ABB ACS850 - Page 144

144 Parameters
30.02 Speed ref safe Defines the safe speed reference that is used with the Spd ref
Safe setting of supervision parameters 13.32 AI superv func,
30.03 Local ctrl loss or 50.02 Comm loss func upon an alarm.
This speed is used when the parameter is set to Spd ref Safe.
-30000 … 30000
rpm
Safe speed reference. 1 = 1 rpm
30.03 Local ctrl loss Selects how the drive reacts to a control panel or PC tool
communication break.
No No action taken. 0
Fault Drive trips on fault LOCAL CTRL LOSS. 1
Spd ref Safe The drive generates alarm LOCAL CTRL LOSS and sets the
speed to the speed defined by parameter 30.02 Speed ref
safe.
WARNING! Make sure that it is safe to continue
operation in case of a communication break.
2
Last speed The drive generates alarm LOCAL CTRL LOSS and freezes
the speed to the level the drive was operating at. The speed
is determined by the average speed over the previous 10
seconds.
WARNING! Make sure that it is safe to continue
operation in case of a communication break.
3
30.04 Mot phase loss Selects how the drive reacts when a motor phase loss is
detected.
No No action taken. 0
Fault The drive trips on fault MOTOR PHASE. 1
30.05 Earth fault Selects how the drive reacts when an earth fault or current
unbalance is detected in the motor or the motor cable.
No No action taken. 0
Warning The drive generates alarm EARTH FAULT. 1
Fault The drive trips on fault EARTH FAULT. 2
30.06 Suppl phs loss Selects how the drive reacts when a supply phase loss is
detected.
No No action taken. 0
Fault The drive trips on fault SUPPLY PHASE. 1
30.07 Sto diagnostic Selects how the drive reacts when the drive detects that the
Safe Torque Off function is active while the drive is stopped.
The Safe Torque Off function disables the control voltage of
the power semiconductors of the drive output stage, thus
preventing the inverter from generating the voltage required
to rotate the motor. For the wiring of the Safe Torque Off
circuit, see the appropriate hardware manual.
Notes:
• This parameter is for supervision only. The Safe Torque Off
function can activate even when this parameter is set to
No.
• Fault STO 1 LOST / STO 2 LOST is activated if safety
circuit signal 1/2 is lost when the drive is in stopped state
and this parameter is set to Alarm or No.
Fault The drive trips on fault SAFE TORQUE OFF. 1
No. Name/Value Description FbEq