Siemens sinumerik 840d Programming Manual page 322
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Path Traversing Behavior
9
9.4 Axial leading value coupling, LEADON, LEADOF
840D
840D
NCU 571
NCU 572
NCU 573
Leading value simulation with setpoint coupling
Via machine data, you can disconnect the
interpolator for the leading axis from the servo. In
this way you can generate setpoints for setpoint
coupling without actually moving the leading axis.
Leading values generated from a setpoint coupling
can be read from the following variables so that they
can be used, for example, in synchronized actions:
- $AA_LEAD_P
- $AA_LEAD_V
Additional notes
As an option, leading values can be generated with
other self-programmed methods. The leading values
generated in this way are written into the variables
- $AA_LEAD_SP
- $AA_LEAD_SV
and read from them. Before you use these variables,
setting data $SA_LEAD_TYPE = 2 must be set.
Status of coupling
You can query the status of the coupling in the NC
program with the following system variable:
$AA_COUP_ACT[axis]
0
16
Deactivate leading value coupling, LEADOF
When you deactivate the leading value coupling, the
following axis becomes a normal command axis
again!
Axial leading value coupling and different
operating states
Depending on the setting in the machine data, the
leading value couplings are deactivated with RESET.
9-322
810D
840Di
No coupling active
Leading value coupling active
Leading value position
Leading value velocity
Leading value position
Leading value velocity
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
08.97
9
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