LRS400S Data Transceiver Manual FreeWave Technologies LRS400S Data Transceiver Version 1.0 FreeWave Technologies, Inc. 1880 South Flatiron Court Boulder, CO 80301 (303) 444-9200 (303) 786-9948 Fax www.FreeWave.com LUM0025AA Rev A Version 1.
LRS400S Data Transceiver Users Manual LICENSED BAND WIRELESS DATA TRANSCEIVER USER MANUAL Copyright © 1995-2010 by FreeWave Technologies, Inc. All rights reserved. Published 2010. WARRANTY FreeWave Technologies warrants your FreeWave® Wireless Data Transceiver against defects in materials and manufacturing for a period of two years from the date of shipment. In the event of a Product failure due to materials or workmanship, FreeWave will, at its option, repair or replace the Product.
LRS400S Data Transceiver Users Manual CAUTION: The LRS400S series transceiver have maximum transmitted output power of 2W. It is recommended that the transmit antenna be kept at least 71 cm away from nearby persons to satisfy FCC RF exposure requirements. LUM0025AA Rev A Version 1.
LRS400S Data Transceiver Users Manual Table of Contents ABOUT FREEWAVE TRANSCEIVERS.................................................................................................................6 CHOOSING A LOCATION FOR THE TRANSCEIVERS....................................................................................6 CHOOSING POINT-TO-POINT OR POINT-TO-MULTIPOINT OPERATION ........................................................................7 QUICK START ON A POINT-TO-MULTIPOINT NETWORK ...........
LRS400S Data Transceiver Users Manual RS-485 Half Duplex Pin-Outs..............................................................................................................................30 RS232 PIN ASSIGNMENTS ........................................................................................................................................30 RF BOARD PINOUT ............................................................................................................................................
LRS400S Data Transceiver Users Manual About FreeWave Transceivers FreeWave transceivers operate in virtually any environment where RS232 data communications occur. A pair of transceivers function as a 9-pin null modem cable. If the FreeWave transceivers are to be used in an application where a null modem cable is used, such as communication between two computers, then the FreeWave transceivers can be connected directly.
LRS400S Data Transceiver Users Manual Choosing Point-to-Point or Point-to-MultiPoint Operation A Point-to-Point network is limited to one Master and one Slave transceiver. In a Point-to-MultiPoint network (also referred to as MultiPoint network) the transceiver, designated as a Master, is able to simultaneously communicate with numerous Slaves.
LRS400S Data Transceiver Users Manual Quick Start on a Point-to-MultiPoint Network The following is a quick start guide for setting up two transceivers in Point-to-MultiPoint mode. This mode allows for a Master to communicate with several Slaves simultaneously. 1. Connect the transceiver to the serial port of a computer either through a serial cable or via the diagnostics cable. Make sure to connect the radio to a power source (typically, 6 to 30 VDC). 2. Open up a HyperTerminal session.
LRS400S Data Transceiver Users Manual Quick Start on a Point-to-Point Network When purchased as a pair, the FreeWave® Wireless Data Transceivers are shipped from the factory preconfigured to operate in Point-to-Point applications. To establish communications between a pair of FreeWave Wireless Data Transceivers just received from the factory: 1. Connect antennas to the transceivers. Freewave Technologies recommends that the antenna port be loaded at all times to prevent damage to the LRS400S radios.
LRS400S Data Transceiver Users Manual Setting up a Transceiver Operation Mode The Operation Mode option designates the method FreeWave transceivers use to communicate with each other. FreeWave transceivers operate in a Master to Slave configuration. Before the transceivers can operate together, they must be set up to properly communicate. In a Point-to-Point configuration, Master or Slave Mode may be used on either end of the communication link without performance degradation.
LRS400S Data Transceiver Users Manual Slave (3) communicate with its Master. Point-to-Point Repeater (5) FreeWave allows the use of one repeater in a Point-to-Point communications link, significantly extending the operating range. When designated as a Repeater, a transceiver behaves as a pass-through link. All settings for the call book, baud rates and radio transmission characteristics are disabled. A Repeater will connect with any Master that calls it.
LRS400S Data Transceiver Users Manual Baud Rate This setting is the communication rate between the transceiver and the instrument to which it is connected. It is important to note that this is independent of the baud rate for the other transceiver(s) in the network. For example, a pair of transceivers may be used in an application to send data from remote process instrumentation to an engineer's computer.
LRS400S Data Transceiver Users Manual Baud Rate Description Actual Baud Rate (selections 0-9) The actual baud rate for the transceiver’s data port. Data, Parity There are six data word length and parity configurations available to be used with FreeWave transceivers. The default setting is 0 (8, N, 1) and is the most commonly used serial communications protocol. Select the appropriate option to communicate with the end device.
