Efficient Networks Siemens Sinamics S120 - Manual (Page 466)

Applications
11.6 Application: emergency stop with power failure and/or emergency stop (Servo)
Drive Functions
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Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
carried out, the drive coasts down once a DC link undervoltage has been identified (OFF2).
To implement the OFF3 function (emergency 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.
● p1248 = Active Line Module <= 570 V, Smart Line Module <= 510 V
(alarm threshold in V). When this threshold is reached, fault 7403 is triggered. This
threshold indicates that the set value has been undershot.
● p2100.0 = 7403
(Number of the fault for which a response is to be defined.)
● p2101.0 = 3 (OFF3) response to the fault entered in p2100.0