Lenze i550 - Troubleshooting; Error Message Display

5.5 Starng performance
The start can be oponally made with DC braking or ying restart circuit. Moreover, an auto-
mac start can be acvated aer switch-on.
Details
The start method can be selected in 0x2838:001 (P203.01). The following diagram demon-
strates the dierent start methods:
t
0 Hz
30 Hz
10 Hz
20 Hz
40 Hz
50 Hz
60 Hz
0 Hz
30 Hz
10 Hz
20 Hz
40 Hz
50 Hz
60 Hz
t
t
t
0 Hz
30 Hz
10 Hz
20 Hz
40 Hz
50 Hz
60 Hz
0 Hz
30 Hz
10 Hz
20 Hz
40 Hz
50 Hz
60 Hz
t
t
0 Hz
30 Hz
10 Hz
20 Hz
40 Hz
50 Hz
60 Hz
t
5 5 5
0x2838:001
0x2838:001
0x2838:001
0x2DDD
0x2838:001
= Premagnetisation [3]
DC brake
= flying restart circuit [2]
= DC braking [1]
= normal [0]
DC brake
DC brake
Digital input 2 [12]
Run
Digital input 1 [11]
Output signals
Output frequency
Enable inverter
Input signals
Frequency setpoint selection
FunctionTrigger
① Start method = "Normal [0]": Aer the start command, the motor is accelerated to the setpoint with the set acceleraon me.
② Start method = "DC braking [1]": Aer the start command, the "DC braking" funcon is acve. Only aer the hold me set in 0x2B84:002
(P704.02) has elapsed is the motor accelerated to the setpoint with the set acceleraon me.
4DC braking ^ 196
③ For demonstrang the ying restart circuit: At the me of the start command, the motor is not at a standsll (for instance due to loads with
high inera such as fans or ywheels).
④ Start method = "Flying restart circuit [2]": Aer the start command, the ying restart circuit is acve. The ying restart circuit serves to
restart a coasng motor on the y during operaon without speed feedback. The synchronicity between inverter and motor is coordinated
so that the transion to the rotang motor is eected without jerk at the me of connecon.
4Flying restart circuit ^ 188
⑤ Start method = "Pre-magnesaon [3]": normal start and premagnesaon - this seng corresponds to the seng [0] normal, but adds the
premagnesaon of the motor before the motor rotaon begins. The premagnesaon property is generally relevant when operang in V/f
motor control modes.
Some asynchronous motors which have a lower stator resistance can experience high amperages when accelerang from a stopped/deac-
vated state. The premagnesaon property can reduce the motor current during the acceleraon and is able to generate a more even
acceleraon curve with this motor. A property of the start method is a slight delay before the motor acceleraon begins.
Basic seng
Starng performance
43