User's Manual
Table Of Contents
- FreeWave Technologies
- LRS-455-EU
- Data Transceiver
- Version 1.0, Revision A
- About FreeWave Transceivers
- Choosing a Location for the Transceivers
- Quick Start on a Point-to-Point Network
- Setting up a Transceiver
- Operation Mode
- Baud Rate
- Modbus RTU Timing
- The Modbus RTU setting causes the radio to wait for an amount of time, “gathering” data before sending out the radio link.
- With a setting of 0 (Disabled), the radio will send data out its radio link as soon as the data is received into the serial port.
- With a setting of 1, the radio will wait for a number of slots equal to 2 times the Master Packet Repeat setting before sending the received data out the radio link. For example, if Master Packet Repeat = 3, the radio will wait for 6 slots, gathering ...
- With a setting of 2 and higher, the radio will wait for a number of slots calculated by the following formula:
- (Modbus RTU Setting + Master Packet Repeat Setting + 1) x 2
- For example, in a radio where the Modbus RTU setting = 2 and the Master Packet Repeat setting = 3, the radio will wait for (2+3+1) x 2, or 12 slots.
- Call Book
- Radio Transmission Characteristics
- Edit Radio Transmission Characteristics
- MultiPoint Parameters
- Edit MultiPoint Parameters
- Radio Information
- Operational RS-422 and RS-485 Information
- RS232 Pin Assignments
- RF Board Pinout
- FreeWave Technical Support
- Errata
LRS-455-EU Data Transceiver Users Manual
LUM0032AA Rev A Version 1.0 iii
UL NOTIFICATION
Models LRS-455-EU-C, LRS-455-EU-C-MS, LRS-455-EU-CE, and LRS-455-EU-CW
are suitable for use in
non-hazardous locations only. Input voltage for the above models is 6 to 30 volts DC.
WARNING: DO NOT REMOVE OR INSERT DIAGNOSTICS CABLE WHILE CIRCUIT IS LIVE UNLESS THE AREA
IS KNOWN TO BE FREE OF IGNITION CONCENTRATIONS OF FLAMMABLE GASES OR VAPORS.
FCC NOTIFICATIONS
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: 1) This
device may not cause harmful interference and 2) this device must accept any interference received, including
interference that may cause undesired operation.
This device must be operated as supplied by FreeWave Technologies, Inc. Any changes or modifications made to the
device without the express written approval of FreeWave Technologies may void the user's authority to operate the
device.
CAUTION: The LRS-455-EU transceivers have a maximum transmitted output power of 2W. It is recommended that
the transmit antenna be kept at least 18.3 cm away from nearby persons to satisfy FCC RF exposure
requirements.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications. However, no
guarantee shall be made that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Note: Whenever any FreeWave Technologies module is placed inside an enclosure a label must be placed on the
outside of that enclosure which includes the module's FCC ID.
IC N
OTIFICATIONS
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two
conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including
interference that may cause undesired operation of the device.
Ce dispositif est conforme aux normes permis-exemptes du Canada RSS d'industrie. L'opération est sujette aux deux
conditions suivantes : (1) ce dispositif peut ne pas causer l'interférence, et (2) ce dispositif doit accepter n'importe
quelle interférence, y compris l'interférence qui peut causer le fonctionnement peu désiré du dispositif.
Note: The LRS-455-EU transceivers are approved for use in Canada within the 450MHz to 470MHz
band.