15 - 82
MELSEC-Q
15 TROUBLESHOOTING
LED indicator
of servo
amplifier
Classifica
tion of
errors
Error
code
IFU DRU
Error name Description Cause
Don't using the regenerative brake
option.
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
2033
FA.33
—
Overvoltage
Converter bus voltage
exceeded 400VDC.
Power supply voltage high.
The SSCNET cable is
disconnected.
The SSCNE cable fault.
Noise has entered the SSCNE
cable.
The terminal connector is
disconnected.
2034
FA.34
—
CRC error
SSCNET cable communication
fault
The same No. exists in the interface
unit side axis setting.
Command given is greater than the
maximum speed of the servomotor.
Noise has entered the SSCNET
cable.
2035
—
@A.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
FA.36
—
Transfer error
SSCNET cable or printed board
is faulty.
The terminal connector is
disconnected.
Interface unit fault caused the IFU
parameter setting to be rewritten.
2037
FA.37
—
IFU parameter
error
IFU parameter setting is wrong.
There is a IFU parameter whose
value was set to outside the setting
range by QD75M.
Drive unit fault caused the DRU
parameter setting to be rewritten.
Servo
amplifier
errors
2037
—
@A.37#
DRU
parameter
error
DRU parameter setting is wrong.
There is a DRU parameter whose
value was set to outside the setting
range by QD75M.