Running The Inverter In Frost Protection Mode - Siemens SINAMICS V20 Operating Instructions Manual

Commissioning
5.6 Function commissioning
5.6.3.9

Running the inverter in frost protection mode

Functionality
If the surrounding temperature falls below a given threshold, motor turns automatically to
prevent freezing.
● OFF1 / OFF3: The frost protection function is disabled when OFF3 is activated and
enabled again when OFF1 is activated.
● OFF2 / fault: The motor stops and the frost protection is deactivated.
Setting parameters
Parameter Function
P3852[0...2] BI: Enable frost protection
P3853[0...2] Frost protection frequency [Hz]
118
Setting
This parameter defines command source of protection enable
command. If binary input is equal to one, then protection will
be initiated (factory default: 0).
If P3853 ≠ 0, frost protection is applied by applying the given
frequency to the motor.
Note that the protection function may be overridden under the
following circumstances:
If inverter is running and protection signal becomes active,
•
signal is ignored
If inverter is turning motor due to active protection signal
•
and a RUN command is received, RUN command over-
rides frost signal
Issuing an OFF command while protection is active will
•
stop the motor
This parameter specifies the frequency applied to the motor
when frost protection is active.
Range: 0.00 to 550.00 (factory default: 5.00)
Operating Instructions, 09/2014, A5E34559884
SINAMICS V20 Inverter