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FreeWave LRS400S Manual

Data transceiver
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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 1.0
i

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  • Page 1 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 1.0...
  • Page 2 (RMA) for evaluation of Warranty Coverage. In no event will FreeWave Technologies Inc., its suppliers, and its licensors be liable for any damages arising from the use of or inability to use this Product. This includes business interruption, loss of business information, or other loss which may arise from the use of this Product.
  • Page 3 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.

  • Page 4: Table Of Contents

    LRS400S Data Transceiver Users Manual Table of Contents ABOUT FREEWAVE TRANSCEIVERS.........................6 CHOOSING A LOCATION FOR THE TRANSCEIVERS..................6 ................7 HOOSING OINT OINT OR OINT ULTI OINT PERATION QUICK START ON A POINT-TO-MULTIPOINT NETWORK ................8 ........................8 OINT ULTI OINT PERATION QUICK START ON A POINT-TO-POINT NETWORK..................9 ...........................9...
  • Page 5 LRS400S Data Transceiver Users Manual RS-485 Half Duplex Pin-Outs..........................30 RS232 P ............................30 SSIGNMENTS RF B ..............................31 OARD INOUT ..........................31 ECHNICAL UPPORT LUM0025AA Rev A Version 1.0...

  • Page 6: About Freewave Transceivers

    Placement of the FreeWave transceiver is likely to have a significant impact on its performance. The key to the overall robustness of the radio link is the height of the antenna. In general, FreeWave units with a higher antenna placement will have a better communication link. In practice, the transceiver should be placed away from computers, telephones, answering machines and other similar equipment.

  • Page 7: Choosing Point-To-Point Or Point-To-Multipoint Operation

    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. In its simplest form, a MultiPoint network functions with the Master broadcasting its messages to all Slaves and the Slaves responding to the Master when given data by the device connected to the data port.

  • Page 8: Quick Start On A Point-To-Multipoint Network

    Set FreqKey, Max Packet Size, Min Packet Size, RF Data rate identical on all radios in the network. Note: Changing these values may help to eliminate interference from other FreeWave networks. • Press Esc to get back to Main menu.

  • Page 9: Quick Start On A Point-To-Point Network

    FreeWave Wireless Data Transceivers just received from the factory: Connect antennas to the transceivers. Freewave Technologies recommends that the antenna port be loaded at all times to prevent damage to the LRS400S radios. Noise potential may be reduced on the bench by lowering the Xmit power.

  • Page 10: 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.
  • Page 11 Point-to-Point Mode 6 allows the transceiver to be controlled entirely through software Slave/Master commands. A number of key parameters in FreeWave's user interface may be Switchable (6) changed either directly with a program such as Windows Terminal or through the use of script files.

  • Page 12: Baud Rate

    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.
  • Page 13 There are six data word length and parity configurations available to be used with Data, Parity 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.
  • Page 14 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.

  • Page 15: Call Book

    The Master must be programmed to call the Slave. The Call Book allows users to incorporate up to 10 FreeWave transceivers, and designate which Slave the Master will call. To set the Entry to Call option, select the appropriate option in the drop down.

  • Page 16: Radio Transmission Characteristics

    The 400MHz Data Transceiver has the option to operate in a Frequency Division Duplex mode by transmitting on one frequency and receiving on another. The LRS400S transceivers must be programmed to operate on the appropriate frequency. To program the transceiver for single channel operation, enter the frequency, in Megahertz, into the TX and RX Frequency slots.

  • Page 17: And (2) Max Packet Size And Min Packet Size

    LRS400S Data Transceiver Users Manual (2) M ACKET IZE AND ACKET 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.

  • Page 18: Xmit Rate

    9 is the lowest duty cycle. (4) RF D FreeWave transceivers have five settings for the RF Data Rate (1, 2, 3, 4, 5 ). RF Data Rate should not be confused with the serial port Baud Rate.

  • Page 19: Slave Security

    Slave may need to accept calls from more than 10 different Masters. When Slave Security is set to 1, the transceiver will accept calls from any other FreeWave transceiver. Additional network security measures may be taken to prevent unauthorized access, such as changing default settings for FreqKey, Hop Table or Frequency Zones.

