Leading Value Coupling (Leadon, Leadof) - Siemens SINUMERIK 840D sl Programming Manual

Motion synchronous actions
10.4 Actions in synchronized actions
10.4.22

Leading value coupling (LEADON, LEADOF)

Function
The axial leading value coupling can be programmed in synchronized actions without
restriction. The changing of a curve table for an existing coupling without a previous
resynchronization is optionally possible only in synchronized actions.
Programming
Activate leading value coupling
DO LEADON (following axis, leading axis,
curve table no., OVW)
Deactivate leading value coupling
DO LEADOF(following axis, leading axis,
leading axis 2)
Parameters
Activate axial leading value
coupling:
...DO LEADON(FA, LA, NR, OVW)
Deactivate axial leading value
coupling:
...DO LEADOF(FA, LA)
... DO LEADOF(FA)
Activate access with synchronized actions RELEASE
The axis to be coupled is released for synchronized action access by invoking the RELEASE
function for the axis.
Example:
RELEASE (XKAN)
ID=1 every SR1==1 to LEADON(CACH,XKAN,1)
OVW=0 (default value)
Without a resynchronization, no new curve table can be specified for an existing coupling.
A change of the curve table requires the previous deactivation of the existing coupling and a
reactivation with the changed curve table number. This causes a resynchronization of the
coupling.
Changing the curve table for an existing coupling using OVW=1
OVW=1 can be used to specify a new curve table to an existing coupling. No
resynchronization is performed. The following axis attempts as fast as possible to follow the
position values specified by the new curve table.
10-56
with:
FA: Following axis
LA: Leading axis
NR: Number of the stored curve table
OVW: Permit overwriting an existing coupling
with changed curve table
with:
FA: Following axis
LA: Leading axis, optional
Shortened form without specification of
leading axis
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
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