User's Manual

Spread Spectrum Wireless Data Transceiver User Manual
LUM0002AF Rev E Version 6.3 25
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 (A)
Six data word length and parity configurations are available to be used with
FreeWave transceivers. The default setting is 0 (8, N, 1) and is the most commonly
used serial communications protocol. When Data, Parity are selected from the
Baud Rate menu, a prompt to enter a value for Data, Parity displays. The following
describes each option:
Menu Setting Data Bits Parity Stop Bits
0 8 None 1
1 7 Even 1
2 7 Odd 1
3 8 None 2
4 8 Even 1
5 8 Odd 1
Modbus RTU (B)
Support for Modbus RTU protocol is available. The default setting for Modbus
RTU is 0 (Not Enabled).
To enable the Modbus RTU mode:
1. In the Set Baud Rate menu enter (B) and then select 1
2. In the Set MultiPoint Parameters menu, set Master Packet Repeat to 3.
Note: When using the transceiver in Modbus RTU mode, the Master Packet
Repeat must be set to 3 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.
RS232/485 (C)
In products for which the protocol of the data port is software selectable (FGR09xx,
FGR-115RC, FGR115WC, etc.), use this menu to set the protocol of the data port.
In TTL RF board products (FGR09Tx) and Ethernet products (FRG-115RE), this
setting must be "0".
Menu Protocol Additional Information
0 RS232 Also used for TTL and Ethernet transceivers.
1 RS422 Modbus RTU mode must be enabled. See above.
2 RS485 Modbus RTU mode must be enabled. See above.
3 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.