SD710 Series Servo Drive User Manal Chapter 10 Troubleshooting
17
deceleration time
factor.
◆
Check the regeneration warning
display.
regeneration resistor.
8. Servo failure.
◆
The main circuit power was
reconnected several times, but the fault
was still reported.
Replace the servo.
Error code
ER. 400
Overvoltage
Reason
The dc bus voltage between P /- exceeds the fault value:.
AC220V Drivers : normal value 310V, fault value 400V.
AC380V Drivers: normal value 540V, fault value 800V.
Treatment.
Reasons
Confirmation method
Handling measures
1. The main circuit input
voltage is too high.
◆
Check the input power specifications.
Measure the main circuit side (L1, L2, L3)
input voltages for compliance with the
following specifications.AC220V Drivers
Valid values: 220V - 240V
Allowable deviation: ± 10% (196V-264V)
AC380V Drivers
Valid values: 380V-440V
Allowable deviation: ± 10% (342V-484V)
Refer to the specifications on the
left and replace or adjust the
input power supply.
2. Power supply in
unstable condition
state, or were affected by
lightning strikes.
◆
Monitor the input power for lightning
strikes and measure if the input power is
stable and meets the above specifications.
After connecting the surge
suppressor, switch on the control
power and mains power and
replace the Servo if a fault still
occurs.
3. Failure of the built-in
braking resistor.
If the built-in brake resistor is used,
confirm whether B2/B3 is connected
reliably with wires, if so, measure the
resistance value between P/B3
If the resistance value is infinity
"∞", the brake resistor is
internally disconnected:.
If using an internal braking
resistor, adjust to use an external
braking resistor and remove the
wire between B2/B3, the resistor
resistance and power supply can
be selected to match the internal
braking resistor.
4. External braking
resistor failure.
◆
If an external braking resistor is used,
measure resistance value between P /B2.
If the resistance value is infinity
"∞", the braking resistor is
disconnected.
If an external braking resistor is
used, replace it with a new one
and reconnect it between P
/B2.
5. The resistance value
of
external
braking
resistor is too large, and
◆
Measure the resistance value
between P /B2 and compare it with the
recommended value.
Replace the external braking
resistor with an advance value
and reconnect it between P