Example: Execute jump until internal counter = 0

Ten lines are linked together by the relative mode. This results in a line movement to 100/100.

N00 G36 D10          (set the counter to 10)
N10 G91              (relative mode)
N20 G01 X10 Y10 F100 (motion by distance 10/10)
N30 G37 D-1          (decrement counter)
N40 G20 L20          (jump if counter != 0)

Example: Evaluate jump condition at time of decoding

Requirement: The behavior of the variable bvar is programmed in the application. If the x-axis exceeds the position 15, then bvar FALSE is set. (bVar is initially set to TRUE.)

In the first program cycle, the X position is 10 and the program jumps to line 20. The loop is continually run because the evaluation of the condi­tion takes place at the time of decoding and the interpolator was not started yet or is busy with the processing of objects at the beginning of the buffer. This condition fulfilled and the decoder jumps out of the loop only after enough objects are generated that the buffer is full and the interpolator begins processing.

In the second run, the x-axis is not yet at position 20. The condition is not fulfilled and bVar was not set to FALSE in the IEC code.

N0 G92 X0 Y0
N10 G91              (relative mode)
N20 G01 X10 Y10 F100 (move by distance 10/10)
N30 G20 L20 K$bvar$  (jump if counter != 0)

Example: Insert timing synchronization

G75 executes a timing synchronization of the interpolator. G75 pauses the decoder processing until the interpolator and the mechanics reach the respective position.

N0 G92 X0 Y0
N10 G91              (relative mode)
N20 G01 X10 Y10 F100 (move by distance 10/10)
N25 G75
N30 G20 L20 K$x$     (jump if counter != 0)

Example: Jump to jump label

N0 G16 F100 E100 E-100
N10 G20 L?4      //unconditional jump to the unknown target with index 4
N15 G20 L60
N20 G1 X1
N30 G1 X1 L!5    //resolution unknown jump target with index 5
N40 G1 Z1 L!4    //resolution unknown jump target with index 4
N50 G20 L15
N55 G1 Y1
N60 G0 X0 Y0 Z0