See User's Manual - HEIDENHAIN CNC PILOT 640 User Manual

Changed functions in software 688945-05 54843x-05
Start blck search is not available during Reference machining,
which is required for load monitoring (option),

see User's Manual

The input range for tool parameters DX, DY, DZ and DS was
expanded to four decimal places for millimeters (mm) and five
decimal places for inches (inch), see User's Manual
The Pocket type (PTYP/T column) and the PLC settings (PTYP/M
column) are displayed in the magazine list.
The input range for cycle parameter Overlap factor U was
expanded to 0.99 for milling cycles.
In order to prevent unwanted loss of data, the default setting
was changed to Pocket table: No
16
for a Parameter restore.
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
Fundamentals | Software and features