Siemens SINUMERIK 840 Planning Manual page 35

2 Description of Functions
2.2.2 Loading
target location is occupied, disabled or reserved, the procedure is aborted and a fault message
issued.
Via the TO memory management, a free D number for each cutting edge of the tool is
searched for and stored in the reference list. The geometrical data are entered in the TO area.
In addition, P memories P 8 and P 9 (additional compensation) are defined for every block in a
transformation rule.
The source data for data transformation are taken from the adapter lists (data blocks of the
magazine table). If no adapter lists are available, the contents of the dynamic buffer (DW 70 to
DW 75) are entered in P 8 and P 9 of the relevant tool offset memory. Since the entry of data
in P 8 and P 9 is currently not supported by the computer link or code carrier, P 8 and P 9
have the value 0 if no adapter list is available.
During entry of the magazine data in the magazine table, the "replacement tool" and "location
occupied " bits are set in the identification DB = DB 152.
Reloading
For reloading, the ID and duplo numbers must be stored in the magazine table. The
"reloading" function is initiated by loading locator number 0 and command code 0. The
magazine is now searched for a tool that is assigned the same ID number and duplo number
as the tool whose data are stored in the dynamic buffer.
Loading with operator guidance via operator panel
The operator panel provides operator guidance during loading. The interface between operator
and tool management is established through DB 146, which is created during startup. Up to
software version 5, the following machine data are stored temporarily in data words DW 136 to
DW 138:
DB 146 DW 136
DW 137
DW 138
Magazine number of loading/unloading point
The number of the magazine containing the loading point is specified in this machine data.
With loading with operator guidance, the search for an empty location starts in this magazine.
If no empty location is found in this magazine, the search for an empty location is continued in
the chained magazines.
Offset loading point 1/2
The difference between actual position and loading point 1/2 is specified in this machine data.
Loading with operator guidance
If the user wishes to be prompted during loading, i.e. no locator number is specified, the
corresponding machine data must be set depending on the loading package used (computer
link m +11, bit 6; code carrier m +11, bit 5; tape m+11, bit 4 where m=7000 for PLC 1,
etc.).
2–22
Magazine number of loading/unloading point
Offset loading point 1
Offset loading point 2
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SINUMERIK 840/880 (PJ)