Panel Loss; External Fault; Stall Protection; Motor Thermal Protection - ABB ACS355 User Manual

Panel loss

Panel loss function defines the operation of the drive if the control panel selected as
the control location for the drive stops communicating.
Settings
Parameter 3002 PANEL COMM ERR

External fault

External faults (1 and 2) can be supervised by defining one digital input as a source
for an external fault indication signal.
Settings
Parameters 3003 EXTERNAL FAULT 1

Stall protection

The drive protects the motor in a stall situation. It is possible to adjust the supervision
limits (frequency, time) and choose how the drive reacts to the motor stall condition
(alarm indication / fault indication & drive stop / no reaction).
Settings
Parameters 3010 STALL
TIME

Motor thermal protection

The motor can be protected against overheating by activating the Motor thermal
protection function.
The drive calculates the temperature of the motor on the basis of the following
assumptions:
• The motor is in the ambient temperature of 30 °C when power is applied to the
drive.
• Motor temperature is calculated using either the user-adjustable or automatically
calculated motor thermal time constant and motor load curve (see the figures
below). The load curve should be adjusted if the ambient temperature exceeds
30 °C
and
FUNCTION, 3011 STALL FREQUENCY
Program features 145
3004 EXTERNAL FAULT 2
and 3012 STALL