System Variables For Electronic Gearbox - Siemens SINUMERIK 840D Function Manual

14.4.9

System variables for electronic gearbox

Application
The following system variables can be used in the part program to scan the current states of an
EG axis group and to initiate appropriate reactions if necessary:
Table 14-1 System variables, R means: Read access possible
Name Type
$AA_EG_ INT
TYPE[a,b]
$AA_EG_ REAL
NUMERA[a,b]
$AA_EG_ REAL
DENOM[a,b]
$AA_EG_ REAL
SYN[a,b]
$AA_EG_ REAL
SYNFA[a]
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
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part Sync part pro‐
pro‐ act. gram
gram
R R
R R
R R
R R
R R
Meaning, value
Sync
act.
Type of coupling:
0: actual value
1: Setpoint value coupling
Numerator of coupl. factor
KF
KF = numerator/denomina‐
tor
preset: 0
Number of curve table
when $AA_EG_DE‐
NOM[a,b] is 0.
Denominator of coupl. fact.
KF
KF = numerator/denomina‐
tor
preset: 1
Denominator must be posi‐
tive.
Denominator is 0, if instead
of the numerator
$AA_EG_NUMERA[a,b]
the number of a curve table
is specified.
Synchronized position for
specified leading axis
Default: 0
Synchronized position for
specified following axis
Default: 0
M3: Coupled axes
14.4 Electronic gear (EG)
Cond. Index
Axis name
a: Following axis
b: Leading axis
Axis name
a: Following axis
b: Leading axis
Axis name
a: Following axis
b: Leading axis
Axis name
a: Following axis
b: Leading axis
Axis name
a: Following axis
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