Reference Point Approach (G74) - Siemens Sinumerik 840D sl Programming Manual

Program code
...
N51 $P_WORKAREA_CS_COORD_SYSTEM[2]=1
N60 $P_WORKAREA_CS_PLUS_ENABLE[2,X]=TRUE
N61 $P_WORKAREA_CS_LIMIT_PLUS[2,X]=10
N62 $P_WORKAREA_CS_MINUS_ENABLE[2,X]=FALSE
N70 $P_WORKAREA_CS_PLUS_ENABLE[2,Y]=TRUE
N73 $P_WORKAREA_CS_LIMIT_PLUS[2,Y]=34
N72 $P_WORKAREA_CS_MINUS_ENABLE[2,Y]=TRUE
N73 $P_WORKAREA_CS_LIMIT_MINUS[2,Y]=–25
N80 $P_WORKAREA_CS_PLUS_ENABLE[2,Z]=FALSE
N82 $P_WORKAREA_CS_MINUS_ENABLE[2,Z]=TRUE
N83 $P_WORKAREA_CS_LIMIT_PLUS[2,Z]=–600
...
N90 WALCS2
...
Further information
Effectivity
The working area limitation with WALCS1 - WALCS10 acts independently of the working area
limitation with WALIMON. If both functions are active, that limit becomes effective which the
axis motion first reaches.
Reference point at the tool
Taking into account the tool data (tool length and tool radius) and therefore the reference point
at the tool when monitoring the working area limitation corresponds to the behavior for the
working area limitation with WALIMON.
15.4

Reference point approach (G74)

When the machine has been powered up (where incremental position measuring systems are
used), all of the axis slides must approach their reference mark. Only then can traversing
movements be programmed.
The reference point can be approached in the NC program with G74.
Syntax
G74 X1=0 Y1=0 Z1=0 A1=0 ... ; Programmed in a separate NC block
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Supplementary commands
15.4 Reference point approach (G74)
Comment
; The working area limitation of
working area limitation group 2
applies in the WCS.
; Activate working area limita-
tion group 2.
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