HEIDENHAIN TNC 620 (81760x-02) ISO programming - Manual (Page 526)

Test run and program run
16.5 Program run
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TNC 620 | User's ManualDIN/ISO Programming | 2/2015
The TNC skips all touch probe cycles in a mid-
program startup. Result parameters that are written
to from these cycles might therefore remain empty.
You may not use mid-program startup if the following
occurs after a tool change in the machining program:
The program is started in an FK sequence
The stretch filter is activated
Pallet management is used
The program is started in a threading cycle
(Cycles G84, G85, G206, G207 and G209) or the
subsequent program block
The touch-probe cycle G55 is used before
program start
Go to the first block of the current program to start a block scan:
Enter
GOTO "0"
Select mid-program startup: Press the MID-
PROGRAM STARTUP soft key
Start-up at N: Enter the block number N at which
the block scan should end
Program: Enter the name of the program
containing block N
Repetitions: If block N is located in a program
section repeat or in a subprogram that is to be run
repeatedly, enter the number of repetitions to be
calculated in the block scan
Start mid-program startup: Press the machine
START button
Contour approach (see following section)
Entering a program with the GOTO key
If you use the GOTO block number key for going into
a program, neither the TNC nor the PLC will execute
any functions that ensure a safe start.
If you use the GOTO block number key for going into
a subprogram,
the TNC will skip the end of the subprogram
((
G98 L0))
the TNC will reset function M126 (Shorter-path
traverse of rotary axes)
In such cases you must always use the mid-program
startup function.