Siemens SINUMERIK 840D sl Function Manual page 1001

Block FC TM_TRANS may be started only with "Start" parameter = "TRUE" if an activation
signal for the appropriate interface (DB71, DB72, DB73 in word 0) for this transfer has been
supplied by the tool management function.
When this job is executed correctly, the output parameter "Ready" contains the value TRUE.
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 FC8 and pulse 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.
If the user assigns a value of less than 100 to the "Status" parameter, then the associated
interface in data block DB71 or DB72 or DB73, word 0 is deactivated (process completed).
The appropriate bit for the interface is set to 0 by FC8.
The "Start" parameter does not need a signal edge for a subsequent job. This means that new
parameters can be assigned with "Start = TRUE" immediately when "Ready = TRUE" is
received.
Asynchronous transfer
To ensure that changes in the position of a tool are automatically signaled from PLC to the
tool management (e.g. power failure during an active command or independent changes in
the position by the PLC), FC8 is called with "TaskIdent" = 4 or 5. This call does not require
interface activation by tool management.
If parameter "TaskIdent" = 5, the tool management reserves the location in addition to changing
the position. The location is only reserved if the tool has been transported from a real magazine
to a buffer storage.
A relevant NC channel must be parameterized in the "TaskIdentNo" parameter.
The previous location of the tool is specified in the parameters "OldToolMag" and "OldToolLoc".
The current location of the tool is specified in the parameters "NewToolMag", "NewToolLoc".
"Status" = 1 must be specified.
With "Status" = 5, the specified tool remains at location "OldToolMag", "OldToolLoc". This
location must be a buffer (e.g. spindle). The real magazine and location must be specified in
the parameters "NewToolMag", "NewToolLoc"; the location is at the position of the buffer. This
procedure must always be used if the tool management is to be informed of the position of a
specific magazine location. This procedure is used for alignment in search strategies.
General conditions
● A cancellation of a transfer, e.g. by a channel reset, is not permitted.
● Parameter "Start" = 1, until parameter "Ready" == 1 or "Error" == 1
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
P3: Basic PLC program for SINUMERIK 840D sl
13.17 Block descriptions
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