SMC Networks LECSN-T Series User Manual

8. TROUBLESHOOTING
8 - 61
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].

SMC Networks LECSN-T Series Specifications

General

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