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ELPRO 805U-D User Manual

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User Manual
805U-D Radio Modem
ELPRO, 9/12 Billabong Street, Stafford Q 4053, Australia.
Tel: +61 7 33528600 Fax: +61 7 33528677
Email:
sales@elprotech.com
Web: www.elprotech.com
ELPRO 24 hour Support Help-line America (866) 7134409 Rest of the
world +617 3352 8624
Thank you for your selection of the 805U radio modem. We trust it will give
you many years of valuable service.
Page 2
© May 2013

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  • Page 1 Email: sales@elprotech.com Web: www.elprotech.com ELPRO 24 hour Support Help-line America (866) 7134409 Rest of the world +617 3352 8624 Thank you for your selection of the 805U radio modem. We trust it will give you many years of valuable service.
  • Page 2 Contents ATTENTION! Incorrect termination of supply wires may cause internal damage and will void warranty. To ensure your 805U enjoys a long life, double check ALL your connections with the user’s manual before turning the power on. Man_805U Rev 1.10 Page 3...
  • Page 3 805U Radio Modem Module User Manual WARNING In some countries, a radio licence is not required for the 805U telemetry modules provided the module is installed using the antenna and equipment configuration prescribed. Where a radio licence is not required, operation is authorised by the relevant Authority in your country on a non-protection basis.

  • Page 4: Table Of Contents

    Contents How to Use This Manual To receive the maximum benefit from your 805U product, please read the Introduction, Installation and Operation chapters of this manual thoroughly before putting the 805U to work. Chapter Four Configuration details the configurations available and explains the diverse operation of the product in detail.
  • Page 5 805U Radio Modem Module User Manual 3.5 T ..................20 RANSPARENT EPEATERS 3.6 C ......................22 ONTROLLED 3.6.1 Auto-Connect Controlled Mode ................. 24 3.6.2 Low Power Auto-Connect Mode ................24 3.6.3 Single-Connect Controlled Mode ................24 3.6.4 Fast Operation Controlled Mode Not used............. 25 3.6.5 CTS/RTS Flow Control ....................

  • Page 6: Chapter 1 Introduction

    Chapter One Introduction Chapter 1 INTRODUCTION General The 805U radio modem module has been designed to provide flexible and reliable radio modem functions, at an economical price. Radio modems transmit serial data over a long distance via radio. The serial data is not changed - the output data is the same as the input data.

  • Page 7: Transparent Mode

    805U Radio Modem Module User Manual and ends when there are no more data bytes in the input buffer, or when the number of bytes transmitted equals the maximum message length (user configurable - default 530 bytes). If more than 530 bytes is input, the 805U unit will transmit the first 530 bytes, then the next 530 bytes, and so on until all of the data has been transmitted.

  • Page 8: Controlled Mode

    Chapter One Introduction 805U 805U RS485 805U Controlled Mode “Controlled mode” provides “point-to- HOST point” communications similar to telephone HOST modems. In controlled mode, the flow of NO DATA data is controlled by the 805U units. Each DATA 805U 805U unit is configured with an address by 805U the user, and a destination address for the 805U...

  • Page 9: Repeater Units

    805U Radio Modem Module User Manual Repeater Units A 805U unit may be used as a repeater to re-transmit radio messages. The purpose of a repeater unit is to extend radio range. In transparent mode, there can be an unlimited number of repeaters, however with some conditions (refer to Section 3.5).

  • Page 10: Chapter 2 Installation

    Chapter Two Installation Chapter 2 INSTALLATION General The 805U module is housed in an rugged aluminium case, suitable for DIN-rail mounting. Terminals will accept wires up to 2.5 sqmm in size. Normal 110-240V mains supply should not be connected to any terminal of the 805U module.

  • Page 11: 3Db/6Db Collinear Antenna

    805U Radio Modem Module User Manual An antenna should be connected to the module via 50 ohm coaxial cable (eg RG58, Cellfoil or RG213) terminated with a male SMA connector. The higher the antenna is mounted, the greater the transmission range will be, however as the length of coaxial cable increases so do cable losses.

  • Page 12: Yagi Antennas

    Chapter Two Installation 1m minimum COLINEAR ANTENNA WEATHERPROOF CONNECTORS WITH “3M 23” TAPE SURGE ARRESTOR (OPTIONAL) COAXIAL CABLE STRESS RELIEF LOOP MAST 805U PROVIDE GOOD GROUND CONNECTION TO MAST, MODULE AND SURGE ARRESTOR INSTALL AERIAL ABOVE EARTH STAKE IF GROUND CONDITIONS ARE LOCAL OBSTRUCTIONS POOR, INSTALL MORE THAN ONE STAKE...

