Siemens Sinumerik 840D sl Programming Manual page 498

Tables
17.7 Predefined functions
Geometry functions
Identifier Return value
CALCDAT BOOL:
Error status
INTERSEC BOOL:
Error status
Curve table functions
Identifier Return
value
CTAB REAL:
Follow‐
ing axis
position
CTABINV REAL:
Follow‐
ing axis
position
CTABID INT:
Table
number
CTABISLOCK INT:
Lock
state
498
Parameter
1. 2.
VAR REAL [,2]: INT:
Table with input Number of input
points (abscissa points for calcu‐
and ordinate for lation
points 1, 2, 3, (3 or 4)
etc.)
VAR REAL [11]: VAR REAL [11]:
First contour ele‐ Second contour
ment element
Parameter
1. 2. 3.
REAL: INT: VAR RE‐
Leading Table AL[ ]:
axis posi‐ number Pitch re‐
tion sult
REAL: REAL: INT:
Leading Leading Table
axis posi‐ position number
tion
INT: STRING:
Entry Storage
number location:
in memo‐ "SRAM",
ry "DRAM"
INT:
Table
number
3.
VAR REAL [3]:
Result: Abscis‐
sa, ordinate and
radius of calcula‐
ted circle center
point
VAR REAL [2]:
Result vector: In‐
tersection coor‐
dinate, abscissa
and ordinate
4. 5. 6.
AXIS: AXIS:
Follow‐ Leading
ing axis axis for
for scal‐ scaling
ing
VAR RE‐ AXIS: AXIS:
AL[ ]: Follow‐ Leading
Pitch re‐ ing axis axis for
sult for scal‐ scaling
ing
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Explanation
Calculates radius and center
point of a circle from 3 or 4 points
(according to parameter 1),
which must lie on a circle. The
points must be different.
Calculation of intersection
The intersection between two
contour elements is calculated.
The intersection coordinates are
return values. The error status
indicates whether an intersec‐
tion was found.
Explanation
Determines the follow‐
ing axis position to the
specified leading axis
position from the curve
table
If parameters 4/5 are
not programmed, cal‐
culation is with stand‐
ard scaling.
Determines the lead‐
ing axis position to the
specified following ax‐
is position from the
curve table
If parameters 5/6 are
not programmed, cal‐
culation is with stand‐
ard scaling.
Returns the curve ta‐
ble number entered
under the specified
number in the memory
Returns the lock state
of the curve table
Fundamentals