User Manual Of EL7-EC** AC Servo
276
Error
code
Main Sub
Display: “
Er 157”
15
7
Content: Encoder counter error
Cause
Diagnosis
Solution
Encoder data overflow
Verify if encoder is not
damaged
Initialize multiturn data
Absolute value
applications, motor
rotates in one direction
Verify if encoder is not
damaged
Adjust absolute value application
mode, set to turntable mode
Error
code
Main Sub
Display: “
Er 170”
17
0
Content: Encoder data error
Cause
Diagnosis
Solution
Communication
data abnormal
1. Verify if encoder power supply
voltage is DC5V
±
5% ;
2. Verify if encoder cable and shielded
layer is not damaged;
3. Verify if encoder cable is close to
high-powered power supply cable
1. Make sure encoder power supply
voltage is stable
2. Make sure encoder cable is not
damaged.
3. Make sure encoder cable shielded
layer is grounded to frame
4. Make sure encoder cable is away
from high-powered power supply
cable
Encoder damaged
/
Replace motor
Encoder measuring
circuit damaged
/
Replace driver
Error
code
Main Sub
Display: “Er
171”
17
1
Content: Encoder parameter initialization error
Cause
Diagnosis
Solution
Driver and motor
not matched
Verify driver and motor models.
Replace with matching driver and
motor
Error while getting
parameters from
encoder
1. Verify if encoder cable is standard.
2. Verify if encoder has no peeled
insulator, broken connection or
improper contact.
Use standard encoder cable, verify
the connection of both sides of driver
and motor, change encoder cable if
necessary
