Position of the positive software limit switch

Positive software limit switch

The command G99 sets the positive SLS in the programmed axes.

• If G90 is active, the positive SLS is set absolute to the programmed value.
• If G91 is active, the programmed value is added relative to P-AXIS-00178.

G99 is active in each block; the software limit switches programmed using it are active cross-block.

Notice

The positions programmed with G99 for the positive SLS are stored in the axis-specific variables V.A.+SWE.X, V.A.+SWE.Y, V.A.+SWE.Z, etc. [PROG].

The variables are pre-assigned the value of P-AXIS-00178 of each axis at a reset, mode change or axis change.

Programing Example

Positive software limit switch

(Example 1 – absolute)

%swe_abs.nc
N110 G00 X0  Y0  G90
N120 G00 X20 Y30

(Sets pos. SLS in X to 100 and Y to 200)

N130 G99 X100 Y200

( .... )

(Example 2 – relative)

%swe_rel.nc
N110 G00  X0 Y0  G90
N120 G00 X20 Y30

(Offsets pos. SLS in X by -10 and Y by -20)

N130 G99  G91 X-10 Y-20

( .... )

Warnings, errors and reactions

• Warning P-ERR-21650: The controller uses G99 to calculate a position for the positive SLS that is greater than the position defined by P-AXIS-00178.

• Error message P-ERR-21878: The controller uses G99 to calculate a position for the positive SLS that is equal to or smaller than the position defined by P-AXIS-00177.

• Error message P-ERR-70021: The current actual position of the axis with G99 is greater than the new positive SLS.