User Manual

Global Transceiver Module (GXM) Wireless Data Transceiver User Manual
LUM0031AA
Version 1.0 22
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. With a poor radio link, however, this could 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
Note: When using the transceiver in Modbus RTU mode, the Master Packet
Repeat setting must match in every radio, regardless of whether the
network is in Point-to-Point or MultiPoint mode.
Modbus RTU timing can be adjusted via this setting. See Modbus RTU Timing
(below) for more information
RS232/485 (C)
In the GXM, this setting must be set to 0.
Setup Port (D) 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.
Menu Port Additional Information
1 Main Only The terminal is connected to the Main Data Port.
2 Diagnostics Only The terminal is connected to the Diagnostic Port.
3 Both Ports The terminal may be connected to either port.
Setup mode is invoked by sending a "U" (Shift-U) when connected to the
Diagnostics pins, or by briefly shorting Pin 2 on the I/O connector to ground.
The Main Data Port consists of the Data Rx (7), Data Tx (5), and Gnd (4 or 13)
pins. The Diagnostics port consists of the Diag Rx (11), Diag Tx (12), and Gnd (4
or 13) pins.
FreeWave T
echnologies, Inc.
1180 S Flatiron Ct Ste F
Boulder, CO 80501
[phone]