LRS400S Data Transceiver Users Manual Both Ports The terminal may be connected to either port. Setup mode is invoked by sending a "U" (capital) to the Diagnostics port or by pressing/toggling the Set-up button/switch, if available. OEM boards may also enter Setup when Pin 2 is grounded. The Main Data Port is the RS232 port. The OEM modules use a 2-row, 2 mm female connector. The diagnostic cable for this port (ASC2009DC) is available from FreeWave.
LRS400S Data Transceiver Users Manual Call Book The Call Book is required to be used in Point-to-Point networks. The instructions provided in this section are for Point-to-Point mode only. Using the Call Book offers both security and flexibility in determining how FreeWave transceivers communicate with each other. Three settings must be made for two FreeWave transceivers to communicate in Point-to-Point mode: 1.
LRS400S Data Transceiver Users Manual Radio Transmission Characteristics The Edit Radio Transmission Characteristics option allows the user to modify several different parameters in the transceiver. Many of these parameters must be maintained throughout the network for proper functionality. Note: This menu is only for the sophisticated user who has a good understanding of the principles of radio data transmission.
LRS400S Data Transceiver Users Manual (1) AND (2) MAX PACKET SIZE AND MIN PACKET SIZE The Max and Min Packet Size settings and the RF Data Rate determine the number of bytes in the packets. Throughput can be enhanced when packet sizes are optimized. The following 3 tables provide the information to determine optimum setting values.
LRS400S Data Transceiver Users Manual (3) XMIT RATE FreeWave transceivers utilize a Master Transmit Beacon to provide low current consumption in the slave radios. The slave radios will turn their receiver off when no data is being passed. The Xmit Rate setting allows the duty cycle of the Master Transmit Beacon to be changed. A setting of 0 is the highest duty cycle and a setting of 9 is the lowest duty cycle. (4) RF DATA RATE FreeWave transceivers have five settings for the RF Data Rate (1, 2, 3, 4, 5 ).
LRS400S Data Transceiver Users Manual (6) SLAVE SECURITY Slave security is a feature which allows Slave transceivers to accept transmissions from a Master not included in the Call Book. The default setting is 0 (Slave Security enabled) which means, only Masters in the Slaves’ Call Book may link to that Slave. Slave Security may be disabled (setting of 1) allowing any Master to call the Slave. Slave Security has no effect in Point-to-MultiPoint networks where the Network ID is not set to 255.
LRS400S Data Transceiver Users Manual On the other hand, the function in the Master is effectively the same. With a setting of 255, the Master will allow a Slave to stay connected as long as 1 packet in 255 is successfully received at the Master. The Retry Time Out parameter is useful when a MultiPoint network has a roving Master or Slave(s). As the link gets weaker, a lower setting will allow a poor link to break in search of a stronger one.
LRS400S Data Transceiver Users Manual (C) REMOTE LED This setting enables the user to connect Remote LED’s through the diagnostics port. Setting Description Notes 0 Board LED’s Default. Only on board LEDs are enabled. 1 Board and Remote LED’s Onboard LED’s are enabled as well as Remote LED’s through the Diagnostic port. On board LED’s are disabled. Remote LED’s are enabled through the Diagnostic port. Note: When using Remote LED’s the center (TX) LED will not turn Green when in Setup mode.
LRS400S Data Transceiver Users Manual MultiPoint Parameters When installing MultiPoint networks it is important to do some up front planning. Unlike Point-to-Point networks, a Point-to-MultiPoint network requires several parameters are set consistently on all transceivers in the network. This includes RF data rate and Min and Max Packet Size. Note: If several independent MultiPoint networks are to be located in close proximity the planning becomes more critical.
LRS400S Data Transceiver Users Manual (2) MAX SLAVE RETRY The Max Slave Retry setting defines how many times (0 to 9) the Slave will attempt to retransmit a packet to the Master before beginning to use a back-off algorithm (defined by the Retry Odds setting). Slave retries will stop when an acknowledgement is received from the Master. (3) RETRY ODDS While packets transmitted from the Master to the Slaves in a MultiPoint network are not acknowledged, packets transmitted from Slaves to the Master are.
LRS400S Data Transceiver Users Manual the DTR line of the Master will provide a 1 PPS pulse on the CD line of any Slave in the network. To use the 1 PPS Enable/Delay feature the steps outlined below must be followed: 1PPS Enable/Delay Setup: 1. The 1 PPS Enable/Delay parameter must be set to 0 in the Master. 2. The Master must have a 1 PPS pulse on the DTR pin. 3. The 1 PPS Enable/Delay parameter on the Slaves must be enabled. Slaves are calibrated at the factory.
