Siemens S7-1200 Manual page 22

4 Configuration/Engineering
AssemblyID and Connection Point IDs
They are called the Assembly instances, AssemblyIDs, or pointIdentifier. The EDS
file contains them in a somewhat cryptic way in the [Connection Manager] section.
In the below shown figure the with "Path" commented line (line 202) is of particular
interest as it contains the access path to the assembly objects.
Figure 4-9 [Connection Manager] section AssemblyIDs
The access path is a series of hexadecimal numbers, which follows a specified
format.
This series is split into segments which are in the order of:
1. Class Segment (ID: 20hex) addressing the Assembly class (ClassID = 04hex)
2. Instance Segment (ID 24hex or 25hex) addressing the Configuration Assembly
(0307hex = 775dec)
3. Connection Point Segment (ID 2Chex or 2Dhex) addressing a Connection
Point (300hex = 768dec)
4. Connection Point Segment (ID 2Chex or 2Dhex) addressing a Connection
Point (301hex = 769dec)
The order of the connection points is also predefined and is always in the same
order. First the OT direction (Originator to Target), which is, from the point of view
of the Scanner, the Output direction.
Followed by the TO direction (Target to Originator), which is the Input direction for
the Scanner.
EtherNet/IP Scanner
Entry-ID: 109782314, V1.1.0, 04/2021
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