Oriental motor AXH Series, Operating Manual

Page: 26 / 32

5 Connection
－ 26 －
ALARM output
The protection function of the driver activates in following cases, and the ALARM
output is turned off (H level), thereby stopping the motor. In this case, you can check
the contents of the protection function which was operating by the number of LED
flashes.
The LED lights for 0.3 s and goes off for 0.3 s. After a specified number of flashes,
flashing is performed at intervals of 1.5 s.
WARNING
When the driver’s protection function is triggered, first remove
the cause and then clear the protection function. Continuing
the operation without determining the cause of the problem
may cause malfunction of the motor, leading to injury or
damage to equipment.
•
Overload protection function (two flashes of LED)
When a load in excess of the rated torque is applied to the motor for about 5 s or
more, or when the motor running/instantaneous stop and drive direction switching is
repeated in a short time.
•
Open-phase protection function (three flashes of LED)
Prevents motor malfunction when the sensor cable within the motor cable is
disconnected during motor operation. (An alarm signal will not be output while the
motor is at a standstill.)
•
Overvoltage protection function (four flashes of LED)
When the motor is used in an elevating/lowering application or with a load in excess
of the permissible load inertia, or when voltage applied to the driver has exceeded
the voltage setting (24 VDC) by 15% or greater.
• Insufficient voltage protection function (five flashes of LED)
When voltage applied to the driver is less than the voltage setting (24 VDC) by 25%
or greater.
•
Overspeed protection function (six flashes of LED)
When motor speed has reached an excess of 3500 r/min.
If the ALARM output is connected as illustrated by the example of connection given
on page 21, the level will be low when the driver is normal (ON), and will be high
during ALARM output (OFF).
When the ALARM output is off (H level), remove the cause for activation of the
protection function (refer to the number of times of LED flashing) after motor
running has stopped. After remove the cause for activation of the protection function,
reset the ALARM (For ALARM-RESET input, see page 24.).
Note The START/STOP input and RUN/BRAKE input are not accepted when the
ALARM is off (H level).