Commissioning via the built-in BOP
5.6 Function commissioning
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012
121
5.6.3.10 Running the converter 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
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, 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 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
P3853[0...2] Frost protection
frequency [Hz]
This parameter specifies the frequency applied to the motor when frost protection is
active.
Range: 0.00 to 550.00 (factory default: 5.00)
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