User Manual

Technical view
Technical text labels
6
CM110664en_07 119 | 351
Each element of the TD is called
ShortName . A ShortName is a designation for an individual plant element
within the automation station. A
ShortName is always linked to a description. This pair is called the
Name&Description_Pair .
TD rules
Item Rule
Address structure Comprises at least one hierarchical object and one function object
Has a variable length (site + 1..8 hierarchy and function objects + pin name)
Is independent of the automation station, that is, does not contain a designation
for an automation station
Must be unique for each site
Mnemonic Based on the English terms
Must not be translated
Plant elements on the same hierarchy level are distinguished through different
part names, e.g., HG01/HG02.
Syntax Site designation Consists of upper and lower case letters, and numbers (must start with a letter):
[a..z, A..Z, 0..9].
Is case insensitive, e.g.,
Imax and IMAx are treated the same.
Other partial designations Consist of upper and lower case letters ([A..Z] and [a..z]) and/or numbers 0 to 9.
Is case insensitive, e.g.,
Imax and IMAx are treated the same.
Max. number of characters Site: 10
Object: 9
Pin: 8
TD: 80
Separators Colon (:) after site name
Apostrophes (‘) for all other separations
Period (.) in front of pin name
Function blocks and pins
A function block, that is, an object with pins, can represent an area, a partial plant, a sub-area, an
aggregate, a section, or a component. Function blocks have attributes and function block pins have
attributes.
The following figure shows a function block and its pins as they appear in the program view:
Function block attributes
The main attributes of the function block are:
●
Name : Name of the function block based on the key of the TD. Example: ThOvrld
●
Description : Additional description. For generic operation it is shown as text in an operator unit.
Example: Thermoelectrical ovrld
●
Element type : Block in plant-engineering terms. Example: Component
●
Main value : Main value of the function block. It is set during engineering. Example: PrVal