INVT GD20-015G-4-EU

Goodrive20-EU series VFD Installation guide
24
STO mode
STO trigger and indication delay
1), 2)
STO fault: STL2
Trigger delay＜10ms, Indication delay＜280ms
STO fault: STL3
Trigger delay＜10ms, Indication delay＜280ms
STO fault: STO
Trigger delay＜10ms, Indication delay＜100ms
1)
STO trigger delay = the delay between triggering STO and cutting off drive output
2)
STO indication delay= the delay between triggering STO and indicating STO output state
3.3.3 Self-inspection on STO installation
Before installing STO, please perform self-inspection according to below table to ensure the
effectiveness of STO.
Actions
□
Ensure that the drive can be run and stopped freely during commissioning.
□
Stop the drive (if running), cut off input power and isolate the drive from the power cable
via the switch
□
Check STO circuit connection against circuit diagram.
□
Check that the shield of STO input cable is connected to +24V reference GND COM
□
Power on
□
Test the operation of STO when the motor is stopped:
▪ Give a stop command to the drive (if running) and wait until the motor shaft is at
standstill.
▪ Activate STO function and give a start command to the drive, ensure the motor stays
at standstill
▪ Inactivate STO circuit
□
Restart the drive and check if the motor runs normally
□
Test the operation of STO function when the motor is running:
▪ Start the drive and ensure the motor runs normally.
▪ Activate STO circuit。
▪ The drive reports STO fault (refer to fault and countermeasure in page X), ensure that
motor coast to stop and stops rotation.
▪Inactivate STO circuit
□
Restart the drive and check if the motor runs normally
3.4 Layout protection
3.4.1 Protecting the VFD and input power cable in short-circuit situations
Protect the VFD and input power cable in short circuit situations and against thermal overload.
Arrange the protection according to the following guidelines.