Siemens SINUMERIK 840D sl Function Manual page 961

Symmetrical search
To ensure that a symmetrical search can be carried out relative to a tool location, the following
prerequisites must be met:
● The search range must encompass only one magazine: "WVar1" (from: magazine number)
== "WVar3" (to: magazine number)
● Specification of a reference location, i.e. a tool location around which the symmetrical
search will take place: "WVar5" (number of the reference magazine) and "WVar6" (number
of the reference location)
● For the reference location, a multiple assignment to the magazine to be searched must
have been configured in the TPM block.
● "WVar7" (search direction) = 3
The reference location is a buffer storage location, i.e. a tool location from the magazine buffer
storage, e.g. swapping station, grippers, etc., or a loading station/location, i.e. a tool location
from the internal loading magazine. The symmetrical search takes place with regard to the tool
location, which is upstream of the reference location.
If the tool location is upstream of the reference location outside of the search range, the PI
service will respond as if no suitable location had been found.
Note
Before and after this PI service, the MMCSEM PI service must be called up with the associated
parameter WVar1 for this PI service. See Chapter "PI service: MMCSEM (Page 950)".
Description of formal parameters
Signal
PIService:
Unit:
WVar1:
WVar2:
WVar3:
WVar4:
WVar5:
WVar6:
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Type Value range
ANY "PI".TSEARC
INT 1, 2, 3 ... 10
INT
INT
INT
INT
INT
INT
P3: Basic PLC program for SINUMERIK 840D sl
Description
Complex search using search screen forms
TOA
From:Magazine number
From: Location number
to: Magazine number
to: Location number
Number of the reference magazine
(only relevant for symmetrical search:
Search direction ==3)
Number of the reference location
(only relevant for symmetrical search:
Search direction ==3)
13.17 Block descriptions
961