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

Commissioning via the built-in BOP
5.6 Function commissioning
5.6.3.11

Running the converter in condensation protection mode

Functionality
If an external condensation sensor detects excessive condensation, the converter 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 [%]
122
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 applied by applying
the given current to the motor.
Note that the protection function may be overridden under the following cir-
cumstances:
If converter is running and protection signal becomes active, signal is
•
ignored
If converter 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
•
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 to 250 (factory default: 100)
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012