Siemens SINUMERIK 808D User Manual

Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
129
11.14
Program jumps
11.14.1
Unconditional program jumps
Fu n ctionality
NC programs process their blocks in the sequence in which they were arranged when they were written.
The processing sequence can be changed by introducing program jumps.
The jump destination can be a block with a
label
or with a
block number
. This block must be located within the program.
The unconditional jump instruction requires a separate block.
Programming
GOTOF label
;Jump forward (in the direction of the last block of the program)
GOTOB label
;Jump backwards (in the direction of the first block of the program)
Label
;Selected string for the label (jump label) or block number
See the following illustration for an example of unconditional jumps:
11.14.2
Conditional program jumps
Fu n ctionality
Jump conditions
are formulated after the
IF instruction
. If the jump condition (
value not zero
) is satisfied, the jump takes
place.
The jump destination can be a block with a
label
or with a
block number
. This block must be located within the program.
Conditional jump instructions require a separate block. Several conditional jump instructions can be located in the same
block.
By using conditional program jumps, you can also considerably shorten the program, if necessary.
Programming
IF condition GOTOF label
;Jump forward
IF condition GOTOB label
;Jump backwards
GOTOF
;Jump direction forward (in the direction of the last block of the pr
ogram)
GOTOB
;Jump direction backwards (in the direction of the fir
st block of the program)

Siemens SINUMERIK 808D Specifications

General

Brand	Siemens
Model	SINUMERIK 808D
Category	Control Unit
Language	English