  • Page 20: Lowpower Mode

    Note: Setting Retry Time Out to 20 is recommended in areas where several FreeWave networks exist. This setting will allow Slaves to drop the connection if the link becomes too weak, while at the same time prevent errant disconnects due to interference from neighboring networks.

  • Page 21: (C) Remote Led

    LRS400S Data Transceiver Users Manual (C) R EMOTE This setting enables the user to connect Remote LED’s through the diagnostics port. Setting Description Notes Board LED’s Default. Only on board LEDs are enabled. Board and Remote LED’s Onboard LED’s are enabled as well as Remote LED’s through the Diagnostic port.

  • Page 22: Multipoint Parameters

    EPEATERS The Repeaters selection must be set to On if a repeater is to be used in the network. However, if the network will not utilize a repeater, FreeWave recommends setting Repeaters to Off to provide higher throughput. (1) M...

  • Page 23: Max Slave Retry

    LRS400S Data Transceiver Users Manual (2) M LAVE ETRY 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.

  • Page 24: (A) Slave/Repeater

    A second computer or serial connection to run the diagnostics software. A diagnostics cable. (Available from FreeWave Technologies.) Diagnostics software. (Available on the User Manual and System Tools CD.) For more information on Diagnostics, please contact FreeWave Technical Support at (303) 381-9200. (C) S UBNET The Subnet ID function only works in MultiPoint Networks utilizing the Network ID option.

  • Page 25: (D) Radio Id

    LRS400S Data Transceiver Users Manual 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.

  • Page 26: Radio Information

    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.

  • Page 27: Average Signal Level

    ADIO EMPERATURE The Radio Temperature value is the current operating temperature of the transceiver in degrees Celsius. For proper operation, a FreeWave transceiver must be in the temperature range of -30° to +60° C. LUM0025AA Rev A Version 1.0...

  • Page 28: Factory Default Settings

    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 Default Point to Point Slave (1) MASTER PACKET REPEAT 0 Set Baud Rate Default...

  • Page 29: Operational Rs-422 And Rs-485 Information

    The most common operation of RS-485 is a two-wire comprised of a 120 ohm impedance single twisted pair. In this system the loading of the FreeWave transceiver is as described above which allows up to 256 1/8 unit load units on the bus. Maximum line length is also 4,000 feet with a third wire required for data common.

  • Page 30: Rs-422 And Rs-485 Full Duplex Pin-Outs

    LRS400S Data Transceiver Users Manual RS-422 RS-485 F UPLEX Function Bare Board Pin Number DE-9 Pin Number Signal Ground 4 or 6 RS-485 H UPLEX Function Bare Board Pin Number DE-9 Pin Number Wire to both pins for Bus +...
  • Page 31 For up-to-date troubleshooting information check the Support page at www.FreeWave.com. FreeWave provides Technical Support, Monday through Friday, 8:00 AM to 5:00 PM, Mountain Time (GMT -7) Call us toll-free at 1-800-548-5616 or factory direct after hours at 303-381-9200 or email us moreinfo@FreeWave.com...
  • Page 32 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.
  • Page 33 LRS400S Data Transceiver Users Manual Channel Channel Channel Channel Frequency Frequency Frequency Frequency 3960 414.7500 4420 417.6250 4880 420.5000 5340 423.3750 3970 414.8125 4430 417.6875 4890 420.5625 5350 423.4375 3980 414.8750 4440 417.7500 4900 420.6250 5360 423.5000 3990 414.9375 4450 417.8125...
  • Page 34 LRS400S Data Transceiver Users Manual Channel Channel Channel Channel Frequency Frequency Frequency Frequency 5800 426.2500 5960 427.2500 6120 428.2500 6280 429.2500 5810 426.3125 5970 427.3125 6130 428.3125 6290 429.3125 5820 426.3750 5980 427.3750 6140 428.3750 6300 429.3750 5830 426.4375 5990 427.4375...

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