SMC Networks LECSN-T Series User Manual

8. TROUBLESHOOTING
8 - 59
(2)
The connection of the
servo motor is incorrect
Check the wiring of
U/V/W.
It is incorrect.
Connect it correctly.
It is correct.
Check (3).
(3)
The connection of the
encoder cable is
incorrect.
Check if the encoder
cable is connected
correctly.
It is incorrect.
Connect it correctly.
It is correct.
Check (4).
(4)
The torque limit has
been enabled.
Check if the limiting
torque is in progress.
The limiting torque is
in progress.
Increase the torque limit
value.
The limiting torque is
not in progress.
Check (5).
(5)
A moving part collided
against the machine.
Check if it collided.
It collided.
Check operation pattern.
It did not collide.
Check (6).
(6)
The torque isinsufficient.
Check the peak load
Ratio
The torque is
saturated.
Reduce the load or
review the operation
pattern. Or use a larger
capacity motor.
The torque is not
saturated.
Check (7).
(7)
Power supply voltage
dropped.
Check the bus voltage
value.
The bus voltage is
low
Check the power supply
voltage and power
supply capacity.
The bus voltage is
high.
Check (8).
(8)
Acceleration/
deceleration time
constant is too short.
Set a longer
deceleration time
constant, and then
check the
repeatability.
It is not repeatable.
Increase the
acceleration/deceleration
time constant.
It is repeatable.
Check (9).
(9)
The position loop gain
is small.
Increase the position
loop gain, and then
check the
repeatability.
It is not repeatable.
Increase the position
loop gain ([Pr. PB08]).
It is repeatable.
Check (10).
(10
)
Servo motor shaft was
rotated by external
force.
Measure the actual
position under the
servolock status.
It is rotated by
external force.
Review the machine.
It is not rotated by
external force.
Check (11).
(11)
An encoder is
malfunctioning.
Replace the servo
motor,
and then check the
repeatability.
It is not repeatable.
Replace the servo motor.
9B.3
Excess droop
pulse 2 warning
Check it with the check method for [AL. 9B.1].
9B.4
Error excessive
warning during
0 torque limit
(1)
The torque limit has
been 0.
Check the torque limit
value.
The torque limit has
been 0.
Do not input a command
while the torque limit
value is 0.
Alarm No.: 9F
Name: Battery warning
Alarm content
・
Battery voltage for absolute position detection system decreased.
Detail
No.
Detail name
Cause
Check method
Check result
Action
9F.1
Low battery
(1)
The battery is not
connected to CN4.
Check if the battery is
connected correctly.
It is not connected.
Connect it correctly.
It is connected.
Check (2).
(2)
The battery voltage is
low. The battery is
consumed.
Check the battery
voltage with a tester.
It is less than 4.9 V
DC.
Replace the battery.
9F.2
Battery
degradation
warning
(1)
The absolute position
storage unit has not
connected.
Check if the absolute
position storage unit is
connected correctly.
It is not connected.
Connect it correctly.
Alarm No.: E0
Name: Excessive regeneration warning
Alarm content
・There is a possibility that regenerative power may exceed permissible regenerative power of built-in
regenerative resistor or regenerative option.
Detail
No.
Detail name
Cause
Check method
Check result
Action
E0.1
Excessive
Regeneration
warning
(1)
The regenerative power
exceeded 85% of the
permissible regenerative
Check the effective
load ratio.
It is 85% or more.
Reduce the frequency of
positioning.
Increase the deceleration

SMC Networks LECSN-T Series Specifications

General

Brand	SMC Networks
Model	LECSN-T Series
Category	Controller
Language	English