Siemens SINAMICS S120, Function Manual

Page: 920 / 1094

Applications
12.4 Quick stop in the event of a power failure or emergency stop (servo)
Drive functions
920
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
In addition to the component wiring shown above, each drive object that is to carry out a
quick stop if the power fails needs to be parameterized. If parameterization is not carried out,
the drive coasts down once a DC link undervoltage has been identified (OFF2). To
implement the OFF3 function (quick stop), the following parameters need to be set:
● p1240 = 5 (activates Vdc_min monitoring)
As well as the DC link monitor, which is always active, this activates another variable
alarm threshold, which should be set to a value above the undervoltage shutdown
threshold of 360 V ±2 % in p1248.
● p1 248 ≤ 570 V (for Active Line Modules)
p1248 ≤ 510 V (for Smart Line Modules)
This alarm level (in volts) indicates that the set value has been fallen below. Fault F07403
is triggered when this threshold is reached.
● p2100[x] = 7403
Here you change the response to fault F07403.
● p2101[x] = 3 (OFF3) response to the fault entered in p2100[x]