7 Operation
−38−
Protection function
Number of
ALARM LED
flashes
Assumed causes
Overload
protection function
2 times
• When a load in excess of the rated torque
was applied to the motor for about 5 s or
more.
• When the motor running/instantaneous stop
and drive direction switching was repeated in
a short time.
Motor sensor error 3 times
When the sensor cable in the motor cable was
disconnected.
Overvoltage
protection function
4 times
• When the motor was used in an
elevating/lowering application or with a load
in excess of the permissible load inertia.
• When voltage applied to the driver has
exceeded the voltage setting (24 VDC) by
15% or greater.
Insufficient voltage
protection function
5 times
When voltage applied to the driver was less
than the voltage setting (24 VDC) by 25% or
greater.
Overspeed
protection function
6 times
When motor speed has reached an excess of
3500 r/min.
If the connection example on page 32 is followed, the ALARM output should
remain ON while the driver is normal and turn OFF if an alarm has occurred.
If the ALARM output has turned OFF, stop the motor operation and then remove the
cause that triggered the applicable protective function by referring to the number of
times the LED flashes. After remove the cause for activation of the protection
function, reset the ALARM (for ALARM-RESET input, see page 36).
Note
The START/STOP input and RUN/BRAKE input are not accepted when the
ALARM is OFF.
To Next Page
Loading...
