User guide

DATA-LINC GROUP

PN 161-09889-001B

rev 3/2005 ver 6.33c

PLR580D / DA User Guide

(4) DTR Connect.

For PLR580 use the user should not change this parameter.

The repeater’s hopping pattern must also be set in a multipoint network; this is accomplished with parameter (5)

Repeater Frequency. Setting this parameter is in contrast with point-to-point mode where the repeater automatically

uses the master’s hopping pattern. The repeater may be programmed to either use the master’s hopping pattern

selection (0) or its own selection (1).

(6) NetWork ID allows multipoint networks to be established without the use of the Call Book. If the NetWork ID is set to

any value lower than the default (255), the remotes in the multipoint network will communicate with the first multipoint

master or repeater heard with the same NetWork ID. When the NetWork ID is used, multipoint masters and repeaters

may be replaced without reprogramming all of the remotes in the network. In addition, this allows a remote to establish

communications with different masters (though not at the same time) without having the call book numbers in the Call

Book. This is very useful in mobile multipoint applications.

(8) Remote/Repeater The remote/repeater mode allows a PLR580 The Overall Rcv Rate measures the percentage of

data packets that were successfully transmitted from the Master to the Remote on the first attempt without requiring

retransmission. A number of 75 or higher indicates a robust link that will provide very good performance even at high

data transmission rates. A number of 25 or lower indicates a weak or marginal link that will provide lower data

throughput.

in a multipoint system to simultaneously act as a remote and a repeater. When in this mode, a radio will repeat

transmit any packets sent from a master as well as send them out the RS232 port. This allows a PLR580 set as a

slave/repeater to act as a remote at the same time. 0 disables this mode, 1 enables it.

(9) SubNet ID

The PLR580 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:

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 repeater as its link should have the Rcv SubNet ID set to the Xmit SubNet ID of

that repeater