Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 640)

L-force | PLC Designer
General Editors
638 DMS 4.1 EN 03/2011 TD29

Switch point (H-function)
Function H
The switch functionality or H-function in DIN66025 enables the programmer to
operate binary path-dependent switches. Basically always first the number of the
switch must be specified ("H"), then the switch position must be defined,
either absolutely by using the word "L" or relatively by using the word
"O".
Allowed syntax
[G-command] H O/L
Parameters of
the command
H Number of the H-function
O Relative position in the object [0..1]
0: Start
1: End
IL L> 0: Distance to the start point
L< 0: Distance to the end point
H-numbers
If the H-number is positive, the corresponding H-function is switched on, otherwise it
is switched off. H-numbers must not be 0 and have to lie in the range from -32767 to
32767.
The H-numbers 1-32 are logged in the interpolator. The output dwSwitches of the
function block SMC_Interpolator is a bit mask. Bit number i indicates whether the H-
function (i +1) is currently set or not. H-numbers greater than 32 are not logged.
The interpolator outputs with iLastSwitch the last switched H-number. iLastSwitch is
positive, when the H-function was switched on, and otherwise it is negative.