  • Page 13: Power Supply

    805U Radio Modem Module User Manual may be installed with the elements in a vertical plane (vertically polarized) or in a horizontal plane (horizontally polarized). For a two station installation, with both modules using Yagi antennas, horizontal polarization is recommended. If there are more than two stations transmitting to a common station, then the Yagi antennas should have vertical polarization, and the common (or “central”...

  • Page 14: Db9 Connector Pinout

    Chapter Two Installation 2.4.2 DB9 Connector Pinout Name Direction Function Data carrier detect – - driven when link is established in controlled mode - driven always in transparent mode Transmit Data – Serial Data Output Receive Data – Serial Data Input Data Terminal Ready - DTR can be configured to initiate low power mode, or to force a link disconnection (“hang up”...
  • Page 15 805U Radio Modem Module User Manual HOST 805U HOST RS485 CONNECTIONS HOST HOST 805U 120  RS485 CONNECTION USING TERMINATING RESISTOR Page 16 © May 2013...

  • Page 16: Chapter 3 Operation

    Chapter Three Operation Chapter 3 OPERATION Power-up and Normal Operation When power is initially connected to the 805U module, the module will perform internal diagnostics to check its functions. The following table details the status of the indicating LEDs on the front panel under normal operating conditions. LED Indicator Condition Meaning...

  • Page 17: Character Type

    805U Radio Modem Module User Manual When the 805U unit detects data in the input buffer, it initiates a radio message. The radio message will end when the number of transmitted bytes reaches the maximum message length (configurable by the user), or if the input buffer becomes empty. If the configured serial data rate is the same or more than the radio data rate, then data is transmitted as soon as it enters the input buffer - data “streams”...

  • Page 18: Addressing

    Chapter Three Operation At 19200 and 38400 bits/sec, the 805U adds forward error correction in the transmitted data. This is added automatically and is different to the configurable CRC error-check.. The radio range at 19200 baud is better than 38400 or 76800. The expected range at 38400 is 60% of maximum and at 76800 is 30%.

  • Page 19: Transparent Mode

    805U Radio Modem Module User Manual A 805U can also be configured with a “unit” address - this gives the module a unique identification. The unit address feature is not used in transparent mode, but it is used in controlled mode. Transparent Mode In transparent mode, radio messages are transmitted without unit addressing.
  • Page 20 Chapter Three Operation If a transparent mode repeater receives a message on its second group address, it will re- transmit the message on its first group address, but it will not output the data on its serial port. Here is an example : Group Address Module A, B and C are First...

  • Page 21: Controlled Mode

    805U Radio Modem Module User Manual Controlled Mode In controlled mode, data is only transferred between two modules (that is, a point to point link). One of the modules is configured as a “master” unit and the other as a “slave” unit. There can also be up to five intermediate repeaters in the link.
  • Page 22 Chapter Three Operation During normal operation, if there has been no radio activity for a period (called the “link check” period), the “master” unit will transmit the “connect” message to check the radio path. The link check period is a time configured by the user. Successful Communications Source Module Destination Module...

  • Page 23: Auto-Connect Controlled Mode

    805U Radio Modem Module User Manual The time taken to transmit a message is :- |------------HEADER-------------|--------------------DATA-----------|-----------| lead-in system unit repeater dest. zero data error check 10msec address addr addrs's addr byte No. of bytes 0 - 5 1 no. of data bytes The time for each byte is 0.5msec @19200 bits/sec.

  • Page 24: Fast Operation Controlled Mode Not Used

    Chapter Three Operation module does not respond, then the link is not established and no data can be transferred. The module will not attempt to reconnect again until it receives another connect command from its host. The link is normally disconnected by the host issuing a disconnect command. In this mode, it is normal for a host to connect and disconnect to several slave modules using AT commands.

  • Page 25: What Operating Mode To Use

    805U Radio Modem Module User Manual Repeater Communications Successful Unit A Unit B Unit C Unit D Source Repeater Repeater Destination   ---> Transmit Receive message message  Re-transmit  ---> Receive message message  Re-transmit  ---> Receive message message ...

  • Page 26: Serial / Radio Rates

    Chapter Three Operation message without an error-check, it will treat the last two data bytes as the error check - the error- check will always be incorrect and no data will be output. Error-check is strongly recommended for controlled mode operation. If error-check is not configured, then a 805U unit will transmit an acknowledgment message (ACK) whenever it receives a radio message, without checking for errors.
  • Page 27 805U Radio Modem Module User Manual not affect the performance of the system. If interference is causing a problem, try to improve the normal radio level by mounting the antennas higher or in a better location. This not always possible. System performance may be improved by changing the following parameters :- ...

