Instruction manual

142
Protective
Operation
Output is
shut OFF
and motor
coasts to
a stop.
Cycle power.
If the fault remains,
replace the inverter.
Option card fault
Replace the option card.
OPR(Operator
connecting fault)
Communication option card
DPRAM error
Communication option card
model code error
Communication option card
self diagnostic error
CE(MEMOBUS
communications fault)
Check the communication
devices or communication
signals.
STP(Emergency stop)
The inverter stops
according to constant n005
after receiving the
emergency stop fault
signal.
Check the external circuit
(sequence).
or
Stops
according to
constant
—
(OFF)
• Insufficient power
supply voltage
• Control power supply
fault
• Hardware fault
Check the following :
• Power supply voltage
• Main circuit power
supply wiring is
connected.
• Terminal screws are
securely tightened.
• Control sequence.
Replace the inverter.
For display/clear of fault history, refer to page 39.
Option card communications
fault
Communication fault has
occurred in a mode that run
command and frequency
reference are set from the
communication option card.
Check the
communication devices
or communication
signals.
Inverter
Status
Fault Display
RUN (Green)
ALARM (Red)
Digital
Operator
Explanation
Cauces and
Corrective Actions
FBL (PID feedback loss
detection)
PID feedback value drops
below the detection level.
When PID feedback loss is
detected, the inverter
operartes according to the
n136 setting.
Check the mechanical
system and correct the
cause, or increase the
value of n137.
Protective
Operation
Output is
shut OFF
and motor
coasts to
a stop.