Summary of Contents for FF-Automation WSN169
- Page 1 WSN SERIES RADIO MODEMS SETUP, INSTALLATION & OPERATING MANUAL Rev. G – 4 March 2007 WSN Manual Page 1 of 34...
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Page 2: Table Of Contents
CONTENTS INTRODUCTION ..................3 PRODUCTS COVERED ....................3 IMPORTANT NOTICES ..................... 3 PRODUCT OVERVIEW ................4 GENERAL .......................... 4 TRANSMITTER ........................4 RECEIVER ......................... 4 MPU CONTROL ......................... 5 PROGRAMMING & CONFIGURATION ................5 SOFT MODEM: ........................5 MODES OF OPERATION ....................5 HANDSHAKING ......................... -
Page 3: Introduction
IMPORTANT NOTICES 1.2.1 Copyright All rights to this manual are the sole property of FF-Automation Oy The copying of the manual in whole or in part by any method without written permission is strictly prohibited. 1.2.2 Right To Change In the interest of improvement, R.F. -
Page 4: Product Overview
PRODUCT OVERVIEW GENERAL The WSN Series has been designed as a range of high specification, low cost radio modems for stand-alone applications or for integration into OEM products. Through the use of advanced DSP technology, the design has been optimised for reliability and low current consumption, making the WSN suitable for operation on remote sites without mains power. -
Page 5: Mpu Control
MPU CONTROL The Microprocessor (MPU) is the heart of the product and at the centre is a 128k flash microprocessor that controls all the interface circuits to the radio module and external input/outputs. As well as the control function, the processor provides DSP functionality that enables modem operation between 150 and 9,600bps. -
Page 6: Forward Error Correction
glance the status of the product and the serial data port. 2.9.2 Time-out Timer The transmitter within the WSN has a user programmable time-out timer which allows the maximum continuous transmission time to be set in order to prevent channel blocking due to a fault. -
Page 7: Specifications
SPECIFICATIONS TECHNICAL SPECIFICATIONS 3.1.1 General Frequency Range: WSN169/170 138 - 175MHz WSN225 175 - 225MHz WSN450/470 406 - 512MHz WSN869 869 - 870MHz (50MHz – 950MHz to special order) Power Requirements: 12VDC (10V – 15.5DC) Standby: <75uA Receiver on & decoding: <70mA... - Page 8 20MHz without re-alignment Spurious Response: WSN 169/450/869 >65dB WSN 170/225/470 >70dB Blocking: WSN 169/450/869 >85dBuV WSN 170/225/470 >90dBuV Intermodulation: WSN 169/450/869 >60dB (3 Signal) WSN 170/225/470 >65dB (3 Signal) Adjacent Channel: >65dB at 12.5kHz IF Frequencies: 45MHz and 455kHz Spurious Emissions: WSN 169/450/869 <ETS 300-220 WSN 170/225/470...
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Page 9: Approvals And Licensing
3.2.3 European Declaration of Conformance Hereby, FF-Automation Oy declares that the WSN Series of Radio Modems is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC. In the interest of improvement the above specifications are subject to change without notice. -
Page 10: Pre-Programmed Channel Plans
PRE-PROGRAMMED CHANNEL PLANS Using the PC configuration software, the WSN can be programmed with a number of standard channel plans. These currently include all UK MPT1411 or MPT1329 channels. Further standard channel plans may become available in later releases of the configuration software. A mixture of channels from different channel plans can also be entered discretely using the software. - Page 11 458.05625 463.55625 458.06875 463.56875 458.08125 463.58125 458.09375 463.59375 458.10625 463.60625 458.11875 463.61875 458.13125 463.63125 458.14375 463.64375 458.15625 463.65625 458.16875 463.66875 458.18125 463.68125 458.19375 463.69375 458.20625 463.70625 458.21875 463.71875 458.23125 463.73125 458.24375 463.74375 458.25625 463.75625 458.26875 463.76875 458.28125 463.78125 458.29375 463.79375 458.30625 463.80625 458.31875...