LRS400S Data Transceiver Users Manual 2. Xmit Subnet ID. This setting identifies the ID on which this device transmits, and in turn which devices will listen to it. The Xmit Subnet ID parameter is relevant for MultiPoint Repeaters only. The default (disable) setting for both Rcv and Xmit is F. Notes: A Master will always transmit and receive on 0. Changing these settings on the Master is not recommended, under normal circumstances.
LRS400S Data Transceiver Users Manual Radio Information Radio Statistics in the Main Menu allows the user to view data transmission statistics gathered by the transceiver during the most recent session. This is valuable when the user needs to know the signal strength and noise levels of the link. Statistics are gathered during each data link and are reset when the next link begins. See display below.
LRS400S Data Transceiver Users Manual table. The individual measurement values at each frequency hop channel are shown in the frequency table. Pressing the Enter key when the Radio Statistics menu is displayed, accesses the frequency table. Ideally, noise levels should be below -120 dBm units and the difference between the average signal level and average noise level should be 26 dB or more.
LRS400S Data Transceiver Users Manual Factory Default Settings FreeWave 415MHz transceivers are shipped from the factory with the following Default Settings: Operation Mode Default MultiPoint Parameters Point to Point Slave 1 (1) MASTER PACKET REPEAT 0 Set Baud Rate Default (2) MAX SLAVE RETRY Baud Rate 19200 (3) RETRY ODDS 0 (A) Data Parity 0 (4) DTR CONNECT 0 (B) Modbus RTU 0 (6) NETWORK ID 255 (C) RS232/485 0 (7) RESERVED (D) Setup Port 3 (8) MULTI MASTER SYNC 0 (E) TurnOffD
LRS400S Data Transceiver Users Manual Additional Transceiver information This section contains additional important information about FreeWave transceivers. The following topics are included in this section: Operational RS422 and RS-485 Information RS232 Pin Assignments OEM Board Pin Assignments Operational RS-422 and RS-485 Information For both RS-422 and RS-485, the FreeWave transceiver can drive 32 standard unit loads and loads the bus with only 1/8 unit load.
LRS400S Data Transceiver Users Manual RS-422 AND RS-485 FULL DUPLEX PIN-OUTS Function RX+ RXTX+ TXSignal Ground Bare Board Pin Number 7 9 5 10 4 or 6 DE-9 Pin Number 3 7 2 8 5 Bare Board Pin Number Short 5 and 7 Short 9 and 10 4 or 6 DE-9 Pin Number Short 2 and 3 Short 7 and 8 5 RS-485 HALF DUPLEX PIN-OUTS Function Wire to both pins for Bus + Wire to both pins for Bus Signal Ground RS232 Pin Assignments Pin Assignment Signal Definition 1 CD Carrier Detect Output Used to show an RF connection
LRS400S Data Transceiver Users Manual RF Board Pinout The LRS400S series transceivers are available in both TTL and RS232 versions. The TTL versions use reverse polarity from standard RS-232 at 0 to 5 Volt levels. All pin descriptions and pin numbering are the same as the RS232 version.
LRS400S Data Transceiver Users Manual Frequency List The LRS400S transceivers tune from 406.1MHz to 430MHz with a tuning resolution of 6.25KHz. This gives a total of 3840 available channels. Using the license allowed frequency, the channel number can be determined using the following formula. Channel number = (FMHz - 390) / .00625 Note: This is an example list. If the required frequency is not listed use the FMHz formula to obtain the appropriate channel number.
LRS400S Data Transceiver Users Manual Channel # 3960 3970 3980 3990 4000 4010 4020 4030 4040 4050 4060 4070 4080 4090 4100 4110 4120 4130 4140 4150 4160 4170 4180 4190 4200 4210 4220 4230 4240 4250 4260 4270 4280 4290 4300 4310 4320 4330 4340 4350 4360 4370 4380 4390 4400 4410 Frequency 414.7500 414.8125 414.8750 414.9375 415.0000 415.0625 415.1250 415.1875 415.2500 415.3125 415.3750 415.4375 415.5000 415.5625 415.6250 415.6875 415.7500 415.8125 415.8750 415.9375 416.0000 416.0625 416.1250 416.1875 416.
LRS400S Data Transceiver Users Manual Channel # 5800 5810 5820 5830 5840 5850 5860 5870 5880 5890 5900 5910 5920 5930 5940 5950 Frequency 426.2500 426.3125 426.3750 426.4375 426.5000 426.5625 426.6250 426.6875 426.7500 426.8125 426.8750 426.9375 427.0000 427.0625 427.1250 427.1875 LUM0025AA Rev A Channel # 5960 5970 5980 5990 6000 6010 6020 6030 6040 6050 6060 6070 6080 6090 6100 6110 Frequency 427.2500 427.3125 427.3750 427.4375 427.5000 427.5625 427.6250 427.6875 427.7500 427.8125 427.8750 427.
