88 l_ldextrapolate - extrapolation, L_ldextrapolate, 5function blocks – Lenze E94A User Manual
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Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
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5
Function blocks
5.88
L_LdExtrapolate - extrapolation
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5.88
L_LdExtrapolate - extrapolation
This FB serves to extrapolate position information in order to e.g. compensate higher bus transmis-
sion cycles or smooth absolute value encoders with low resolution. A forced extrapolation is also
possible.
• The LenzeServoDrive library (as of V02.00.xx.xx) provides the FB
for interpola-
Inputs
Function library:
LenzeLineDrive
Runtime software licence:
Motion Control HighLevel
Motion Control TopLevel
Identifier/data type
Information/possible settings
bEnable
BOOL
Activate extrapolation
FALSE The master value at dnPosIn_p is connected through 1:1 to the out-
put dnPosOut_p.
TRUE The master value at dnPosIn_p is output to dnPosOut_p depending
on the input bForce and the number of the extrapolation cycles set in
C05000.
bForced
BOOL
Forced extrapolation
FALSE Extrapolation is only executed if the input value in the task cycle
does not change, for instance, since the fieldbus cycle is longer and
does not provide new position values in the task cycle.
TRUE Extrapolation is executed irrespective of master value changes.
dnPosIn_p
DINT
Position of the external, and, as the case may be, insufficiently resolved master shaft
in [inc].
AxisData
Machine parameters
• For accepting the machine parameters of the drive/motor, connect this input
with the output DI_AxisData of the SB LS_DriveInterface.
• The machine parameters of a master drive can be displayed with the
FB
. In this case, the FB output AxisData must be connected to
this input.
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