Commissioning
5.6 Function commissioning
SINAMICS V20 Inverter
Operating Instructions, 07/2012, A5E03728167
95
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.
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3
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● 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 Setting
P3852[0...2] BI: Enable frost protection 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
applied 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
overrides frost signal
• Issuing an OFF command while protection is active will
stop the motor
P3854[0...2] Condensation protection current [%] This parameter specifies the DC current (as a percentage of
nominal current) which is applied to the motor when
condensation protection is active.
Range: 0 ... 250 (factory default: 100)
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