Siemens SINUMERIK 840D sl Function Manual page 384

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Multiple selection

A selection may only be carried out once. If the function is called once more due to faulty

programming (FXS[Axis]=1) the alarm 20092 "Travel to fixed stop still active" is initiated.

Programming code that scans $AA_FXS[] or a separate flag (here R1) in the condition will

ensure that the function is not activated more than once.

programming example (parts program fragment):

N20 IDS=1 WHENEVER ($R1 == 0 AND $AA_IW[AX3]>7) DO R1=1 FXS[AX1]=1

FXST[AX1] = 12

Blockrelated synchronized actions

By programming a blockrelated synchronized action, travel to fixed stop can be connected

during an approach motion.

Programming example:

N10 G0 G90 X0 Y0

N20 WHEN $AA_IW[X]>17 DO FXS[X]=1

N30 G1 F200 X100 Y110

; If X reaches a position greater

; 17mm FXS is activated

Basic logic functions: Travel to fixed stop (F1)

Function Manual, 11/2006, 6FC5397-0BP10-2BA0

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