User's Manual

FreeWave Technologies Spread Spectrum Transceiver User Manual

900 MHz and 2.4 GHz

V5.0S

The Baud Rate section of the user interface provides two other important

parameters, the ability to change the transceiver's word length and to put it into

ModBus RTU mode.

(2) Data Word Length and 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.

Data word length and parity selections available:

(3) ModBus RTU

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 transceivers in ModBus RTU mode the Master Packet

Repeat must be set to 3 regardless of whether the transceivers are being

used in Point to Point or Multipoint mode.

Note: The ModBus RTU mode must be selected in RS485 modems.

RS232/485

In products for which the protocol of the Data port is software selectable (such as

FGR09xx, FGR-115RC, FGR115W), use this menu to set the protocol of its data

Table 4: Data Word Length

and Parity

Selections

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