Voltage Sensing Module - Siemens Sinamics S120 Function Manual

Vector control

4.22 Voltage Sensing Module

Overview of important parameters (see SINAMICS S120/S150 List Manual)
● p3800[0...n] Sync-line-drive activation
● p3801[0...n] Sync-line-drive, drive object number
● p3802[0...n] BI: Sync-line-drive enable
● r3803 CO/BO: Sync-line-drive control word
● r3804 CO: Sync-line-drive target frequency
● r3805 CO: Sync-line-drive frequency difference
● p3806[0...n] sync-line-drive frequency difference threshold value
● r3808 CO: Sync-line-drive phase difference
● p3809[0...n] sync-line-drive phase setpoint
● p3811[0...n] sync-line-drive, frequency limiting
● r3812 CO: Sync line drive correction frequency
● p3813[0...n] sync-line-drive phase synchronism threshold value
● r3814 CO: Sync line drive voltage difference
● p3815[0...n] sync-line-drive voltage difference threshold value
● r3819.0...7 CO/BO: Status word, synchronizing
4.22 Voltage Sensing Module
Description
The Voltage Sensing Module (VSM) is required in the Vector Control and in V/f control for
following functions:
● Synchronizing
● Flying restart
200
Using the "synchronizing" function, the system is synchronized to an existing line supply.
For example, after synchronization the motor is directly switched over to the line supply
(bypass). A further application is to temporarily operate the motor from the line supply in
order to be able to carry out maintenance work on the drive converter without switching
off the plant.
For external actual voltage sensing (p3800 = 1), the voltage is sensed using a VSM which
is connected to the line phases. The voltage values must be transferred to the
synchronization via connectors r3661 and r3662.
After switch on, the "flying restart" function automatically connects a Motor Module to a
motor which may already be turning. In operation without an encoder, a search is carried
out initially for the motor speed.
For this function, a Voltage Sensing Module (VSM) is required for permanent-magnet
synchronous motors (for additional information, refer to reference: SINAMICS S Manual
Control Units).
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions