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Summary of Contents for ELPRO 805U
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Page 1: User Manual
User Manual 805U Radio Modem ELPRO Technologies Pty Ltd, 9/12 Billabong Street, Stafford Q 4053, Australia. Tel: +61 7 33524533 Fax: +61 7 33524577 Email: sales@elprotech.com Web: www.elprotech.com... -
Page 2: Man_805U Rev 1.8
Contents Thank you for your selection of the 805U radio modem. We trust it will give you many years of valuable service. 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... -
Page 3: Warning
The foldout sheet 805U Installation Guide is an installation drawing appropriate for most applications. 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. -
Page 4: Table Of Contents
Contents CONTENTS WARNING ..........................4 CHAPTER ONE INTRODUCTION ................. 7 ........................7 ENERAL ...................... 8 RANSPARENT ....................... 9 ONTROLLED ......................10 EPEATER NITS CHAPTER TWO INSTALLATION ..............11 ........................11 ENERAL ....................11 NTENNA NSTALLATION 2.2.1 3dB/6dB Collinear antenna.................. 12 2.2.2 Yagi antennas....................... - Page 5 805U Radio Modem Module User Manual CHAPTER FOUR CONFIGURATION................29 ....................29 EFORE ONFIGURING ......................... 29 DDRESSING .................... 30 EFAULT ONFIGURATION ..................30 ONFIGURATION ROGRAM 4.4.1 Transparent Mode ....................31 4.4.2 Controlled Mode ....................32 4.4.3 Other Parameters....................34 ...................... 37...
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Page 6: Chapter One Introduction
Examples of host devices are PLC’s, data loggers, intelligent transducers and computers. The 805U unit can receive data from the host device and transmit this data by radio to another (or several) 805U module. The other module will recreate the serial data and output it as either a RS232 or RS485 serial signal. -
Page 7: Transparent Mode
(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
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 data to be transmitted to. -
Page 9: Repeater Units
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 Two Installation
1.5 km. Where it is not possible to achieve reliable communications between two 805U modules, then a third 805U module may be used to receive the message and re-transmit it. This module is referred to as a repeater. An antenna must be connected to each 805U module using the female SMA connector at the top of the module. -
Page 11: 3Db/6Db Collinear Antenna
“3M 23 tape”, with a final layer of PVC insulating tape. Where antennas are mounted on elevated masts, the masts should be effectively earthed to avoid lightning surges. Although the 805U module is fitted with surge protection, additional surge suppression devices are recommended if lightning surge problems are experienced. If the antenna is not already shielded from lightning strike by an adjacent earthed structure, a lightning rod may be installed above the antenna to provide shielding. -
Page 12: Yagi Antennas
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 EARTH STAKE INSTALL AERIAL ABOVE IF GROUND CONDITIONS ARE LOCAL OBSTRUCTIONS POOR, INSTALL MORE THAN ONE STAKE 2.2.2 Yagi antennas. -
Page 13: Power Supply
Power Supply The 805U module is powered by a 10 - 30VDC or 13 – 24VAC supply, minmum 9 Watt capacity. For DC supplies, the negative side of the 805U supply is connected to "COM"... -
Page 14: Rs485 Serial Port
MALE 2.4.2 RS485 Serial Port The RS485 port provides for communication between the 805U unit and its host device using a multi-drop cable. Up to 32 devices may be connected in each multi-drop network. Note that the RS485 port is shared internally with the RS232 port - make sure that the RS232 port is disconnected before using the RS485 port. - Page 15 805U Radio Modem Module User Manual HOST 805U HOST RS485 CONNECTIONS HOST HOST 805U 120Ω RS485 CONNECTION USING TERMINATING RESISTOR Page 16 © November 2004...
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Page 16: Chapter Three Operation
- only one serial port can be used at any one time. The radio communications is half-duplex - this means that the 805U operates at half duplex. Many applications use full duplex RS232 communications but do not require full duplex - the protocol used operates at half-duplex and will operate with the 805U without problems. -
Page 17: Character Type
The maximum size of the data packet is configurable by the user (maximum is 530 bytes). If less data than the maximum size is input to the 805U, then the 805U will transmit the actual data input. If more data is input than the maximum size, then the 805U will transmit multiple packets until all of the data is transmitted. -
Page 18: Radio Data Rate
A system address is superimposed on each message to provide discrimination between different 805U systems on the same radio channel. Each 805U unit in the same system must be configured with the same system address - refer Section 4, Configuration. Although other 805U modules may hear the radio transmissions, because they have a different system address, the radio transmission is ignored and no serial data is output. -
Page 19: Transparent Mode
The group address is not used in controlled mode. 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. - Page 20 Operation transmitted message will now have the second group address. Only 805U modules configured with the second group address will accept the re-transmitted message. 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.
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Page 21: Controlled Mode
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. Each 805U unit is configured with a unit address - only the unit with an address matching the destination address of the radio message will process the message and output the serial data. - Page 22 Chapter Three Operation If the source unit does not receive an ACK message, it will re-transmit the same message. It will attempt to transmit the message up to five times. If the unit still does not receive an ACK message after five attempts, it will reset the DCD LED, and reset the DCD output. During normal operation, if there has been no radio activity for a period (called the “link check”...
