CHAPTER 5: Using the Command Port
31
You can connect up to eight Multiserver 500s in a
daisychain and control the chain from a single
asynchronous terminal. Figure 5-3 shows the
topology for a typical three-Multiserver 500 local
installation. Before connecting them, you must
configure each Multiserver 500 with a fixed data
rate and then with a device number from the LCD
and keypad. (See Figure 5-4.) The default values are
8 data bits, 1 stop bit, no parity, autobaud, no flow
control, and local echo enabled.
At least one unit must be set to 1; each of the
other units may be set randomly to any number in
the range of 2 through 8, as long as no two units
have the same number.
5.3 Impedance Strapping
Multiserver 500
Unit 1
Cmd
In
Cmd
Out
Multiserver 500
Unit 2
Cmd
In
Cmd
Out
Multiserver 500
Unit 3
Cmd
In
Cmd
Out
Async
Terminal
Strap
for High Impedance
Strap
for High Impedance
Strap
for Low Impedance
Figure 5-3. Typical Three-Multiserver Daisychain Topology.
Command Port
Configure Parameter
Data Rate
Auto
1200
4800
9600 19200
Device Number
0.............8
Main Menu
Figure 5-4. Setting the Data Rate and Device Number.