Siemens SINUMERIK 840Di sl - Predefined Functions

Tables
12.4 List of predefined subprograms
Fundamentals
510 Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
SYNFCT INT: Number of
polynomial
function
defined with
FCTDEF.
VAR REAL:
Reference
variable*)
VAR REAL:
input variable**)
If the condition in the motion synchronous action is
fulfilled, the polynomial determined by the first
expression is evaluated at the input variable. The
upper and lower range of the value is limited and
the input variable is assigned.
FTOC INT: Number of
polynomial
function defined
with FCTDEF
VAR REAL:
input variable**)
INT: Length 1,
2, 3
INT: Channel
number
INT: Spindle
number
Modify tool fine compensation according to a
function defined with FCTDEF (polynomial no
higher than 3rd degree).
The number used here must be specified in
FCTDEF.
*) Only special system variables are permissible as result variables. These are described in
the Programming Guide Advanced in the section on "Write main run variable".
**) Only special system variables are permissible as input variables. These variables are
described in the Programming Guide Advanced in the list of system variables.
12.4.3 Predefined functions
Predefined functions
Predefined functions are invoked by means of a function call. Function calls return a value.
They can be included as an operand in an expression.
1. Coordinate system
Keyword/
function
identifier
Result 1st parameter 2nd parameter Explanation
CTRANS FRAME AXIS REAL: Offset 3. - 15.
Parameter
as 1 ...
4. - 16.
Parameter
as 2 ...
Translation: Zero offset
for multiple axes.
One axis identifier is
programmed at a time,
with its respective value
in the next parameter.
CTRANS can be used to
program offset for up to
8 axes.
CROT FRAME AXIS REAL:
Rotation
3./5.
Parameter
as 1 ...
4./6.
Parameter
as 2 ...
Rotation: Rotation of the
current coordinate
system.
Maximum number of
parameters: 6 (one axis
identifier and one value
per geometry axis)