YASKAWA SGM Series User Manual page 199

Maintenance and Inspection
12.2.2 SERVOPACK
Alarm Code
(Alarm/Warning History)
"72"
Continuous overload
"80"
Absolute encoder error
"81"
Backup error
12
"82"
Checksum error
"83"
Battery error
"84"
Absolute encoder data
error
"85"
Overspeed
"C1"
Servo overrun Servo overrun
"C2"
Phase error detection Phase error detection
"C3"
Broken encoder PA-, PB-
phase wire
"C4"
Broken encoder PC-
phase wire
"C5"
Initial pulse error
Status When Lit
Lit during operation
Operation resumes after turn-
ing power OFF and ON.
Lit during driving
Lit several seconds after power
ON
Lit several seconds after power
ON
Lit several seconds after power
ON
At power ON
Lit several seconds after power
ON
Lit soon after Servomotor
started to run
Lit 1 to 3 seconds after power
ON.
Lit during driving
Lit soon after Servomotor
started to run
Lit soon after Servomotor
started to run
At the SENS_ON or CONFIG
command transfer d t f
Cause
Load greatly exceeds the rated torque
from tens seconds to hundreds se-
cond.
Faulty absolute encoder wiring or
connection
SERVOPACK miscounted pulses
Number of encoder pulses setting in-
correct.
Absolute encoder backup voltage
dropped
Absolute encoder memory data
check failed
Absolute encoder battery voltage
dropped
Absolute encoder malfunctioned
Servomotor rotated at power ON.
Servomotor wiring incorrect or dis-
connected
Encoder wiring incorrect or discon-
nected
Faulty encoder wiring or connection
Noise in encoder wiring
Encoder defective
Faulty encoder wiring or connection
Noise in encoder wiring
Encoder defective
Faulty encoder wiring (PA, PB) or
connection
Faulty encoder wiring (PC) or con-
nection
Incorrect encoder type setting
Faulty encoder
Faulty control board (1PWB)
12 -6
Remedy
Review the load. (overload)
Check to see if the Phase-A, -B
and -C pulse wiring is correct
at 2CN, and repair if necessary.
S Turn power OFF, reset and
turn power ON.
S Separate encoder wiring
from main wiring circuits.
Reset the number of encoder
pulses correctly.
Follow the absolute encoder
setup procedures.
Follow the absolute encoder
setup procedures.
Replace the battery and turn
power ON twice.
Replace the Servomotor if the
error occurs frequently.
Turn power ON with the Ser-
vomotor stopped.
Check wiring and connectors at
the Servomotor.
Check wiring and connectors at
the encoder.
Check wiring and connectors at
the encoder.
Separate encoder wiring from
main wiring circuits.
Replace Servomotor.
Check wiring and connectors at
the encoder.
Separate encoder wiring from
main wiring circuits.
Replace Servomotor.
Check wiring and connectors at
the encoder.
Check wiring and connectors at
the encoder.
Reset the encoder type.
Replace the encoder.
Replace SERVOPACK.