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Page 23: Auto-Connect Controlled Mode
- power consumption is reduced to approx 30% of normal. The low power condition will occur if the 805U is configured for auto-connect mode AND if the low power mode feature is configured. The DTR signal on the RS232 port will control switching between low power and normal operation. -
Page 24: Fast Operation Controlled Mode Not Used
ACK, it will transmit the same message again. The 805U will transmit the message up to five times. If it does not receive an ACK after the 5 attempt, it will assume communications failure and reset its DCD status. The unsuccessful message will not be re-transmitted and will be lost. -
Page 25: What Operating Mode To Use
It is possible to configure different units in the same system with different operating modes, however the system will not operate. A 805U unit configured in one mode will not process a message received from a unit in the alternate mode. -
Page 26: Serial / Radio Rates
Interference will only cause a problem if the amplitude of the interference is comparable to the radio signal from the 805U units. If the interference level is relatively small, then it will not affect the performance of the system. If interference is causing a problem, try to improve Man_805U Rev 1.8... - Page 27 805U Radio Modem Module User Manual 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 :- • If in transparent mode, try controlled mode.
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Page 28: Chapter Four Configuration
• Addressing - system address, group address, unit address. • Character type. You need to find out the character type of the host devices connected to the 805U units. The most common character type is 8 data bits, no parity, 1 start bit and 1 stop bit. -
Page 29: D Efault C Onfiguration
Default Configuration The default configuration of the 805U is transparent mode, no error check, no CTS/RTS flow control, serial rate 9600, radio rate 19200, character type 8/n/1. The system address will be set in the factory according to the module serial number. -
Page 30: Transparent Mode
Specifications 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 Five Specifications 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.
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Page 33: Other Parameters
Packet Size (bytes) This selects the maximum number of bytes which will be transmitted in one message. If more than this number of bytes is input into the 805U, then the module will transmit more than one message. The default value is 530 bytes which is the largest packet value. If you are operating in a... - Page 34 “Flow control” affects the use of the CTS and RTS signals on the RS232 port. These signals can be used to prevent overflow of the input buffer or output buffer of the 805U. The settings should be selected to match the host device. The options for this setting are : ! “None”...
- Page 35 Note that the link is always connected in transparent mode. ! “Always On” - the 805U sets the DCD to be always on ! “Only High When Connected” - the DCD signal will be on when the link is connected and off when the link is reset ! “Pulse Low on Disconnect”...
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Page 36: Hayes Commands
ASCII messages designed for use with conventional telephone modems. Before a 805U unit will accept Hayes commands, it must be in “command” mode. A host device may force the unit to command mode by sending a sequence of three “escape”... - 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...
- Page 38 33, 34 and 35 are repeater addresses. The first repeater will be 33. The 805U master will attempt to connect to the destination address (slave). If the module cannot connect, or if communications fails, the module will continually send “connect”...
- Page 39 805U Radio Modem Module User Manual via 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.
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Page 40: Configuration Program
Chapter Five Specifications 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: C Onfiguration E Xamples
Note that the repeater will only output data to its PLC for messages received from the first 805U. It will not output data from the right-hand PLC. If you set both group addresses to 1, then the repeater will output data from both sides - this is only possible when there is only one repeater. - Page 42 Chapter Five Specifications 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:...
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Page 43: S Witch C Onfiguration
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... - Page 44 Chapter Five Specifications 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”...
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Page 45: Chapter Five Specifications
805U Radio Modem Module User Manual Chapter Five SPECIFICATIONS General EMC specification EN 300 683 89/336/EEC Radio specification EN-300-220/1 869.4 – 869.65 MHz, 500mW Housing 110 x 185 x 30mm Powder-coated, extruded aluminium DIN rail mount Terminal blocks Removable Suitable for 2.5sqmm conductors... -
Page 46: Configuration
Chapter Five Specifications Serial Ports RS232 Port DB9 female DCE RTS/CTS/DTR/DCD hardware signals provided 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... -
Page 47: Chapter Six Troubleshooting
Test Functions 6.2.1 Radio Testing - AT&Tx To aid in the checking and setup of the 805U unit, diagnostic functions are provided using the standard Hayes AT commands. To perform the tests, you will need a terminal (PC + hyper- terminal) set-up to match the module (same character type and serial speed). - Page 48 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. Although a pair of units may communicate successfully, radio communication may be affected by a range of influences, including atmospheric conditions, changing landscape, degradation of antennas or co-axial cable, low battery voltage etc.
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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 Seven 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: Appendix A Hayes Commands
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... - Page 52 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 AT&G Set module’s Group Address Range 0-255. Default 0. 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 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. S19 is calculated as S19 = 1000 * (NB/SB) (Rounded up)
- Page 57 Contact us for any additional information on these or any other product ranges, or place an order Tel: ++27 21 762 8995 Fax: ++27 21 762 8996 Fax2email: ++2786 660 0510 Postal address: P.O Box 24110, Lansdowne, Cape Town, 7779 Street address: 47 Flamingo Crescent, Lansdowne, Cape Town, 7780 info@tabateq.com...
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