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 8
Baud Rate Description
Actual Baud Rate
(selections 0-9)
The actual baud rate for the transceiver’s data port.
It is desirable to set the baud rate to the highest level supported by the device to
which it is connected. In certain circumstances, however, this may actually result
in slower data communications.
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.
Data Bits Parity Stop Bits
8 None 1
7 Even 1
7 Odd 1
8 None 2
8 Even 1
8 Odd 1
Modbus RTU
Support for Modbus RTU protocol is available. The default setting for Modbus
RTU is 0 (Not Enabled).
To enable Modbus capability, set Modbus RTU to 1.
Note: When using the transceiver in Modbus RTU mode, the Master Packet
Repeat must match in every radio with Modbus RTU enabled, regardless of
whether the network is in Point-to-Point or MultiPoint mode. The Modbus RTU
mode must be selected when transceivers are configured in RS485 or RS422
mode.
Serial Interface
In products for which the protocol of the data port is software selectable, use this
menu to set the protocol of the data port. In the TTL RF board product this setting
must be "0".
Protocol Additional Information
RS232 Also used for TTL transceivers.
RS422 Modbus RTU mode must be enabled. See above.
RS485 Modbus RTU mode must be enabled. See above.
DOT Special for the Department of Transportation.
Note: When DOT mode is enabled, the TimeDelay settings operate the same as
in the RS485/422 mode.
Note: RS4xx mode must have Modbus RTU enabled, and TurnoffDelay set to at
least 4.
Setup Port
Note: DO NOT change this setting unless the correct programming cable is
available for the new setting.
This setting determines which port, Main or Diagnostics, is used to enter the Setup
Main Menu.
Port Additional Information
Main Only The terminal is connected to the Main Data Port.
Diagnostics Only The terminal is connected to the Diagnostic Port.
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