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

5.6.3.10

Running the inverter in condensation protection mode

Functionality
If an external condensation sensor detects excessive condensation, the inverter applies a
DC current to keep the motor warm to prevent condensation.
● OFF1 / OFF3: The condensation protection function is disabled when OFF3 is activated
and enabled again when OFF1 is activated.
● OFF2 / fault: The motor stops and the condensation protection is deactivated.
Setting parameters
Parameter Function
P3852[0...2] BI: Enable frost protection
P3854[0...2] Condensation protection current [%]
SINAMICS V20 Inverter
Operating Instructions, 09/2014, A5E34559884
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 and P3854 ≠ 0, condensation protection is ap-
plied by applying the given current 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 DC current (as a percentage of
nominal current) which is applied to the motor when conden-
sation protection is active.
Range: 0 to 250 (factory default: 100)
Commissioning
5.6 Function commissioning
119