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9. Protection Function
9-1. Type of Alarm
When an alarm occurs while the controller is operating, a red LED flashs and the
following protective function will be displayed according to the number of LED flash
counting
Times
Alarm name
Condition
1
Over Current Error
The current through power devices in drive exceeds 4.8A
2
Over Speed Error
Motor speed exceeds 3,000 [rpm]
3
Position Tracking
Error
Position error value is higher than 90˚in motor run state *1
4
Over Load Error
The motor is continuously operated more than 5 seconds
under a load exceeding the max. torque
5
Over Temperature
Error
Inside temperature of drive exceeds 85
℃
6
Over Regenerative
Voltage Error
Back-EMF is higher than 70V
7
Motor Connect Error
The power is ON without connection of the motor cable to
drive
8
Encoder Connect
Error
Cable connection error in Encoder connection of drive
10
In-Position Error
After operation is finished, a position error occurs
12
ROM Error
Error occurs in parameter storage device(ROM)
15
Position Overflow
Error
Position error value is higher than 90˚ in motor stop state *2
*1. The setting value [pulse] in ‘Pos Tracking Limit[No.24]’parameter
*2. The setting value[pulse] in ‘Pos Error Overflow Limit[No28]’ parameter
9-2. Acquiring the Alarm Information
When an alarm occurs, the motor become Servo OFF and then stops by free run and at the
same time
displays alarm message. It is display the alarm number on 7-Segment for alarm ID
display purpose. Also, ‘AlarmBlink’ signal repeats On/Off according to the timing as
illustrated below. The red LED flash every 0.5 second in accordance with alarm number
and wait for 2 seconds. And then red LED flash repeatedly until inputting ‘AlarmReset’
signal.
(Example) Alarm 3
：
‘AlarmBlink’ display signal occurred when the step-out is occurred
