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 12
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.
The settings for the Slave(s) not determined by the Master are RF Xmit Power, Slave Security, Retry
Time Out and Hop Table Size, Hop Table Version, and Hop Table Offset.
Edit Radio Transmission Characteristics
SETTING XMIT AND RCV FREQUENCIES
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 LRS-455-EU 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.
If the transceivers are to operate in Frequency Division Duplex, the TX and RX Frequency slots will have
different frequencies assigned.
(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.