Program Control Functions - Siemens SINUMERIK 828D Training Manual

Program Control Functions

Jump Instruction
The Jump Instructions and labels are used together. When the Jump is activated the
program will skip to the Label specified by the Jump.
The Jump Instruction needs to be parameterised with the number of the label to be
jumped to. The available range is from 0 to 255.
Jump Instruction has to be used in the same programming block.
Example of how a Jump/Label might be used.
SINUMERIK 828D
& Labels
Jump Instruction to Label 1 is not active.
I7.2 switches Q8.7 in the expected manner
Jump Instruction to Label 1 is active.
I7.2 does not switch Q8.7 because the program jumps
to Label 1.
Jump Instruction to Label 1 is active.
I7.2 does switch Q8.7 because it was high before the
program Jump Instruction was activated.
Jump Instruction to Label 1 is active.
Q8.7 remains high despite I7.2 being low this because
I7.2 was set low after the program Jump Instruction was
activated.
Page 25
Section 2
Notes
B019
B019