Siemens SINUMERIK 840D sl Programming Manual page 528

Axis couplings
11.4 Electronic gear (EG)
Curve tables
If a curve table is used for one of the leading axes:
Ni
Zi
LAi
For more information about using curve tables and cascading and synchronizing electronic
gears, please refer to:
References:
Function Manual Special Functions; Coupled Axes and ESR (M3), "Coupled Motion and
Leading Value Coupling".
Response of the Electronic gear at Power ON, RESET, mode change, block search
● No coupling is active after POWER ON.
● The status of active couplings is not affected by RESET or operating mode switchover.
● During block searches, commands for switching, deleting and defining the electronic gear
System variables of the electronic gear
By means of the electronic gear's system variables, the part program can determine the
current states of an EG axis grouping and react to them if required.
The system variables of the electronic gearbox are designated as follows:
$AA_EG_ ...
or
$VA_EG_ ...
References:
System Variables Manual
528
The denominator of the coupling factor for linear coupling must be set to 0.
(Denominator 0 would be illegal for linear couplings.) Denominator zero tells the
control that
is the number of the curve table to use. The curve table with the specified number
must already be defined at POWER ON.
The leading axis specified corresponds to the one specified for coupling via
coupling factor (linear coupling).
are not executed or collected, but skipped.
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
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