Lenze E94A - Manual (Page 180)

5 Function blocks
5.10 L_CamStretchFeed - stretching/compressing the position (relative)
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Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
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5.10 L_CamStretchFeed - stretching/compressing the position (relative)
This FB is used for relative stretching and compression of a position in the "modulo" or "unlimited"
traversing range. For this the FB differentiates the input position to a position difference and stret-
ches or compresses it. Afterwards the position difference stretched/compressed is integrated to a
continuous position for the "unlimited" traversing range, or cycle-related for the "modulo" traver-
sing range.
• The output continuous position can be directly transferred to the basic function "position follo-
wer" (LS_PositionFollower SB).
• Via the inputs dnNumerator and dnDenominator a free stretch factor for the speed transmission
can be defined. A changed stretch factor is only immediately accepted internally with a TRUE si-
gnal at the input bZero.
• Via the input bLoadStartPos the position output can be set to the starting position pending at
the input dnStartPos_p.
Inputs
Function library: LenzeCam FB permissible for firmware as of V3.0 only!
Runtime software licence:  Motion Control HighLevel  Motion Control TopLevel
Identifier/data type Information/possible settings
dnPosIn_p
DINT
Input position in [increments]
• C05447 indicates the input position in the real unit of the machine.
dnAccIn_x
DINT
Acceleration feedforward value
• For accepting the acceleration feedforward value for the y axis, given by
the L_CamProfiler FB, just connect this input with its output dnYAccOut_x.
• Selection as speed change/time in [rpm/s]
• Display parameter: C05448
dnFeedLength_p
DINT
Feed length of the current profile in [increments]
• For accepting the feed length for the y axis, output by the L_CamProfiler FB, you
simply connect this input to its output dnYFeedLength_p.
• Display parameter: C05449
dwFeedResidual
DWORD
Residual value of the feed length of the current profile
• For accepting the residual value for the y axis, output by the L_CamProfiler FB,
you simply connect this input to its output dwYFeedResidual.
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