Lenze E94A - Manual (Page 651)

Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
651
5 Function blocks
5.209 L_WndStopCtrl - stop controller
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5.209.1 Display of the residual length/residual runtime
Via the output dwLengthToRef the residual length until reaching the reference diameter
(dwRefDiameter) is provided.
• Via bRewind you define whether the reference diameter is to be smaller (unwinder) or greater
(rewinder) than the current diameter.
• If the reference diameter is reached or exceeded, the residual length is zero.
• Assuming that the maximum material speed dwReferenceLineSpeed is run, a corresponding re-
sidual runtime dwTimeToRef results from the residual length.
5.209.2 Activating the braking process
For the activation of the braking process, the residual length until reaching the reference diameter
is compared to the remaining length after the stop (dwResidualLength), including the change in
length during the braking phase (dwStopLength).
• The change in length during the braking phase is output at dwStopLength. It depends on the cur-
rent material speed which is calculated from dwReferenceLineSpeed and dnLineSpeed_n, and on
the reference deceleration time dwNominalTif.
• The signal for activating the braking process is output at bStartDec.
5.209.3 Triggering a limit stop
For the activation of a limit stop, the residual length until reaching the reference diameter is com-
pared to zero (current diameter equals reference diameter).
• The signal for triggering the limit stop is output at bRefReached.
5.209.4 Resetting the calculation & trigger signals
By setting bReset to TRUE, you can reset the stop controller and the two digital outputs for the acti-
vation of the braking process/limit stop.