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
9. Additional Radio Information
LUM0020CD Rev June-2020 Page 91 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.
When setting the radio to RS485:
1. Enable Modbus.
2. Set Master Packet Repeat to 3 in the radios that use RS485.
3. Set Turn Off Delay to 4.
The Turn Off Delay setting in the menu is used to control the length of time the transmitter driver
stays asserted after data transmission has finished.
l This is needed to allow the last transmitted character to reach the end of a long line and is
normally set to one character length of time.
l This setting also allows three complete reflections to the end of the line to ensure the ringing
on the line has fully dampened before releasing the bus to another device.
FREEWAVE Recommends: Shorter line lengths may use shorter delays, but four one-quarter-
character delay times are recommended.
Note: In Modbus, a Turn Off Delay setting of 0 causes internal timing errors.
Important!: There is no provision for hand shaking in any of the modes of operation.
Data rates above 9600 bps in RF Data Rate = 5 and above 19200 bps in RF Date Rate = 4 are NOT
recommended without a protocol that can handle error detection properly.
9.1.1. RS422 and RS485 Full Duplex Pinouts
Function Bare Board Pin Number DB-9 Pin Number
RX+ 7 3
RX- 9 7
TX+ 5 2
TX- 10 8
Signal Ground 4 or 6 5
9.1.2. RS485 Half Duplex Pinout
Function Bare Board Pin Number DB-9 Pin Number
Wire to both bins for Bus + Short 5 and 7 Short 2 and 3
Wire to both pins for Bus - Short 9 and 10 Short 7 and 8
Signal Ground 4 or 6 5
LRS455A-C, LRS455A-CE, LRS455-T
User-Reference Manual
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