Embedded Communications Systems RMX232 Guia do Utilizador

RMX232 Radio Modem User’s Guide N11391Embedded Communications Systems Specialists in Embedded RF Data Communications, Monitoring and Control Systems

Positioning the Radio Modem In order to achieve maximum operational reliability and range from your radio modems it is important to reduce the possib

problems. Inadequate performance from the bench test may require fine tuning of the configuration parameters. It is recommended that for any new site

Configuration Commands 3-1 Chapter 3 Configuration Commands This section describes the configuration and test commands supported by the radio modem.

Configuration Commands in Detail help Display basic help information This command is used to display brief help information. For detailed help inf

baud DTE baud rate This command sets the host interface (DTE) baud rate. The changed baud rate will take effect after leaving the configurator usin

Command format: unit [n] where: n = [0-15] The unit address that a modem pair must be set to in order for them to communicate. site Radio Modem si

addr Updates local memory unit, site and hop values This command sets the RAM based values for the unit address, site code and optionally the hop

dtr DTR Control This command interprets how the radio modem responds to the state of the DTR signal and changes to the DTR signal. If the host devi

dlytx Delay data packet transmissions This command is used to set the delay between the last serial character received by the radio modem and the

cmdchr Configuration escape character and guard time (user defined) This command allows the user to specify the ASCII value used for an escape seque

Copyright Notice Copyright ©2006 by Embedded Communications Systems Pty Ltd. All rights reserved. Under the copyright laws, this manual cannot be rep

remote Remote unit configuration This command is used to either enable or disable the unit for remote configuration access. Once enabled for remote

rptmode Repeater mode This command enables or disables repeater mode. Please refer to chapter 4 for a detailed overview of the radio modem in repeate

seropt DTE serial options This command enables the user to select from several serial protocol options. Command format: ping [s] where: s = 8n1 S

Modem Operation Explained 4-1 Chapter 4 Modem Operation Explained This section describes in detail the operation of a number of the radio modem’s co

The radio modem provides three kinds of serial port flow control: hardware (RTS/CTS), software (XON/XOFF) and none. XON/XOFF Flow Control (Software)

Radio Modem Addressing Scheme The RMX232 radio modem provides a two tier addressing scheme applied to each outgoing packet of data. Seven data bits a

On-Air Data Speed In a network of multiple radio modem point-to-point links, where network usage is at moderate levels, a situation occurs which resu

DTR Power Control The RMX232 radio modem has three states of operation in terms of power consumption. Maximum power consumption within the radio mode

A receiving modem, upon receipt of a connect request, will send a connect acknowledgement to complete the link establishment phase. Once the communic

number of attempts an ACK message is still not received the link connection is effectively terminated and the data packet is discarded. The default s

Contents Chapter 1 Introduction ...1-1 About this

Broadcast Multidrop This mode of operation is determined by the configuration command keyword ptpmode being set to OFF. Broadcast multidrop mode prov

Repeater Mode This mode of operation is determined by the configuration command keyword rptmode being set to ON or ALL. Repeater mode takes precedenc

A receiving radio modem will only accept a data packet whose hop count is zero. It is therefore essential that the correct hop count be specified in

Using the Radar function, a site test can be performed by placing one Radio Modem in a fixed position, then walking around the site with the second r

Connecting the Radio Modem 5-1 Chapter 5 Connecting the Radio Modem This section details the radio modem serial pin connections and describes variou

Connecting to a PC To connect the radio modem to a personal computer use the 9 way modem cables supplied. If the computer has a 25 way connector then

Two Wire Simplex Interface The radio modem can be used in a very basic two wire simplex connection. In this example, with no wake-up signal provided

Connecting to other DTE and DCE Equipment For DCE and DTE equipment that require DCD and DSR be connected for proper operation, the following interfa

Specifications 6-1 Chapter 6 Specifications General Radio Approvals Australian Standards AS4268.2 European Standards EN 300 220-3 & EN 301 489

Current Drain at 9V Transmit/Receive Average 40mA TBD for RMX232-151P & RMX232-433P Standby 15mA 400uA In power down state Radio

Chapter 5 Connecting the Radio Modem...5-1 Serial Pinouts...

Product Version Information 7-1 Chapter 7 Product Version Information Version Information The RMX232 products contain both a hardware and firmware v

Modification History 8-1 Chapter 8 Modification History Bug Fixes & Change History Version 2.00a First release of the RMX232 Radio Modem. The R

User’s Guide

User’s Guide

Introduction 1-1 Chapter 1 Introduction About this Manual This manual has been written for the RMX232 range of low cost short range modems license e

Point-to-Multipoint Configuration and Broadcast Multi-drop Configuration Point-to-Multipoint Radio Link Master Unit c:\ RMX232RS232 RMX232 RS232 RMX

Installation 2-1 Chapter 2 Installation and Operation This chapter describes basic connection procedures and operation. It also covers the front pan

The Radio Modem is fitted with a DC power socket for use with an external regulated 7-15VDC power source. The diagram below shows the power socket po

The status LED indicator on the front of the radio modem should be showing 1 short pulse every 2 seconds (approximately). This indicates the radio mo