Siemens SINUMERIK 840Di Function Manual page 1321

For a symmetrical search (see parameter "SearchDirection"), the search domain must only
include one magazine (cases 2 and 5 in the table above). If another search domain is
specified, the service will malfunction. A reference location must be specified in the
parameters MagNrRef and PlaceNrRef for a symmetrical search (see parameter
"SearchDirection"). The reference location is specified in the parameters MagNrRef and
PlaceNrRef. The reference location is a buffer location (a location from the magazine buffer,
i.e., change position, gripper, etc.) or a load point (a location from the internal loading
magazine). The search is executed symmetrically with reference to the magazine location in
front of the specified reference location. A multiple assignment to the magazine being
searched must be configured in the TPM block for the reference location. If this is not the
case, a malfunction occurs. If the magazine location in front of the reference location is
outside the search domain, the service responds as if it has not found a matching location.
Note
Before and after this PI service, the MMCSEM PI service must be called up with associated
WVar1 parameters for this PI service. See PI service MMCSEM for more information.
Parameter assignment
Signal
PIService
Unit
WVar1
WVar2
WVar3
WVar4
WVar5
WVar6
WVar7
PLC Basic Program Solution Line (P3 sl)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Type Value range
ANY PI.TSEARC
INT 1, 2
INT
INT
INT
INT
INT
INT
INT 1, 2, 3
Meaning
Complex search using search screen forms
TOA
MagNrFrom Magazine number of magazine from which
search must begin
PlaceNrFrom Location number of location in magazine
MagNrFrom, at which search must begin
MagNrTo Magazine number of magazine at which search
must end
PlaceNrTo Location number of location in magazine
MagNrTo, at which search must end
MagNrRef Magazine number of (internal) magazine, with
reference to which the symmetrical search is to be
performed. (this parameter is only relevant with a
"symmetrical" search direction)
PlaceNrRef Location number of location in magazine
MagNrRef, with reference to which the symmetrical search
is to be performed. This parameter is only relevant with a
"symmetrical" search direction
SearchDirection specifies the required search direction.
1: Forwards from the first location of the search domain
2: Backwards from the last location of the search domain
3: Symmetrical with real magazine location positioned in
front of the location specified by MagNrRef and PlaceNrRef
Detailed Description
2.12 Block descriptions
2-127