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Page 12: Uk Mpt1329 Channels
UK MPT1329 CHANNELS The WSN can be programmed to operate on the full MPT1329 band of channels with access to channels 26, 27 & 32 denied, in line with MPT1329 band plan. The radio should be programmed for a maximum power level of 500mW. CHANNEL FREQUENCY 458.5000 Guard Ch. -
Page 13: Setup & Interfacing
SETUP & INTERFACING INTERNAL CONSTRUCTION The exploded view shows the main components of the radio modem. There are no user adjustments or settings, which require removal of the covers. INTERFACE PORT PIN CONNECTIONS The WSN Series is equipped with a 9 way female D connector for the traffic interface. The pins of this connector are allocated as follows:- 5.2.1 RS232-Only (Full Handshaking) and 5V TTL versions... - Page 14 5.2.2 RS232/RS422/RS485 Versions The RS232/RS422/RS485 versions of the WSN may be software programmed to have either an RS232 or an RS422/RS485 compatible interface. To allow programming without an interface adapter, a radio programmed for RS422/RS485 operation will switch back to RS232 operation if the front panel rotary switches are set to position 00 to select programming mode.
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Page 15: 12Vdc Power
+/-1dB. There are no internal power adjustment points inside the modem. There are two transmit power ranges available. The low power WSN169, WSN450 & WSN869 versions can be set between 10mW and 750mW, while the higher power WSN170, WSN225 &... -
Page 16: Internal Modem
in resettable mode the timer restarts each time a transmission is made, in cumulative mode the timer counts up during transmit, and down during receive. If the timer counts up to the lockout time during transmit, lockout occurs; this will eventually happen if the radio spends more than half of its time transmitting. -
Page 17: Forward Error Corrector
5.11 FORWARD ERROR CORRECTOR At 9600bps there is also a programmable option to switch in a forward error corrector. When switched on, the over-air data format changes to a fixed format using 14 bit words. These comprise 8 data bits, 5 CRC (Cyclic Redundancy Check) bits and a flag bit which is used to differentiate control and data functions in messages. - Page 18 Transmission Without Hardware Handshaking (RS232-Only and TTL Versions):- If RTS/CTS handshaking is disabled the radio will start transmission as soon as data is received at the serial port, transmission ceases as soon as the serial buffer has been emptied and a period equivalent to two characters at the radio signal baud rate has elapsed.
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Page 19: Traffic Protocol & Routing Modes
5.14 TRAFFIC PROTOCOL & ROUTING MODES 5.14.1 Transparent Mode In this mode, the radio has no knowledge of the data it is transmitting, data is simply transmitted and received under hardware control with the option of RTS control or initiation of transmit after receiving serial data, with CTS providing an optional flow control. -
Page 20: Transmit & Receive Timing
5.15 TRANSMIT & RECEIVE TIMING The WSN only operates in a simplex or semi-duplex mode. In simplex mode the receive and transmit frequencies are the same, whereas in the semi-duplex mode they are different. In either mode data is only sent in one direction at a time as the radios do not have separate synthesisers for transmit and receive. - Page 21 5.15.1 Receive To Transmit Switching Time When using the internal modem the action that initiates transmission can be either receipt of a character at the serial port or the operation of RTS. These examples use the first mode. The radio does nothing until the stop bit of the first character for transmission has been received, the transmitter is then started: The time delay between receipt of the stop bit for the first character to be transmitted at the transmitting radio and output of the start bit of that character at the receiving radio is the sum of...
- Page 22 5.15.2 Message Duration The time taken to transmit a message can be simply derived by multiplying the number of characters in a message by the values given in table C making any appropriate corrections for data format. The exception is 9600 baud where extra synchronisation sent during the message must be taken into account, 8 synchronisation bits lasting a total of 0.833ms are sent after every eighth message character.