  • Page 28: Chapter 4 Configuration

    Chapter Four Configuration Chapter 4 CONFIGURATION Before Configuring onfiguration comprises selecting parameter values for the operation of the 805U unit. Four pre-set configurations may be achieved using the four DIP switches. These configurations cover most applications - refer section 4.7. Before you start configuration, parameter settings must be decided.

  • Page 29: Default Configuration

    805U Radio Modem Module User Manual In transparent mode, a group address also needs to be configured. The group address is also a 8 bit value (values 0 to 255). This is not required in controlled mode. In controlled mode, each module is also configured with a unit address between 0 and 127 - there can be up to 128 modules in the one controlled mode system.

  • Page 30: Transparent Mode

    Chapter Four Configuration Reading and Configuring a module You will need a connection cable between the PC and the 805U. The cable should have straight-through connections as per section 2.4.1 of this manual. If your PC only has USB serial connections with no RS232 port, you will need to purchase a USB to RS232 converter cable.

  • Page 31: Controlled Mode

    805U Radio Modem Module User Manual Transparent Repeater When you select a transparent repeater, the program will ask you to enter a second group address. The repeater will re-transmit messages from the first group to the second group - and from the second group to the first group.
  • Page 32 Chapter Four Configuration At the master unit, you need to enter the address of the slave. Select the “Stored Add” page and “Dest1”. The address of the slave is entered into “Dest Add 1” and up to five repeater addresses may be entered.

  • Page 33: Other Parameters

    805U Radio Modem Module User Manual no ACK, then the master will reset the link (DCD reset). If you enter an “Inactivity Timeout” value, then the 805U will automatically reset the link if there has been no data transmissions within this time. If you use the link check feature, you should enter an “Inactivity Timeout”...
  • Page 34 Chapter Four Configuration  After each message is transmitted, a 805U unit will not transmit another message during the transmit delay time. This could be used to allow a reply message to be received before the next message is sent. ...
  • Page 35 805U Radio Modem Module User Manual DTR Control  The DTR signal on the RS232 port can be used for different functions in controlled mode:  “Ignore DTR” - the DTR signal does not perform any function  “Command Mode” - if the host resets DTR, the 805U will go into command mode - when DTR is activated, the module will revert to on-line mode...

  • Page 36: Hayes Commands

    Chapter Four Configuration Hayes Commands The 805U unit may be configured by a host device using Hayes AT commands. Configuration may be done “off-line” by a user (with a PC terminal as the host device) or it can be done automatically “on-line”...
  • Page 37 805U Radio Modem Module User Manual AT&U Unit Address Range 0-127. Default 1. This is also the second group address for transparent repeaters. Configuration of Data Rates and Character Type Radio Baud Rate The radio rate must be the same in all modules 19,200 baud (default) 76,800 baud 38,400 baud...
  • Page 38 Chapter Four Configuration destination address saved in AT&Z0 (this is the slave unit). The destination address needs to be entered - for example, AT&Z0=24 will store a destination address of 24 AT&Z0=33,34,35,5 will store an address sequence, where 5 is the destination address and 33, 34 and 35 are repeater addresses.
  • Page 39 805U Radio Modem Module User Manual repeaters 2 and 3. Up to 5 repeater addresses may be used. A repeater can already be connected to another module - it can still act as a repeater for another link. Once a connection is made (DCD set), any data sent will be acknowledged by the other module.
  • Page 40 Chapter Four Configuration Configuration of Error Checking Error-checking is normally disabled for transparent mode, and normally enabled for controlled mode. The configurations for transparent and controlled modes above follows this convention. However you are able to override this. AT&E CRC Error Checking &E0 Disable CRC Error Checking (default) &E1...

  • Page 41: Configuration Examples

    805U Radio Modem Module User Manual Configuration Examples Transparent Mode Extending a PLC Network RS485 RS485 9.6KB 9.6KB 805U 805U 805U RS485 19.2KB 19.2KB 38.4KB REPEATER DATA = 7 DATA BITS, 1 START, 2 STOP, EVEN PARITY Left-hand Unit Configuration Set the module to factory default settings: AT&F Set the system address to a random number:...
  • Page 42 Chapter Four Configuration Set the serial data rate to 9600 ATC4 Set the radio data rate to 19200 not necessary (default) Set the character type to 7,1,2,even AT&B13 Set the operating mode to Transparent Repeater AT&M1&L1 Exit and save the configuration AT&W Right-hand Unit Configuration Set the system address to the same random number:...

  • Page 43: Switch Configuration

    805U Radio Modem Module User Manual Module #2 Set the module to factory default settings: AT&F Set the system address to the same random number: AT&S217 Set the unit address to 2 AT&U2 Set the operating mode to controlled mode AT&M2&L3 Note that this module can be configured as any controlled mode, except for fast operation.
  • Page 44 Chapter Four Configuration Note that these switch settings do not set the system or group addressing - this still needs to be set by Hayes Commands or the configuration program. The four switches are located on the top end-plate, as per this diagram. If you look at the end of the module with the front of the module up, then Switch 1 is the left-most switch, and “on”...

