Troubleshooting Malfunction Based On Operation And Conditions Of The Linear Servomotor - YASKAWA Σ-V Series User Manual

8.3
Troubleshooting Malfunction Based on Operation and
Conditions of the Linear Servomotor
Troubleshooting for the malfunctions based on the operation and conditions of the linear servomotor is pro-
vided in this section.
Be sure to turn OFF the servo system before troubleshooting items outlined in bold in the table. .
Problem
The control power supply is not
ON.
The main circuit power supply is
not ON.
Wrong wiring or disconnection of I/
O signal connector CN1
Linear servomotor or serial con-
verter unit wiring disconnected.
Linear
Servomotor Does
Not Start When
Using JOG
The polarity detection is not exe-
Operation or Host
cuted.
Controller
Reference.
The safety input signal (/HWBB1 or
/HWBB2) remains OFF.
A SERVOPACK fault occurred.
Overloaded
Speed/position references not input Check reference input pins.
Settings for Pn50A and Pn50B
"Input Signal Selection" are incor-
Linear
rect.
Servomotor Starts
in JOG Operation Linear scale type differs from
but Does Not Start parameter setting (Pn002.2).
by Host Controller
A servo ON command was not
Reference.
input.
A sensor ON command was not
input.
The forward run prohibited (P-OT)
or reverse run prohibited (N-OT)
input signal is turned OFF.

8.3 Troubleshooting Malfunction Based on Operation and Conditions of the Linear Servomotor

Probable Cause
Check voltage between control
power supply terminals.
Check the voltage between power
supply terminals.
Check if the connector CN1 is prop-
erly inserted and connected.
Check the wiring.
Check the parameter Pn080.
Check the command sent from the
host controller.
Check the /HWBB1 or /HWBB2
input signal.
–
Run under no load.
Check settings of parameters
Pn50A and Pn50B.
Check the linear scale type and set-
ting of parameter Pn002.2.
Check the command sent from the
host controller.
Check the command sent from the
host controller.
Check P-OT or N-OT input signal.
Investigative Actions
Correct the control power circuit.
Correct the power circuit.
Correct the connector CN1 connec-
tion.
Correct the wiring.
Correct the setting of Pn080.
When using an incremental linear
scale, send the servo ON command.
When using an absolute linear
scale, execute polarity detection
(Fn080).
Set the /HWBB1 or /HWBB2 input
signal to ON.
When not using the safety function,
mount the safety function jumper
connector (provided as an acces-
sory) on the CN8.
Replace the SERVOPACK.
Reduce load or replace with a larger
capacity linear servomotor.
Input speed/position references cor-
rectly.
Correct the settings for Pn50A and
Pn50B "Input Signal Selection."
Set parameter Pn002.2 to the linear
scale type being used.
Send a servo ON command.
Send the command in the correct
sequence to the SERVOPACK.
Turn P-OT or N-OT input signal
ON.
Corrective Actions
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