Parallel Connection Of Smart Line Modules - Siemens SINAMICS S120 Function Manual

Function modules
9.10 Parallel connection of power units
subsystems are controlled by a common Control Unit - even though the input voltages are 30°
out of phase.
There is also the redundant version with which two BLMs in each case are controlled by one
Control Unit.
If several Motor Modules are supplied from a non-regenerative infeed unit (e.g. a BLM), or for
power failure or overload (for SLM/ALM), the V
Module whose drive should have a high moment of inertia.
For the other Motor Modules, this function must be disabled or monitoring must be set.
If the V
effects on each other in the case of unfavorable parameter assignment. The drives may
become unstable and individual drives may unintentionally accelerate.
Remedy
● activate the V
– Vector control: p1240 = 1 (factory setting)
– Servo control: p1240 = 1
– U/f control: p1280 = 1 (factory setting)
● Inhibit V
– Vector control: p1240 = 0
– Servo control: p1240 = 0 (factory setting)
– U/f control: p1280 = 0
● Activate the V
– Vector control: p1240 = 4 or 6
– Servo control: p1240 = 4 or 6
– U/f control: p1280 = 4 or 6
9.10.1.2

Parallel connection of Smart Line Modules

Description
Smart Line Modules are infeed/regenerative feedback units. Like the Basic Line Modules, they
supply energy to the connected Motor Modules, but unlike the Basic Line Module, they are
capable of feeding back regenerative energy to the line supply.
Smart Line Modules in Chassis format are suitable for connection to grounded (TN, TT) and
non-grounded (IT) supply systems. The following voltages and power ratings are available:
Line voltage
38 to 480 V 3 AC
500 to 690 V 3 AC
522
control is active for multiple Motor Modules, then the controllers may have negative
dc_max
control:
dc_max
control:
dc_max
monitoring
dc_max
control may only be activated for a Motor
dc_max
Rated power
250 to 800 kW
450 to 1400 kW
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions