SD710 Series Servo Drive User Manal Chapter 10 Troubleshooting
11
ER.910
Motor or overload
Display before the Servomotor or Servo is about to reach
an overload (ER.710 or ER.720) fault. If operation continues,
an ER.710 or ER.720 fault alarm may occur.
ER.911
Motor vibration warning
Servo detects abnormal vibrations in the motor during
operation. The threshold value for detecting abnormal
vibrations is the same as the ER.520 fault detection value. It
can be switched off or on by means of function code Pn185.
ER.920
Regeneration overload
warning
Display before the Servo is about to reach a regenerative
overload (ER.320) fault. If operation continues, an ER.320 fault
may occur.
ER.921
Dynamic Brake (DB) overload
warning
Display before the Servo is about to reach a dynamic brake
overload (ER.730) fault. If operation continues, an ER.730 fault
may occur.
ER.930
Battery undervoltage for
absolute Encoder
The servo detects a warning indication of low battery
voltage in the absolute encoder
ER.931
Abnormal external terminal jog
signal
For external terminal jog (JOGP/JOGN), both positive and
negative jog signals are given. For normal use, the positive or
negative jog signal is given separately.
ER.940
ServoON signal anomaly
(Enabled when bus voltage is
not established).
When the DC bus voltage has not yet been established, the
enable signal (SON) is given via the input terminals or the
internal register. For normal use, wait until the bus voltage
has been established before assigning the corresponding
enable signal.
ER. 941
Function code re-powered to
take effect
The function code needs to be re-powered to take effect.
ER. 950
Single tube self-lifting anomaly
When enabled, the motor speed is greater than the Rated
speed.
ER. 955
External power failure
External power failure
ER. 971
Undervoltage warning
Warning indication that the Servo's current main circuit bus
voltage is below the Pn786 setting and that an undervoltage
(ER.410) fault may occur if operation continues.
ER. 9A0
Positive overtravel warning
The servo detects an overtravel signal (P-OT) during operation.
ER. 9A1
Negative overtravel warning
The servo detects an overtravel signal (N-OT) during operation.
ER. 9A2
ServoON speed limit in
progress
The servo is speed limited when the speed exceeds the
function code Pn270 setting at the moment of ON or at the
moment of limit withdrawal, so please set this value
appropriately for safety in practice.
