SMC Networks LECSB2-T Series User Manual

8. TROUBLESHOOTING
8 - 27
Alarm No.: 21
Name: Encoder normal communication error 2
Alarm content
The encoder detected an error signal.
Detail
No.
Detail name
Cause
Check method
Check result
Action
21.1
Encoder data
error 1
(1)
The encoder detected a
high speed/acceleration
rate due to an oscillation
or other factors.
Decrease the loop
gain, and then check
the repeatability.
It is not repeatable.
Use the encoder with low
loop gain.
It is repeatable.
Check (2).
(2)
The external conductor
of the encoder cable is
not connected to the
ground plate of the
connector.
Check if it is
connected.
It is not connected.
Connect it correctly.
It is connected.
Check (3).
(3)
An encoder is
malfunctioning.
Replace the servo
motor,
and then check the
repeatability.
It is not repeatable.
Replace the servo motor.
It is repeatable.
Check (4).
(4)
Something near the
device caused it.
Check the noise,
ambient
temperature, vibration,
etc.
There is a problem in
the
surrounding.
Take countermeasures
against its cause.
21.2
Encoder data
update error
(1)
An encoder is
malfunctioning.
Replace the servo
motor,
and then check the
repeatability.
It is not repeatable.
Replace the servo motor
It is repeatable.
Check (2).
(2)
The external conductor
of the encoder cable is
not connected to the
ground plate of the
connector.
Check if it is
connected
It is not connected.
Connect it correctly.
It is connected.
Check (3).
(3)
Something near the
device caused it.
Check the noise,
ambient
temperature, etc.
There is a problem in
the
surrounding.
Take countermeasures
against its cause
21.3
Encoder data
waveform error
Check it with the check method for [AL. 21.2].
21.4
Encoder
nonsignal
error
(1)
A signal of the encoder
has not been inputted.
Check if the encoder
cable is wired
correctly
It has a failure.
Review the wiring.
It has no failure.
Check (2).
(2)
The external conductor
of the encoder cable is
not connected to the
ground plate of the
connector.
Check if it is
connected.
It is not connected.
Connect it correctly.
It is connected.
Check (3).
(3)
Something near the
device caused it.
21.5
Encoder
hardware error
1
Check it with the check method for [AL. 21.2].
21.6
Encoder
hardware error
2
21.9
Encoder data
error 2
Check it with the check method for [AL. 21.1].

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English