Flying Restart With Encoder - Siemens SINAMICS S150 NEMA Operating Instructions Manual

Converter cabinet units

Hide thumbs Also See for SINAMICS S150 NEMA:

Table of Contents

Fast flying restart with voltage acquisition via VSM10

The time for the connection to a rotating induction motor can be shortened when the terminal

voltage of the motor is measured.

Settings for the fast flying restart with voltage acquisition:

1. Select the voltage measurement for the fast flying restart: p0247.5 = 1.

2. Activate the flying restart: p1200 > 0.

The following status bits indicate the characteristic of the flying restart:

1. For V/f control: r1204.15

2. For vector control: r1205.18, r1205.19, r1205.20

Voltage amplitude must not be too small

If the measured voltage amplitude undershoots the 1% limit of the converter rated voltage,

the flying restart with voltage measurement is deactivated and the motor speed sought.

Flying restart with encoder

The flying restart function behaves differently with V/f control and vector control:

● V/f characteristic (p1300 < 20):

Flying restart without an encoder (see Chapter "Flying restart without an encoder")

● Vector control with a speed encoder:

Since the speed is known from the start, the motor can be magnetized immediately at the

appropriate frequency. The duration of magnetization is specified in p0346. Once the

excitation build-up time has elapsed, the ramp-function generator is set to the actual

speed value and the motor ramped up to the current setpoint speed.

Enclosed Drives

Operating Instructions, 12/2018, A5E36652151A

Unexpected movement of the motor when flying restart is activated

When the flying restart (p1200) function is active, the drive may still be accelerated by

the search current despite the fact that it is at standstill and the setpoint is 0!

For this reason, death, serious injury, or considerable material damage can occur if

personnel enter the working area of a motor in this state.

• Observe the general safety instructions.

• Ensure that the EMERGENCY STOP functions are always fully functional.

Functions, monitoring and protective functions

9.3 Drive functions