SMC Networks LECSB2-T Series User Manual

8. TROUBLESHOOTING
8 - 64
Alarm No.: E3
Name: Absolute position counter warning
Alarm content
・The multi-revolution counter value of the absolute position encoder exceeded the maximum range.
・Absolute position encoder pulses are faulty.
・An update cycle is short for writing multi-revolution counter value of the absolute position encoder
to EEP-ROM.
Detail
No.
Detail name
Cause
Check result
Action
Target
E3.1
Multi-revolution
counter travel
distance excess
warning
(1)
The travel distance
from the home position
is 32768 rev or more in
the absolute position
system.
Check the value of the
multi-revolution
counter.
It is 32768 rev or
more.
Review operation range.
Execute the home
position return again.
After the power is surely
cycled, perform home
position return again.
E3.2
Absolute
position counter
warning
(1)
Something near the
device caused it.
Check the noise,
ambient
temperature, etc.
There is a problem in
the
surrounding.
Take countermeasures
against its cause.
After the power is surely
cycled, perform home
position return again.
There is no problem
in the surrounding.
Check (2).
(2)
An encoder is
malfunctioning.
Replace the servo
motor,and then check
the repeatability.
It is not repeatable.
Replace the servo motor.
E3.4
Absolute
positioning
counter
EEPROM
writing
frequency
warning
(1)
A home position was
renewed (EEP-ROM
write) twice or more in
10 minutes in the driver
due to rotation
to the same direction in
short time in the point
table method of the
positioning mode,
degree setting with the
program method, or the
indexer method.
Check if the operation
was within the following
conditions between the
number of gear teeth
on machine side ([Pr.
PA06] CMX) and servo
motor speed (N).
• When CMX 2000,
N
< 3076.7 r/min
• When CMX > 2000, N
< 3276.7 - (CMX × 0.1)
r/min
• When (CMX/CDV) is
reduced to its lowest
terms, CMX 15900
The operation was
out of conditions.
Set the command speed
within the conditions.
Set the number of gear
teeth on machine side
within the conditions.
After the power is surely
cycled, perform home
position return again.
E3.5
Encoder
absolute
positioning
counter
warning
Check it with the check method for [AL. E3.2].
Alarm No.: E5
Name: ABS time-out warning
Alarm content
・A response from the programmable controller was over 5 s at the absolute position erased data
transfer.
・ABSM (ABS transfer mode) turned off during the absolute position erased data transfer.
・SON (Servo-on), RES (Reset), or EM2/EM1 (Forced stop) turned off during the absolute position
erased data transfer.
Detail
No.
Detail name
Cause
Check method
Check result
Action
E5.1
Time-out during
ABS data
transfer
(1)
The wiring of I/O
signals is incorrect.
Check if the I/O signal
wire is disconnected or
connected loosely.
It has a failure.
Repair or replace the I/O
signal wire.
It has no failure.
Check (2).
(2)
The sequence program
is incorrect.
Check the sequence
program.
The sequence
program is incorrect.
Modify the sequence
program.
E5.2
ABSM off
during ABS
data transfer
Check it with the check method for [AL. E5.1].
E5.3
SON off during
ABS data
transfer

SMC Networks LECSB2-T Series Specifications

General

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