HEIDENHAIN ITNC 530 User Manual page 601

If you are working with nested programs, you can use
MP7680 to define whether the block scan is to begin at
block 0 of the main program or at block 0 of the last
interrupted program.
If the working plane is tilted, you can use the 3-D ON/OFF
soft key to define whether the TNC is to return to the
contour in a tilted or in a non-tilted coordinate system.
If you want to use the block scan feature in a pallet table,
select the program in which a mid-program startup is to be
performed from the pallet table by using the arrow keys.
Then press the RESTORE POS AT N soft key.
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.
If you execute mid-program startup in a program
containing M128, the TNC performs compensating
movements as necessary. The compensating movements
are superposed over the approach movement.
To go to the first block of the current program to start a block scan,
enter GOTO "0".
To select block scan, press the BLOCK SCAN soft key,
or
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, enter the number of repetitions to be
calculated in the block scan.
To start the block scan, press the machine START
button.
Contour approach (see following section)
HEIDENHAIN iTNC 530 601