Siemens SINUMERIK 840Di Function Manual page 1358

Detailed Description
2.12 Block descriptions
2.12.15 FC 8: TM_TRANS transfer block for tool management
Description of functions
In the case of changed tool positions or status changes, the user will call FC TM_TRANS.
This FC is parameterized with parameter "TaskIdent":
1. For loading/unloading positions
2. For spindle change positions
3. For revolver change positions as transfer identifier
4. Asynchronous transfer
5. Asynchronous transfer with location reservation
The interface number is indicated in parameter "TaskIdentNo".
Example for loading point 5:
Parameter "TaskIdent":= 1 and "TaskIdentNo":= 5.
Furthermore, the current tool positions and status data (list of "Status" parameter in the
following text) are also transmitted for this transfer function.
Note
FC8 informs the NCK of the current positions of the old tool.
The NCK knows where the old and the new tool have been located until the position change.
In the case of a transfer without a so-called "old tool" (e.g., on loading), the value 0 is
assigned to parameters "OldToolMag", "OldToolLoc".
Block FC TM_TRANS may be started (with "Start" parameter = "TRUE") only if an activation
signal for the appropriate interface (DB 71, DB 72, DB 73 in word 0) for this transfer has
been supplied by the tool management function.
Output parameter "Ready" is set to the value TRUE when the job has been executed
correctly.
The user must then set the
"Start" parameter to FALSE
or not call the block again.
If the
"Ready" parameter = FALSE,
the error code in the "Error" parameter must be interpreted
(see Call example FC 8 and timing diagram).
If the error code = 0, then this job must be repeated in the next PLC cycle (e.g., "Start"
remains set to "TRUE"). This means that the transfer operation has not yet been completed.
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PLC Basic Program Solution Line (P3 sl)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0