Chapter 7 Function for protection
59
① The U, V, W lead wires of
the motor are not
connected correctly.
② Cable lead wires of
encoder are not connected
correctly.
① Connect the wires
correctly.
Occurring in switching
on control power
supply
① The circuit board fault ① Change servo driver.
Occurring in switching
on main power supply
① Power supply voltage is
too high.
② Wave form of power
supply voltage is abnormal.
① Check power supply.
①The brake resistance
connection breaks off.
① Connect it again.
① Brake transistor is
damaged.
② Internal brake resistance
is damaged.
① Change servo driver.
Err-2
Main circuit
over-voltage
Occurring in motor
running
① The capacity of brake loop
is not enough.
① Reduce start-stop frequenc
② Increase acceleration/
deceleration time constant.
③ Reduce torque limit.
④ Reduce load inertia.
⑤ Change the driver and
motor with larger ones.
① Circuit board is at fault.
② Fuse of power supply is
damaged.
③ Soft start circuit fault
④ Rectifier is damaged.
① Change servo driver
Occurring in switching
on main power supply
① Power supply voltage is
low.
② Temporary power cut-off is
more than 20ms.
① Check power supply.
① Power capacity is not
enough.
② Instantaneous power
down
① Check power supply.
Err-3
Main circuit
under-voltage
Occurring in motor
running
①The Radiator is overheated. ① Check load.
Err-4
Orientation
oversize.
Occurring in switching
on control power
supply
① Circuit board is at fault. ①Change the servo driver.
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