SD710 Series Servo Drive User Manal Chapter 10 Troubleshooting
4
10.1.3 Operating exceptions in speed mode
After troubleshooting the above 10.1.1 Unable to enable problem, the Servo panel displays "On" when the following
phenomenon appears for the corresponding problem.
Table 10-2 Fault phenomenon and analysis when servo display "on" 2
Failure phenomena
Reasons
Confirmation method
Servo motor axis in
free running condition
Motor power cable not
connected
◆
Check that the motor side and side power cables U, V
and W are well connected.
Servo motor does not
rotate or rotates
incorrectly
when
speed command is
entered
Speed command is 0
◆
Wrong control mode selection.
Check if the control mode is speed mode (Pn000.X=1)
◆
Wrong speed command source selection.
Check that the Pn300 is set correctly.
◆
No speed command entered or speed command abnormal
1. Select internal digital timing (Pn300 = 0), check Pn304 setting
Is the placement correct?
2
、
Optional internal digital mixer (Pn300=4), check Pn300 ~
Is the Pn303S setting reasonable, in addition, the X input
terminal SPD- needs to be checked.
A. Is the SPD-B signal normal?
Input
speed
command,
Servo
motor rotation
Speed command is
negative
◆
Select internal digital timing (Pn300 = 0), check Pn304
Set whether it is less than 0.
◆
Select the internal digital mixing feed (Pn300=4) and check
Whether the setting of Pn300 to Pn303S is less than 0.
◆
Check that the X input terminal SPD-D direction signal is
normal.
10.1.4 Abnormal operation in torque mode
After troubleshooting the above 10.1.1 Unable to enable problem, the Servo panel displays "On" when the following
phenomenon appears for the corresponding problem.
Table 10-3 Fault phenomenon and analysis when servo display "on" 3
Failure
phenomena
Reason
s
Confirmation method
Servo motor
axis in free
running
condition
Motor
power
cable not
connect
ed
◆
Check that the motor side and side power cables U, V and W are well
connected.
Input torque
command,
servo motor
does
not
rotate
Torque
comman
d is 0
Wrong control mode selection.
Check if the control mode is torque mode (Pn000.X=2)
◆
The torque command source is incorrectly selected.
Check that the Pn400 is set correctly.
◆
Torque command not entered
1. Select the internal digital timing (Pn400.X = 0) and check that Pn410 is set
correctly.
2. Select the internal digital mix to give (Pn400.Y=3), check whether the settings of
Pn410 to Pn413 are reasonable, in addition, you need to check whether the X input
terminals Tor-A and Tor-B signals are normal.
Speed
◆
Speed limit in torque mode is 0