Reference Manual
Table Of Contents
- Preface
- 1. Overview
- Untitled
- 2. Equipment
- 3. Installation
- 4. Basic Radio Programming and Setup
- 4.1. Define the Network Type and the Radio's Role in that Network
- 4.2. Establish Communication with Instrumentation and Computers
- 4.3. Establishing Communication with Other Radios in the Network
- 4.4. Set the Data Transmission Characteristics
- 4.5. Set Radio Passwords
- 4.6. Set the Hop Table Size in the Terminal Interface
- 4.7. Set the Radio to a Single Channel in a Terminal Emulator
- 4.8. Set the Radio to Hop Channels
- 4.9. Edit Frequencies for Multiple Channels
- 5. Configure Point-to-MultiPoint Networks
- 5.1. Point to MultiPoint Network Characteristics
- 5.2. Point-to-MultiPoint Network Quick Start (Terminal Interface)
- 5.3. Overlapping MultiPoint Networks
- 5.4. Establishing Communication with Other Radios in a MultiPoint Network
- 5.5. Routing Communication Through the Network
- 5.6. Setting Other MultiPoint Parameters
- 5.7. Reading Diagnostics in Tool Suite
- 6. Configure Point-to-Point Networks
- 7. View Radio Statistics
- 8. Release Notes
- 9. Additional Radio Information
- Appendix A: Technical Specifications
- Appendix B: RF Board Pin-Out
- Appendix C: RS232 Pin Assignments - DB9
- Appendix D: LRS455 Frequency Table
- Appendix E: Factory Default Settings
- Appendix F: Point-to-MultiPoint Operation LEDs
- Appendix G: Point-to-Point Operation LEDs
- Appendix H: FreeWave Legal Information
- Blank Page
- Blank Page
5. Configure Point-to-MultiPoint Networks
LUM0020CD Rev June-2020 Page 69 of 112 Copyright © 2019FreeWave
This document is subject to change without notice. This document is the property of FreeWave Technologies, Inc.
and contains proprietary information owned by FreeWave. This document cannot be reproduced in whole or in
part by any means without written permission from FreeWave Technologies, Inc.
Retry Odds
Setting Description
Description
While packets transmitted from the Master to the Slave radios in a MultiPoint
network are not acknowledged, packets transmitted from Slaves to the Master are
acknowledged.
It is possible that more than one Slave attempts to transmit to the Master at the
same time. Therefore, it is important that a protocol exists to resolve contention for
the Master between Slaves in the network.
This is addressed through the Max Slave Retry (on page 67) and Retry Odds
parameters.
l After the Slave has unsuccessfully attempted to transmit the packet the
number of times specified in the Max Slave Retry parameter, it attempts to
transmit to the Master on a random basis.
l The Retry Odds parameter determines the probability that the Slave attempts
to retransmit the packet to the Master; a low setting assigns low odds to the
Slave attempting to transmit.
l Conversely, a high setting assigns higher odds.
Example: Use two different Slave radios in a MultiPoint network, one
with a strong RF link and the other with a weak RF link to the Master.
If a Slave has a weak or poor link, set the Retry Odds parameter to 0
as it may become a chatty Slave and lockup the network, causing a
loss of communication.
l When the Retry Odds parameter is set to 0, after the Slave has exhausted the
number of retries set in the Max Slave Retry parameter and still not gained the
Master’s attention, the Slave’s data buffer is purged.
FREEWAVE Recommends: A Retry Odds parameter set to 0 is
recommended for most networks.
5.6.12. Slave / Repeater
Slave / Repeater
Setting Description
Default Setting (0) Disabled
Options
(0) Disabled
(1) Enabled
Setup Terminal
Menu
(5) MultiPoint Parameters > (A) Slave/Repeater
LRS455A-C, LRS455A-CE, LRS455-T
User-Reference Manual
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