Application: Emergency Stop With Power Failure And/Or Emergency Stop (Servo) - Siemens Sinamics S120 Function Manual

Applications

11.6 Application: emergency stop with power failure and/or emergency stop (Servo)

DC link line-up with more than one Control Unit
In the following example, two Control Units control drives that are connected to the same DC
link. The source for the "Infeed operation" signal is a digital input in the example.
Figure 11-11 Example: interconnection with more than one Control Unit
1) X_INF stands for all drive objects "Infeed"; i.e.: A_INF, B_INF, S_INF
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● r0722 CO/BO: CU digital inputs, status
● r0863.0...2 CO/BO: Drive coupling status word/control word
● p0864 BI: Infeed operation
11.6 Application: emergency stop with power failure and/or emergency
stop (Servo)
A drive line-up generally responds when the power fails with an OFF2, even when a Control
Supply Module and a Braking Module is being used. This means that the connected motors
coast down. The Control Supply Module provides the electronics with power via the supply
system or DC link. In this way, controlled movements can be made if a power failure occurs
provided that the DC link voltage is still available. The following section describes how all the
drives carry out a quick stop (OFF3) if the power fails.
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Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions