11 Programming of Cycles 05.91
11.4 Program branches
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Main group 1/subgroup 0: Absolute jump
@100 <Const> oder @100 <R-Par>
The jump target (block number) and the direction of jump are specified with the constant
or R parameter (pointer not allowed). A positive block number means that the block to be
jumped to is in the direction of the end of the program, and if the block number is negative
then the block will be found in the direction of the beginning of the program.
If the sign points in the wrong direction, the control will not find the block even if it is
contained in the program (alarm 3012: ”Block does not exist”).
Examples:
@100 K375 Unconditional jump to block N375 in the direction of end of program
@100 K-150 Unconditional jump to block N150 in the direction of beginning of
program
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Main group 1/subgroup 1: CASE branch
@111 <Var> <Value 1> <Const 1>
<Value 2> <Const 2>
..
..
..
<Value n> <Const n>
@100 K..
The notation <Var> is compared successively with the various notations <Value...>.
If the compare function has been satisfied, the program branches to the block number
programmed under the notation <Const ...>.
If the comparison has not been satisfied, processing continues in the program at the next
block.
This block is not allowed to have a block number of its own and must contain an absolute
jump (@100) to the program continuation.
This jump must always be written even if the next block is the one next in the sequence of
execution. A block number with the address ”N” or ”:” is not allowed.
Example for CASE branch:
Application of a CASE branch in a cycle with switchable axes
Jump to block N900 (end of program)
N475 @111 R11 K1 K480 R11 = 1
K2 K485 R11 = 2
K3 K490 R11 = 3
@100 K900 R11 is neither 1, nor 2 nor 3
N480 . . .
@100 K495
N485 . . .
@100 K495
N490 . . .
N495 . . .
11–6 © Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02
SINUMERIK 880, (PG)
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