Stroke Limit Warning; Error Excessive Warning - Mitsubishi Electric MELSERVO-JE Instruction Manual

1. SERVO AMPLIFIER TROUBLESHOOTING
Alarm No.: 99 Name: Stroke limit warning
Alarm content
Detail
Detail name
No.
99.1 Forward (1) The forward rotation
rotation stroke
end off
(2) The forward rotation
99.2 Reverse (1) The reverse rotation
rotation stroke
end off
(2) The reverse rotation
Alarm No.: 9B Name: Error excessive warning
Alarm content
Detail
Detail name
No.
9B.1 Excess droop (1) The servo motor power
pulse 1
warning
(2) The connection of the
(3) The connection of the
(4) The torque limit has
(5) A moving part collided
(6) The torque is
(7) Power supply voltage
(8) Acceleration/decelerati
(9) The position loop gain
The stroke limit signal is off.
Cause
Check if the limit
stroke limit switch is not switch is connected
connected. correctly.
Check if the forward
stroke limit was rotation stroke limit
exceeded during switch turned off.
driving.
Check if the limit
stroke limit switch is not switch is connected
connected. correctly.
Check if the reverse
stroke limit was rotation stroke limit
exceeded during switch turned off.
driving.
Droop pulses have exceeded the warning occurrence level.
Cause
Check the servo
cable was motor power cable.
disconnected.
Check the wiring of
servo motor is U/V/W.
incorrect.
Check if the encoder
encoder cable is cable is connected
incorrect. correctly.
Check if the limiting
been enabled. torque is in progress.
Check if it collided.
against the machine.
Check the peak load
insufficient. ratio.
Check the bus
dropped. voltage value.
Set a longer
on time constant is too deceleration time
short. constant, and then
check the
repeatability.
Increase the position
is small. loop gain, and then
check the
repeatability.
Check method Check result
It is not connected.
It is connected.
It turned off.
It is not connected.
It is connected.
It turned off.
Check method Check result
It is disconnected.
It is not
disconnected.
It is incorrect.
It is correct.
It is incorrect.
It is correct.
The limiting torque
is in progress.
The limiting torque
is not in progress.
It collided.
It did not collide.
The torque is
saturated.
The torque is not
saturated.
The bus voltage is
low.
The bus voltage is
high.
It is not repeatable.
It is repeatable.
It is not repeatable.
It is repeatable.
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Action Target
Connect it correctly. [A]
[C]
Check (2).
Check the operation
pattern.
Connect it correctly.
Check (2).
Check the operation
pattern.
Action Target
Repair or replace [A]
the servo motor [B]
power cable. [C]
Check (2).
Connect it correctly.
Check (3).
Connect it correctly.
Check (4).
Increase the torque
limit value.
Check (5).
Check the operation
pattern.
Check (6).
Reduce the load or
review the operation
pattern. Or use a
larger capacity
motor.
Check (7).
Check the power
supply voltage and
power supply
capacity.
Check (8).
Increase the
acceleration/deceler
ation time constant.
Check (9).
Increase the
position loop gain
([Pr. PB08]).
Check (10).