User guide

PlantLinc PLR5000 User’s Guide

P/N 161-09888-001 DATA-LINC Group

SubNet ID

The PLR5000 series modems offer a SubNet ID system for use in multipoint networks using Network ID.

This feature allows the users to dictate what path a given Repeater or remote will use to achieve a link to the

network Master. For example, if a Remote modem in a given network has line of sight to the network Master

and one or more Repeaters, but only one Repeater is close to that remote, SubNet ID can be used to link that

Master with the proper Repeater only.

Note: This feature can only be used in networks using Network ID with one or more Repeaters.

There are two components to SubNet ID. The first is the Xmit (transmit) SubNet ID, and the second is Rcv

(receive) SubNet ID. The Xmit SubNet ID is used only by Repeaters and is the ID that a Repeater sends out

when sending data to other Repeaters or Remotes. The Rcv SubNet ID is the ID that Repeaters or Remotes

look for to receive data.

Note: The Master is not affected by these settings. Only Repeaters and Remotes use these settings. Remotes

only use Rcv SubNet ID

Modem configurations are as follows (see Diagram 1 below):

Master No setting used

Repeaters Any Repeater that should be linked directly to the Master should have the Rcv SubNet ID

set to 0. Any Repeater using another Repeater as its link, needs the Rcv SubNet ID set to

the Xmit SubNet ID of that Repeater. The Xmit SubNet ID can be set to anything from 1

to E.

Remotes Any remote that should be linked directly to the Master should have the Rcv SubNet ID

set to 0. Any remote using a Repeateras its link should have the Rcv SubNet ID set to the

Xmit SubNet ID of that Repeater

Diagram 1: Modem configurations