December 2001 Hard-Disk Organization 7 – 39
7.4 Hard-Disk Organization
7.4.1 Partitions
The hard disk of the TNC is divided into three partitions:
TNC partition User-specific data such as NC programs, tool tables, datum tables, and pallet
tables.
PLC partition Your OEM-specific data such as system files, PLC programs, machine
parameters, help files, PLC dialogs, PLC error tables, compensation value
tables and OEM cycles. The PLC partition is visible only after you have entered
the code number 807667.
As a machine tool builder, you are concerned primarily with the PLC partition.
SYS partition System-specific files such as system files, NC dialogs, HEIDENHAIN cycles,
etc. The SYS partition is not visible and cannot be selected.
Size of the
partitions
As of NC software 280 476-06, hard disks with more than 3.25 GB are
supported. In a hard disk with 3.25 GB the partitions are divided as follows:
If the hard disk has more than 3.25 GB, the SYS partition receives the rest, up
to a maximum of 2 GB. If there is still space available, it is used for the PLC
partition up to a maximum of 2 GB. The rest is used by the TNC partition.
Warning
Alterations in the system partition can impair proper function of the TNC!
Partition Content Size
TNC User data 2 GB
PLC OEM data 128 MB
SYS System data 1.125 GB
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