User's Manual

Chapter Three Configuration
Man_455U-D Rev 3.01 Page 51
This example incorporates a single station connected to Master host device (Address 1), two
repeater stations with connected slave host devices (Addresses 14 and 21), and a remote
stations with a connected slave host device (Address 36).
This example uses Auto Online mode, which routes all messages according to the path set
with the &Z0 command. The path set with &Z0 command is configured to broadcast to the
entire system.
The host protocol is packet based, with message packets of up to 100 bytes. The master station
initiates all communication, and waits for a response from the slave devices.
Master Host site Modem configuration
AT&M0 - Configure mode 0 – Unacknowledged mode.
AT&L1 – Go directly online at startup
AT&U1 - Set Modem’s address to 1
AT&Z0=0,0,0 - Set all messages to go to the wildcard address, and repeat twice
Slave Repeater station address 14
AT&M0 - Configure mode 0 – Unacknowledged mode.
AT&L1 – Go directly online at startup
AT&14 - Set Modem’s address to 14
AT&Z0=1 - Set all messages to go directly to master station, address 1.
AT&R3, AT&H1 - Set Broadcast Repeater mode – Repeat wildcard messages on their
first hop, and send these messages out the serial port.
ATS17=4 – Set the receive hold-off. This ensures that the repeated messages from the
repeaters don’t clash with responses from the directly communicating device (address
15). This command sets the repeater to 200 msec hold-off.
Slave Repeater station address 21
AT&M0 - Configure mode 0 – Unacknowledged mode.
AT&L1 – Go directly online at startup
AT&21 - Set Modem’s address to 21
AT&Z0=14,1 - Set all data to go through address 14 to master station, address 1.
AT&R3, AT&H2 - Set Broadcast Repeater mode – Repeat wildcard messages on their
second hop and send these messages out the serial port.
#1
#14
#21
#36