Instruction manual 91/121 V6.3
Installation
4.7 Restarting after an alarm
When the drive enters alarm status (DOK output = OFF and flashing of the red led FLT) it behaves as if suddenly lacked the enable
command (DEN = OFF), then the motor of the motor becomes free and is dragged by the load. It is therefore advisable to provide for
a mechanical braking system if this situation could cause danger.
If you have an alarm when the drive is enabled regularly, the DOK output goes to the OFF state, flashes the red FLT LED and the
alarm message appears on the LCD display. When the control system (PLC or CNC) detects this alarm state, the following sequence
shall be performed:
1. Immediately remove power supply (on L1, L2, L3 or DC+, DC-) and drive enable command (DEN = OFF).
2. Detect and whether it is possible to eliminate the cause that generated the alarm.
3. Reset the alarm with the digital input (RST = ON) or by pressing one of the buttons on the front.
4. Repeat the sequence of starting commands (page 20).
Alter Elettronica s.r.l.
21
