15 - 50
MELSEC-Q
15 TROUBLESHOOTING
Classifica
tion of
errors
Error
code
LED
indicator
of servo
amplifier
Error name Description Cause
Lead of built-in regenerative brake
resistor or regenerative brake option
is open or disconnected.
Though the regenerative brake
option is used, the DRU parameter
"
Pr.102
Regenerative brake
resistor "setting value is "0

00 (not
used)".
Regenerative brake option is open
or disconnected.
Regenerative transistor faulty.
Wire breakage of built-in
regenerative brake resistor or
regenerative brake option
Capacity of built-in regenerative
brake resistor or regenerative brake
option is insufficient.
2033 33 Overvoltage
Converter bus voltage exceeded
400VDC.
Power supply voltage high.
The SSCNET cable is
disconnected.
SSCNET cable fault.
Noise has entered the SSCNET
cable.
The terminal connector is
disconnected.
2034 34 CRC error SSCNET cable communication fault
The same No. exists in the servo
amplifier side axis setting.
Command given is greater than the
maximum speed of the servomotor.
Noise has entered the SSCNET
cable.
2035 35
Command pulse
frequency error
Input frequency of too high.
Fault in the QD75M.
The SSCNET cable is
disconnected.
The SSCNET cable fault.
Printed circuit board fault.
2036 36 Transfer error
SSCNET cable or printed board is
faulty.
The terminal connector is
disconnected.
Servo amplifier fault caused the
parameter setting to be rewritten.
2037 37 Parameter error Parameter setting is wrong.
Parameter data mis-setting by
QD75M.
Servo motor ambient temperature
exceeded the operating value of
40°C.
Servomotor overloaded.
Servo
amplifier
errors
2046 46
Servomotor
heated
Servo motor temperature rise
actuated the thermal protector.
Thermal protector in encoder is
faulty.