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Page 23: Power Consumption
5.16 POWER CONSUMPTION The WSN is a very low power product and is ideal for operation from batteries with solar power backup. The information below is intended to help the user decide on the best battery and solar cell size for operation at non-powered sites. 5.16.1 Transmitter RF power verses current TX Power 500mW 200mW 100mW 50mW... -
Page 24: Status Leds
5.19 STATUS LEDS The WSN has a number of LEDs to enable the operator to see at a glance the status of the product and the serial port:- RF Carrier Detect/Busy Transmit System Receive Data Transmit Data 5.19.1 System LED With the Exception of the System LED the remainder are self-explanatory. -
Page 25: Store & Forward
STORE & FORWARD STORE & FORWARD BASED ON CLIENT PROTOCOL. To conserve valuable air time and avoid the possibility of collisions due to coverage overlaps with other repeaters transmitting at the same time, only messages that require forwarding by specific repeaters are re-transmitted when the WSN is used in “Store & Forward” mode. Stripping out the addresses of incoming serial messages, comparing the address with the list of outstation addresses stored in the unit and routing the messages accordingly achieve this. - Page 26 If a radio is specified as a relay in a link, any locally connected Modbus devices will not be aware of communications that take place as no activity occurs on the serial port in this state. This may cause problems however if more than one master exists in a system as a radio that is being used as a link in a relay is not available to transmit messages.
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Page 27: Rft Routing Protocol
6.2.5 Timeouts in MODBUS Modes When a transmission from a master station radio is made in Modbus mode the radio will calculate a timeout for a reply, this calculation is based on many configuration parameters including the radio baud rate, lead in delay, host inactivity time, maximum message length, power save timing etc. - Page 28 The position of the address in the protocol field is specified using the “ADDRESS OFFSET” parameter in the setup programme. A setting of 0 specifies zero offset, i.e. the address is the first byte in the message, an offset of 6 specifies the 7th message byte and so on. 16 bit addressing or more is not supported as a maximum of only 256 destinations can be supported by the routing table.
- Page 29 6.3.3 Serial Port Handshaking With RFT Routing When RFT ROUTING mode is enabled the RS232 port lines DTR and DSR, can be used to assist in power saving. The RTS and CTS lines are optionally used according to the “RTS/CTS HANDSHAKE”...
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Page 30: Installation
INSTALLATION INTRODUCTION Correct installation of the WSN radios should ensure reliable data communications for many years. The most important installation points to remember are:- Suitable antenna system mounted at the correct height & polarisation to achieve the required distance. Reliable power supply capable of supplying the correct voltage and current. Correct installation for the environment. -
Page 31: Antennas, Coax Feeders & Peripherals
ANTENNAS, COAX FEEDERS & PERIPHERALS 7.4.1 Antennas Apart from the radio modem, the antenna is probably the most important part of the system. The wrong choice or a bad installation will almost certainly impede the product’s performance. Depending on the application either an omni-directional or directional antenna will be required. 7.4.2 Types of Antennas We can offer a complete range of antennas to suit all applications;... -
Page 32: Antenna Mounting
7.4.6 Antenna Mounting Location: The antenna should be mounted in a clear area, as far away as possible from obstructions such as metal constructions, buildings and foliage. Height: The WSN operates in the UHF band, which requires near line of sight communication. -
Page 33: Mounting & Installation
7.4.11 Coax & Connectors: 50 Ohm coax connectors of a good quality should be used, termination must be in accordance with the manufacturer's specification, any special tools required to terminate the connectors must be used. Connectors exposed to the environment should be sealed to prevent the ingress of moisture. - Page 34 FF-Automation Oy Eräkuja 2, 01600 Vantaa, FINLAND, http://www.ff-automation.com, email: info@ff-automation.com Tel: +358 10 2190 500 Rev. G – 4 March 2007 WSN Manual Page 34 of 34...
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