Routing Messages From Data Highway Plus; Local Linkid; Routing Definitions - ProSoft Technology AN-X4-AB-DHRIO User Manual

30 AN-X4-AB-DHRIO (DH+)
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Routing Messages from Data Highway Plus

AN-X can route messages from Data Highway Plus either to devices on Ethernet/IP or over
Ethernet/IP to devices on another Data Highway Plus.
Routing is configured using a text file which contains:

a local link id definition

at least one routing definition
The AN-X distribution has technical notes with detailed examples of routing applications.

Local LinkID

The local LinkId is defined by a line with the keyword LocalLinkID followed by a number from
1 to 199
Example:
LocalLinkID 121
AN-X uses the Local Link ID is used to identify this particular Data Highway Plus network.
The Local Link ID must be unique for any path that Data Highway Plus messages from the AN-X
take and it must always exist in the router configuration file.
You use the Local Link ID when you build a return path in bridging applications.

Routing Definitions

Each routing definition consists of a link id and a path.
Link ID
The link ID is a number from 0 to 199, which identifies the route.
LinkID 0 is a special case; it defines a default route.
If a Data Highway Plus station sends a local message to the Data Highway Plus address of the
AN-X itself, the ANX uses the path defined with link ID 0 to route the message.
Multiple stations can send local messages to the AN-X. The AN-X sends the messages using the
default route and returns the replies to the appropriate sender. If no default route has been
defined, the AN-X returns an error.
A routing definition with Link ID 0 does not have to be included in the configuration.
Routing Path
The path consists of a series of keywords and parameters that route the message to the destination
Data Highway Plus network or destination device.
Nov 2022