  • Page 45: Chapter 5 Specifications

    805U Radio Modem Module User Manual Chapter 5 SPECIFICATIONS General EMC specification EN 300 683 89/336/EEC 869.4 – 869.65 MHz, 500mW Radio specification EN-300-220/1 Housing 110 x 185 x 30mm Powder-coated, extruded aluminium DIN rail mount Terminal blocks Removable Suitable for 2.5sqmm conductors LED indication OK operation, Serial RX and TX, Radio RX and...
  • Page 46 Chapter Five Specifications RS485 Port 2 pin terminal block Typical distance 1.2 km Data rate (bit/sec) - 1200, 2400, 4800, 9600, configurable 14400, 19200, 38400, 57600, 76800, 115200 Byte format 7 or 8 data bits Stop/start/parity bits configurable System Parameters Operating modes Transparent mode Broadcast system...

  • Page 47: Chapter 6 Troubleshooting

    805U Radio Modem Module User Manual Chapter 6 TROUBLESHOOTING Diagnostics Chart INDICATOR CONDITION MEANING  Power supply failure OK LED OFF Continuously  CPU failure  Normal Operation OK LED ON Continuously  Radio transmitting Radio TX LED ON Flashes briefly ...
  • Page 48 Chapter Six Troubleshooting &T2 Transmit & Receive BER Test. Used with a second module configured as a transparent repeater. &T3 RSSI Measurement. Monitors the received signal strength, and displays in dBm. Most radio tests are carried out using the AT&T2 test as this is the easiest to accomplish. AT&T3 - Received Signal Strength Display This option provides for testing the radio path between two 805U units.

  • Page 49: Bit Error Rate Test (Ber)

    805U Radio Modem Module User Manual 6.2.2 Bit Error Rate Test (BER) BER may be tested in one direction by typing AT&T0 (BER master) at the sending unit and typing AT&T1 (BER slave) at the receiving unit. The sending unit will repeatedly send pseudo-random frames, and the receiving unit will check these frames for errors.

  • Page 50: Chapter 7 Warranty & Service

    ELPRO is not liable for damages, losses, costs, injury or harm incurred as a consequence of any representations, warranties or conditions made by ELPRO or its representatives or by any other party, except as expressed solely in this document.
  • Page 51 805U Radio Modem Module User Manual Appendix A Hayes Commands The following details all of the Hayes commands supported by the 805U. Default settings are shown by a “dot”,  Command Function Answer Incoming Connection message in controlled mode – the module can also be set to answer incoming connections immediately or after a certain number of attempts (see S-Register S0) - the default for S0 is 1, meaning that the module will normally automatically answer on the first connection attempt.

  • Page 52: Appendix Ahayes Commands

    Appendix A Hayes Commands ATSn=xx Set value of S-Register n to xx Verbal/Numeric Response Codes Numeric response codes Verbose response codes V1 Extended Response Codes. Allows more detailed response codes, including connection speed. Basic response codes only X0 X0 + Connection Baud rate codes (CONNECT 19200, CONNECT 38400) X1 + BUSY Message X2 + RINGING Message Reset the module, and re-load the configuration stored in non-volatile memory.
  • Page 53 805U Radio Modem Module User Manual Set module’s Group Address Range 0-255. Default 0. AT&G AT&K Flow Control Configuration. &K0 Flow Control Disabled. CTS Always high. Module ignores RTS. &K1 not used &K2 not used &K3 CTS/RTS Flow Control. CTS Reflects the state of the local buffer. Module only transmits serial data when RTS is high.
  • Page 54 Appendix A Hayes Commands &T0 Transmit Bit Error Rate Test. Generates pseudo random data and sends out radio. &T1 Receive Bit Error Rate Test. Receives data from &T0 module, and records BER statistics. &T2 Transmit & Receive BER Test. Used with a second module configured as a transparent repeater.
  • Page 55 805U Radio Modem Module User Manual 0-255 Link Check Timer Units Seconds. 0 disables. How frequently to send a “Link Check” message. Usually set less than the timeout set by the AT\T command. Default 0. 1-255 Number of Connection How many times to attempt a connection attempts after an ATD command.
  • Page 56 Appendix A Hayes Commands SB is serial baud Rate, (in bits per second) SR is serial data Rate, (in bytes per second – usually 1/10 of SB) RB is radio baud Rate, (in bits per second) TD is transmit delay (0.008) MP is the maximum packet size to be transferred NB is the maximum number of bit times delay allowed between characters in the protocol.

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