SMC Networks LECSB2-T Series User Manual

8. TROUBLESHOOTING
8 - 25
Alarm No.: 20
Name: Encoder normal communication error 1
Alarm content
An error occurred in the communication between an encoder and driver.
Detail
No.
Detail name
Cause
Check method
Check result
Action
20.1
Encoder normal
communication
- Receive data
error 1
(1)
An encoder cable is
malfunctioning.
Check if the encoder
cable is disconnected
or shorted. When you
use an A/B/Z-phase
differential output linear
encoder, check the
wiring of the linear
encoder.
It has a failure.
Repair or replace the cable.
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)
The parameter setting
of communication
method is incorrect.
[Pr. PC22]
Check the parameter
setting.
The setting is
incorrect.
Set it correctly.
The setting is
correct.
Check (4).
(4)
In the parallel drive
system, the setting of
[Pr. PF40] is incorrect.
Check the parameter
setting.
The setting is
incorrect.
Set it correctly.
The setting is
correct.
Check (5).
(5)
The driver is
malfunctioning.
Replace the driver, and
then check the
repeatability.
It is not repeatable.
Replace the driver.
It is repeatable.
Check (6).
(6)
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 (7).
(7)
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.
20.2
Encoder normal
communication
- Receive data
error 2
Check it with the check method for [AL. 20.1].
20.3
Encoder normal
communication
- Receive data
error 3
20.5
Encoder normal
communication
- Transmission
data error 1
(2)
An encoder cable is
malfunctioning.
Check it with the check method for [AL. 20.1].
(3)
The external conductor
of the encoder cable is
not connected to the
ground plate of the
connector.
(5)
The driver is
malfunctioning.
(6)
An encoder is
malfunctioning.
(7)
Something near the
device caused it.

SMC Networks LECSB2-T Series Specifications

General

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