Additional functions
14.1 Axis functions (AXNAME, AX, SPI, AXTOSPI, ISAXIS, AXSTRING, MODAXVAL)
Job planning
662 Programming Manual, 07/2010, 6FC5398-2BP40-0BA0
Significance
AXNAME
Converts an input string into axis identifiers; the input string must
contain a valid axis name.
AX
Variable axis identifier
SPI
Converts the spindle number into an axis identifier; the transfer
parameter must contain a valid spindle number.
n
Spindle number
AXTOSPI
Converts an axis identifier into an integer spindle index. AXTOSPI
corresponds to the reverse function to SPI.
X, Y, Z
Axis identifier of AXIS type as variable or constant
AXSTRING
The string is output with the associated spindle number.
ISAXIS
Checks whether the specified geometry axis exists.
MODAXVAL
For modulo rotary axes, determines the modulo position; this
corresponds to the modulo rest referred to the parameterized modulo
range (in the default setting, this is 0 to 360 degrees; the start and size
of the modulo range can be changed using MD30340
MODULO_RANGE_START and MD30330 $MA_MODULO_RANGE).
Note
SPI extensions
The axis function SPI(n) can also be used to read and write frame components. This means
that frames can be written e.g. with the syntax
$P_PFRAME[SPI(1),TR]=2.22.
An axis can be traversed by additionally programming axis positions using the address
AX[SPI(1)]=<axis position>. The prerequisite is that the spindle is either in the positioning or
axis mode.
Examples
Example 1: AXNAME, AX, ISAXIS
Program code Comments
OVRA[AXNAME("Transverse axis")]=10 ; Override for transverse axis
AX[AXNAME("Transverse axis")]=50.2 ; End position for transverse axis
OVRA[SPI(1)]=70 ; Override for spindle 1
AX[SPI(1)]=180 ; End position for spindle 1
IF ISAXIS(1) == FALSE GOTOF CONTINUE ; Abscissa available?
AX[$P_AXN1]=100 ; Move abscissa
CONTINUE:
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