M Series AC Servo
User Manual
167
Rev. 1.0
7/31/2019
400-820-9661
Position error
Motor rotary velocity exceeds parameter
P-19 (VM) setting value.
Please check motor velocity command if it is within
the P-19 (VM) range.
1. Avoid high velocity command
2. Check the command pulse input frequency and
division/multiplication ratio.
3. Make a gain adjustment when an overshoot has
occurred due to a poor gain adjustment.
4. Make a wiring connection of the encoder as per
the wiring diagram.
CW limit or CCW
limit activated
CW and CCW limit is ON
1. External limit switch is triggered.
2. Check x5 and x6 limit settings, please refer to
chapter7.1.3 Cw/ccw limit.
CW limit is
activated
CCW limit triggered
1. External limit switch is triggered.
2. Check x5 and x6 limit settings.
CCW limit is
activated
CW limit triggered
Current limit
Driver
’
s output current exceeds setting value
P-18 (CP)
1. Load was heavy and actual torque has
exceeded the rated torque and kept running
for a long time.
2. Oscillation and hunching action due
to poor gain adjustment. Motor vibration,
abnormal noise.
3. Machine has collided or the load has
gotten heavy. Machine has been distorted.
1. Make a gain re-adjustment.
2. Increase the capacity of the driver and motor. Set
up longer acceleration/deceleration time. Lower the
load.
3. Check motor wirings for U/V/W as red/yellow/bule.
Communication
error
Drive and host communication error.
Please check wiring connection, and drive
’
s
communication address and baud rate setting.
Parameter save
failed
Saving parameter failure.
1. Please try to save again.
2. if problems is not solved, please contact MOONS
Phase loss of the
main circuit
- - - - - -
STO is activated
Safety torque off function is activated. Either
or both safety input 1 or 2 is ON.
Please confirm safety input 1 and 2 wiring
configuration.
Please check Safety sensor setting.
Regeneration
failed
Regenerative energy has exceeded the
capacity of regenerative resistor.
1. Due to the regenerative energy during
deceleration caused by a large load inertia,
converter voltage has risen, and the voltage
is risen further due to
the lack of capacity of absorbing this energy
of the regeneration discharge resistor.
2. Regenerative energy has not been
absorbed in the specified time due to a high
motor rotational speed.
1. Internal resistor value is smaller than required,
cannot absorb the regeneration energy.
2. Please check external regeneration resistor
connections.
3. Reduce rotary velocity and decrease acceleration
and deceleration value.
Low voltage
Drive voltage lower than 170VDC
1) Power supply voltage is low.
Instantaneous power failure has occurred
2) Lack of power capacity...Power supply
voltage has fallen down due to inrush current
at the main power-on.
3) Failure of servo driver (failure of the
circuit)
1) Increase the power capacity. Change the
power supply.
2) Please check l1, l2, l3 power connections, please
refer to 4.1.5 P1 drive power connection.
3) please contact moons.
Q program is
empty
Drive in Q mode, but Q program is empty.
1. Please check Q program.
2. Please check operation mode correction.
3. Please check Q program coding, make sure no
faults to stop the program running.
Move when the
drive is disabled.
Motion command is received while motor is
disabled.
Please enable the motor, and send the command
again.
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