Lenze E94A - Manual (Page 636)

5 Function blocks
5.206 L_WndCalcLength - length calculation
636
Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
5.206.1 Display of the length/residual length/residual runtime reached
Via the output dnLength the length reached is displayed as a physical value [mm]. Negative values
can also be shown.
Via the output dwLengthToRef the residual length until reaching the reference value (dwRefLength)
is provided.
• Assuming that the maximum material speed dwReferenceLineSpeed is run, a corresponding re-
sidual runtime dwTimeToRef results from the residual length.
5.206.2 Activating the braking process
For the activation of the braking process, the current length 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.
5.206.3 Triggering a limit stop
For triggering a limit stop, the current length is compared to the reference length.
• The signal for triggering the limit stop is output at bRefReached.
5.206.4 Resetting the calculation & trigger signals
By setting bReset to TRUE, you can reset the length calculation and the two digital outputs for the
activation of the braking process/limit stop.