SETTING THE FACEPLATE JUMPERS
SNAP-LCSX AND LCSX-PLUS Installation Guide
9
Setting the Host Port
The controller host port jumpers H0 and H1 determine which port the controller’s default host task will be
started on. Because the host task is required for communication to any of Opto 22’s programming or interface
software, the default host port must be set to the port attached to the host computer. The factory setting is
COM0.
You can change the host port to COM1, as shown in the table at right.
However, in general it should not be used this way with I/O, since COM1 was
designed to communicate with I/O.
Setting the Host Port Baud Rate
The factory setting for the host port baud rate is 38.4 KBd, but
baud rates from 300 Bd to 115 KBd are selectable using
jumpers B0 through B3. In general, it is best to choose the
fastest baud rate the host computer and the controller will
both support. Lower baud rates may be necessary for long
cable runs, in high-noise environments, or for compatibility
with modems or other data transmission equipment. The table
at right shows jumper settings for available baud rates. The
shaded entry is the default setting.
Address Jumpers.
COM Port
H0
H1
COM0
In
In
COM1
Out
In
Baud Rate
B0
B1
B2
B3
115.2 KBd
Out
In
In
In
76.8 KBd
In
Out
In
In
57.6 KBd
Out Out
In
In
38.4 KBd
In
In
Out
In
19.2 KBd
Out
In
Out
In
9600 Bd
In
Out Out
In
4800 Bd
Out Out Out
In
2400 Bd
In
In
In
Out
1200 Bd
Out
In
In
Out
600 Bd
In
Out
In
Out
300 Bd
Out Out
In
Out
