Functions, monitoring, and protective functions
9.2 Drive functions
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
395
Faults without automatic restart (p1206)
Up to 10 fault numbers for which the automatic restart should not be effective can be
selected via p1206[0...9].
The parameter is only effective if p1210 = 6 and p1210 = 16.
p1206[0...9]
Faults without automatic restart
p1210
p1211
Automatic restart, start attempts
p1212
Automatic restart, delay time
start attempts
p1213
Automatic restart monitoring time
r1214
To prevent the motor from switching to phase opposition when the drive is being restarted,
there is a delay while the motor demagnetizes (t = 2.3 x motor magnetization time constant).
Once this time has elapsed, the inverter is enabled and the motor is supplied with power.
Flying restart
Description
The "Flying restart" function (enabled via p1200) allows the converter to switch to a motor
that is still rotating. Switching on the converter without the flying restart function would not
allow any flux to build up in the motor while it is rotating. Since the motor cannot generate
any torque without flux, this can cause it to switch off due to overcurrent (F07801).
The flying restart function first determines the speed of the drive with which V/f or vector
control is initialized so that the converter and motor frequency can be synchronized.
During the standard start-up procedure for the converter, the motor must be at a standstill.
The converter then accelerates the motor to the setpoint speed. In many cases, however,
the motor is not at a standstill.
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