HEIDENHAIN TNC 640, User Manual, Page: 402 / 948

Programming Q Parameters | Additional functions
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
FN 18: SYSREAD – Reading system data
With the
FN 18: SYSREAD
function you can read system data and
store them in Q parameters. The selection of the system datum
occurs via a group number (ID no.), a system data number, and, if
necessary, an index.
The read values of the function
FN 18: SYSREAD
are
always output by the control in metric units regardless
of the NC program’s unit of measure.
The following is a complete list of the
FN 18: SYSREAD
function. Please be aware that not all
functions are available depending on the model of your
control.
Group
name Gruppen-
nummerID Systemdaten-
nummer Index Description
Program information
3 - Number of the active machining cycle
6 - Number of the most recently executed touch
probe cycle
–
1 = None
7 - Type of calling NC program:
–
1 = None
0 = Visible NC program
1 = Cycle/macro, main program is visible
2 = Cycle/macro, there is no visible main
program
103 Q parameter
number Relevant within NC cycles; for inquiry as to
whether the Q parameter given under IDX
was explicitly stated in the associated CYCLE
DEF.
110 QS parameter
number Is there a file with the name QS(IDX)?
0 = No, 1 = Yes
This function eliminates relative file paths.
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111 QS parameter
number Is there a directory with the name QS(IDX)?
0 = no, 1 = Yes
Only absolute directory paths are possible.