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MELSEC-Q
15 TROUBLESHOOTING
Classifica
tion of
errors
Error
code
LED
indicator
of servo
amplifier
Error name Description Cause
Command given is greater than the
maximum speed of the servomotor.
Noise has entered the SSCNET
cable.
2035 35
Command
frequency error
Input pulse frequency of command
pulse is too high.
Fault in the QD75MH.
The SSCNET cable is
disconnected.
The surface at the end of SSCNET
cable got dirty.
The SSCNET cable is broken or
severed.
2036 36 Receive error 2 SSCNET communication error
Noise entered the servo amplifier.
Servo amplifier fault caused the
parameter setting to be rewritten.
Parameter data mis-setting by
QD75MH.
2037 37 Parameter error Parameter setting is wrong.
The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, etc.
Servo amplifier faulty.
The power supply was turned on
and off continuously by overloaded
status.
Ambient temperature of servo
amplifier is over 55°C.
2045 45
Main circuit
device over
heated
Main circuit device overheat
Used beyond the specifications of
close mounting.
Servomotor ambient temperature
exceeded the operating value of
40°C.
Servomotor overloaded.
2046 46
Servomotor
overheate
Servomotor temperature rise
actuated the thermal protector.
Thermal protector in encoder is
faulty.
Cooling fan life expiration.
Foreign matter caught in the fan
stopped rotation.
Servo
amplifier
errors
2047 47
Cooling fan
alarm
The cooling fan of the servo amplifier
stopped, or its speed decreased to or
below the alarm level.
The power supply of the cooling
fan failed.