Variables and calculation of variables

Under variables, on the one hand an internal data of the decoder with a fixed name assignment is to be understood, and on the other hand there are self-defined variables, whose designation is essentially freely selectable. Excepting external variables (V.E...) their validity and use is limited exclusively to the NC channel.

General syntax is:

V. <NAME_1>. <NAME_2>. <NAME_3>.{<NAME_n>.}

V. indicates the accessing of the variables

<NAME_1>. the global data designation:

"A." represents axis-specific variables,

"SPDL." represents spindle-specific variables,

"G." represents inter-axis, globally valid variables,

"E." represents external variables,

"P." represents self-defined, non-inter-program, non-global variables,

"L." represents self-defined, non-inter-program, local variables,

"S." represents self-defined, inter-program, global variables.

<NAME_2>. specifies the data name

<NAME_3>. e.g. the index, if several data of the same kind are to be distinguishable.

Programming of the axis identification

The last identification code represents the axis-code of axis-specific and a few of the group-specific variables. Thereby the designations

".X" or "[0]",

".Y" or "[1]",

".Z" or "[2]"

are to be optionally used, if in the channel parameters [1]-27 the name "X" is assigned to the axis with the index 0, the name "Y" to the axis with the index 1 and the name "Z" to the axis with index 2.

Example: Absolute coordinate of the X-axis:

V.A.ABS.X or V.A.ABS[0]

Similar for spindle specific variables the spindle names or the corresponding indices according to the channel parameter data set are to be used.

".S" or "[0]",

".S2" or "[1]", …

Example: Logical axis number of the S-spindle:

V.SPDL.LOG_AX_NR.S or V.SPDL.LOG_AX_NR[0]

Programming example

Both lines bring about a linear interpolation in X-direction around the value of the variables V.A.BZP.Y (coordinate preset in Y-direction).

N10 G92 X0 Y40 Z0 (Position preset) 
N20 G91 G01 F1000 XV.A.BZP.Y 
N30 XV.A.BZP[1] (here: Axis index 1 == Y ) 
N40 M30 

The content can be read from all variables and to a few of them also a value can be assigned. The access type is firmly given for each variable, however generally only a reading access is allowed. Because for most of the variables a writing access is not practical.

Programming example

Here, the 2. zero offset vector for the axis with the index 1 is assigned with the value 100:

N10  V.G.NP[2].V[1] = 100

The EXIST-function (see chapter 2.6.1.3) checks, if a variable generally is available.

Programming examples

By the EXIST-request on an axis specific variable it is checked, if in NC-channel a special axis generally is available.

.. 
N10 G90 Y0 
N20 $IF EXIST[V.A.LOG_AX_NR.X] == TRUE 
N30 X-10 (X-axis is in channel, move to position –10) 
N40 $ELSE 
N50 #CALL AX [X,1,0] (X-axis is not in channel, first request axis) 
N60 $ENDIF 
... 
M30 

In a first step before the access on an external variable it is checked, weather the access generally is possible:

... 
N10 G90 Y0 
N20 $IF EXIST[V.E.POS_1] == TRUE 
N30 XV.E.POS_1 (Move X-axis on position POS_1) 
N40 $ELSE 
N50 #MSG ["V.E.POS_1 not available!"] (Create message and stop) 
N55 M0 
N60 $ENDIF 
... 
M30