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RFI-9256 Radio Modem User Manual Page 50 of 96
5.13 Hayes Dial-up Auxiliary I/O
Hayes dial-up connections can be used to control auxiliary I/Os. Whenever a dial-up connection is
established, the I/Os will mirror each other. When the dial-up connection is terminated the I/O outputs on
either end of the connection will retain their state but will no longer change. This scenario is shown in Figure
22.
RFI-9256
Master
RFI-9256
Slave 1
RADIO CONFIGURATION
Unit is a MASTER
Network Address: 26
Hopping Pattern: 30
Local Address: 1000
PROTOCOL CONFIGURATION
Main Port: Hayes Dial-up
AUXILIARY I/O CONFIGURATION
Auxiliary I/O Follows Remote ENABLED
Direction: Bit0 = output; Bit1 = input
RFI-9256
Slave 2
RADIO CONFIGURATION
Unit is a SLAVE
Network Address: 26
Hopping Pattern: 30
Local Address: 2000
PROTOCOL CONFIGURATION
Main Port: Hayes Dial-up
AUXILIARY I/O CONFIGURATION
Auxiliary I/O Follows Remote ENABLED
Direction: Bit0 = input; Bit1 = output
RADIO CONFIGURATION
Unit is a SLAVE
Network Address: 26
Hopping Pattern: 30
Local Address: 3000
PROTOCOL CONFIGURATION
Main Port: Hayes Dial-up
AUXILIARY I/O CONFIGURATION
Auxiliary I/O Follows Remote ENABLED
Direction: Bit0 = input; Bit1 = output
0
1
0
1
0
1
Figure 22: Hayes Dial-up auxiliary I/O
In the Hayes dial-up situation, when the master dials slave 1, the auxiliary I/O 0 on the master will mirror the
value on the slave, while the input 1 on the master will be mirrored on output 1 on the slave. When the
master hangs-up the connection, output 1 on slave 1 will remain at the last value of input 1 on the master.
The same situation can be repeated when the master dials slave 2.