Siemens SINAMICS S150 NEMA, Operating Instructions Manual

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Functions, monitoring and protective functions
9.3 Drive functions
Enclosed Drives
526
Operating Instructions, 12/2018, A5E36652151A
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.
Parameters
•
p1206[0...9] Faults without automatic restart
•
p1210
Automatic restart mode
•
p1211
Automatic restart, start attempts
•
p1212
Automatic restart, delay time start attempts
•
p1213
Automatic restart monitoring time
•
r1214
Automatic restart status
Settings
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.
9.3.6 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.