05.91 11 Programming of Cycles
11.3 General instructions for program structure
Example for instruction form in the program:
L100 Call subroutine
@041 R61 R69
L
F
The contents of the R parameters from R 61 to R 69 are
transferred into the stack register and allocated the value
”0”.
.
.
.
@043 R61 R69
L
F
The saved values loaded back into the parameters
.
R 61 to R 69.
.
.
M17
L
F
Subroutine end
11.4 Program branches
The main group 1 is organized as follows:
@
1 x y Three-digit @ code
0: No compare operator
1: = Equal to
2: <> Not equal to
3: > Greater than
4: >= Greater than or equal to
5: < Smaller than
6: <= Smaller than or equal to
0: Absolute jump
1: CASE branch (compare operator = 1)
2: IF-THEN-ELSE instruction
3: WHILE instruction
4: REPEAT loop
5: FOR-TO loop
6: FOR-DOWNTO loop
1: Main group 1
With blocks in which jumps are programmed (@ 100 and following) the following points should
be observed:
• Auxiliary functions and traversing functions appearing in the same block are not executed
when the jump is being executed.
• Calculation with and allocations to R parameters preceding the jump command are
executed, but those following the jump command are not executed if a jump is being
executed.
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With the ”EXECUTION FROM EXTERNAL SOURCE” function only forward
jumps are possible in the part program.
© Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02 11–5
SINUMERIK 880, (PG)
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