User's Manual

Page 49
4.2.2 Communic ation Ex ample (1 :n – Mode 3 )
This section describes an example of 1:n communication in packet transmission mode
(Mode 3). In multiple station topology, each station’s memory register setting must be
unique local station address (REG00). In this mode, all transmissions are made using the
transmit commands (TXT, TBN, etc.). The following example assumes that there are one
master and three slave stations.
4.2.2.1 Terminal Softw are Set up (1:n – Mode 3)
Set the terminal software as follows: (refer your software instructions for setup details)
bit rate: 9600 bps
data length: 8 bits
stop bits: 1 bit
parity bit: none
flow control: none
local echo: yes
terminator: carriage return + line feed
This setting corresponds to the factory default state of the modem. When REG20 and
REG21 are changed, change the terminal software setup accordingly.
Check for proper communication between the terminal equipment and the modem after
setting these parameters. To do this, turn the modem power on and with the communication
software running, enter “
@ARG CR/LF” at the terminal prompt. If functioning properly, the
modem should return the value of all 28 memory registers to the terminal screen.
4.2.2.2 Mode m Set up (1:n – Mode 3)
1. Set the local station addresses (REG00) as follows:
Master Station 000
Slave Station 1 001
Slave Station 2 002
Slave Station 3 003
2. Set Bit 0 of REG18 to “1” (to perform “destination address checking”)
3. Leave all other memory registers at the factory default settings.
Futaba Corporation Rev. 050415-01.1