reference pulse
input is incorrect.
The error clear counter (CLR) input
is turned ON.
The forward run prohibited (P-OT)
or reverse run prohibited (N-OT)
input signal is turned OFF.
The polarity detection is not exe-
cuted.
A SERVOPACK fault occurred.
Linear Servo- Servomotor wiring is incorrect.
motor Moves
Serial converter unit wiring is incor-
Instanta-
rect.
neously, and
Linear scale wiring is incorrect.
then Stops
Linear scale pitch (Pn280) is incor-
rect.
Linear scale counting up direction
and linear servomotor coil assembly
forward direction are not agreed.
Polarity detection is not performed
correctly.
Linear Servo- Wiring connection to servomotor is
defective.
motor Speed
Unstable
Table 11.7 Troubleshooting for Malfunction without Alarm Display
Inspection
Check voltage between control power sup-
ply terminals.
Check the voltage between power supply
terminals.
Check if the connector CN1 is properly
inserted and connected.
Check the wiring.
Run under no load.
Check reference input pins.
Check settings of parameters Pn50A to
Pn50D.
Check settings of parameters Pn50A.0 and
Pn50A.1.
Check parameter Pn000.1.
Check the parameter setting for the refer-
ence pulse mode (Pn200.0).
Check V-REF and SG to confirm if the con-
trol method and the input are agreed.
Check T-REF and SG to confirm if the con-
trol method and the input are agreed.
Check Pn200.0 reference pulse form or sign
+ pulse signal.
Check CLR or /CLR input pins (CN1-14
and -15).
Check P-OT or N-OT input signal.
Check the parameter Pn080.
Check /S-ON or /P-DET input signal.
A SERVOPACK board fault occurred.
Check the servomotor wiring.
Check the serial converter unit wiring.
Check the linear scale wiring.
Check the setting of Pn280.
Check the directions.
Check if the value of Un004 (Electrical
Angle 2) at an arbitrary position is between
±
10 degrees.
Check connection of power lead (phases U,
V, and W) and encoder connectors.
: Turn OFF the servo system before executing operations.
Correct the control power circuit.
Correct the power circuit.
Correct the connector CN1 connection.
Correct the wiring.
Reduce load or replace with larger capacity servomotor.
Input speed/position references correctly.
Correct the settings for Pn50A to Pn50D "Input Signal
Selection."
Correct the parameter setting and turn ON /S-ON input
signal.
Set parameters to match the application.
Correct setting of parameter Pn200.0.
Correct the control mode selection parameter, or the
input.
Correct the control mode selection parameter, or the
input.
Correct the setting of Pn200.0 or the input.
Turn CLR or /CLR input signal OFF.
Turn P-OT or N-OT input signal ON.
Correct the setting of Pn080.
Turn /S-ON or /P-DET input signal ON.
Replace the SERVOPACK.
Correct the servomotor wiring.
Correct the serial converter unit wiring.
Correct the linear scale wiring.
Correct the setting of Pn280.
Change the setting of Pn080.1 (Servomotor Phase Order
Selection).
Match the linear scale direction and coil assembly direc-
tion.
Correct the settings for the polarity detection related
parameter.
Tighten any loose terminals or connectors.
11.1 Troubleshooting
Corrective Actions
11-17
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