ABB ACS850 - Page 22

22 Start-up
Limits
Set the operation limits according to the process
requirements.
Note: If load torque is suddenly lost when the drive is
operating in torque control mode, the drive will rush to the
defined negative or positive maximum speed. For safe
operation, ensure the set limits are suitable for your
application.
20.01…20.07
Motor overtemperature protection (2)
Set the alarm and fault limits for the motor
overtemperature protection.
31.03 Mot temp1 almLim
31.04 Mot temp1 fltLim
31.07 Mot temp2 almLim
31.08 Mot temp2 fltLim
Set the typical ambient temperature of the motor. 31.09 Mot ambient temp
If the temperature monitoring method (31.02 Mot temp1
src or 31.06 Mot temp2 src) is set to Estimated, the motor
thermal protection model must be configured as follows:
• Set the maximum allowed operating load of the motor
• Set the zero speed load. A higher value can be used if
the motor has an external motor fan to boost the
cooling
• Set the break point frequency of the motor load curve
• Set the motor nominal temperature rise
• Set the time inside which the temperature has reached
63% of the nominal temperature.
31.10 Mot load curve
31.11 Zero speed load
31.12 Break point
31.13 Mot nom tempRise
31.14 Mot therm time
If possible, perform the motor ID run again at this point
(see page 16).
99.13 Idrun mode
Fieldbus control
Follow these instructions when the drive is controlled from a fieldbus control system via
fieldbus adapter Fxxx. The adapter is installed in drive Slot 3.
Enable the communication between the drive and fieldbus
adapter.
50.01 Fba enable
Connect the fieldbus control system to the fieldbus
adapter module.
Set the communication and adapter module parameters:
See chapter Fieldbus control on page 243.
Test that the communication functions.