Lenze 8400 - Manual (Page 1324)

18 Function library
18.1 Function blocks | L_NLim_1
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Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
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• The parameterised blocking zones have the same effect on negative input signals.
• A blocking zone is deactivated by entering identical limit values (in our example: Blocking zone
3).
Overlapping of blocking zones
If blocking zones overlap, the lowest and highest value of the overlapping zones form a new zone.
In this case, the status display (wState output) will also just display one zone (the lower one of the
two original zones).
Abutting blocking zones
If two blocking zones abut (e.g. 20 ... 30 % and 30 ... 40 %), the limit value between the two zones (in
this example 30 %) is also passed through.
The same applies to a limit range of 0 ... xx %. At the zero crossing of the nIn_a input signal, a value
of "0" is also output at the nOut_a output. Value "0" cannot be excluded. If the nIn_a input signal
drops back to "0", the nOut_a output will retain the upper limit value.