Commissioning
5.6 Function commissioning
SINAMICS V20 Inverter
Operating Instructions, 07/2012, A5E03728167
93
5.6.3.8 Setting the automatic restart function
Functionality
After a power failure (F3 "Undervoltage"), the automatic restart function (enabled using
P1210) automatically switches on the motor if an ON command is active. Any faults are
automatically acknowledged by the inverter.
When it comes to power failures (line supply failure), then a differentiation is made between
the following conditions:
● "Line undervoltage (mains brownout)" is a situation where the line supply is interrupted
and returns before the built-in BOP display has gone dark (this is an extremely short line
supply interruption where the DC link hasn't completely collapsed).
● "Line failure (mains blackout)" is a situation where the built-in BOP display has gone dark
(this represents a longer line supply interruption where the DC link has completely
collapsed) before the line supply returns.
Setting parameters
Parameter Function Setting
P1210 Automatic restart This parameter configures automatic restart function.
= 0: Disabled
= 1: Trip reset after power on, P1211 disabled
= 2: Restart after mains blackout, P1211 disabled
= 3: Restart after mains brownout or fault, P1211 enabled
= 4: Restart after mains brownout, P1211 enabled
= 5: Restart after mains blackout and fault, P1211 disabled
= 6: Restart after mains brown / blackout or fault, P1211
enabled
= 7: Restart after mains brown / blackout or fault, trip when
P1211 expires
P1211 Number of restart attempts This parameter specifies number of times inverter will attempt
to restart if automatic restart P1210 is activated.
Range: 0 ... 10 (factory default: 3)
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