Programming - Siemens SINUMERIK 840D sl Function Manual

16.4

Programming

Coded position
To allow indexing axes to be positioned from the NC part program, special instructions are
provided with which the indexing numbers (e.g. location numbers) are programmed instead of
axis positions in mm or degrees. The availability of a special instruction depends on the axis
type (linear or rotary axis):
Statement
CAC(i)
CACP(i)
CACN(i)
CDC(i)
CIC(i)
i:
Value range of i:
Examples
Program code
POS[B]=CAC(20)
POS[B]=CACP(10)
POS[B]=CACN(10)
POS[B]=CDC(50)
POS[B]=CIC(-4)
POS[B]=CIC(35)
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Effect
Traverse coded position in absolute terms
Traverse coded position ain absolute terms in
the positive direction
Traverse coded position ain absolute terms in
the negative direction
Traverse coded position along the direct
(shortest) path
Traverse coded position incrementally
Coded position (indexing position)
0 ... 59; whole number (positive and negative values are possible
in CIC)
Comment
Indexing axis B approaches the coded position (indexing) 20
in absolute mode. The direction of traversing depends on
the current actual position.
Indexing axis B approaches the coded position (index posi-
tion ) 10 in absolute mode with positive direction of rota-
tion (possible only for rotary axes).
Indexing axis B approaches the coded position (index posi-
tion ) 10 in absolute mode with negative direction of rota-
tion (possible only for rotary axes).
Indexing axis B approaches indexing position 50 directly
along the shortest path (possible only for rotary axes).
Indexing axis B traverses four indexing positions incremen-
tally from its current position. in a negative direction.
Indexing axis B traverses 35 indexing positions incremen-
tally from its present position in a positive direction.
T1: Indexing axes
16.4 Programming
Availability
Linear axis, rotary axis
Rotary axis
Rotary axis
Rotary axis
Linear axis, rotary axis
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