User`s guide

CARROLL TOUCH Chapter 4 - Setting Communication Parameters
Touch System Diagnostics (CTDIAG) User’s Guide 4-3
Baud Rate
Baud rate is the speed of data transfer between the RS-232 controller
and the computer.
The default CTDIAG baud rate is autobaud for infrared systems and
9600 for guided wave systems.
The controller baud rate must match the CTDIAG baud rate. See the
RS-232 controller installation instructions for details on configuring the
jumper switch blocks. If the controller is configured to use autobaud,
CTDIAG can communicate with the touch system at all baud rates. If the
controller is set to a specific baud rate rather than autobaud, CTDIAG
and the controller must be set to the same baud rate.
Comm Port
A comm port is the interface that governs and synchronizes the flow of
data between the serial touch system and the computer. The default port
is COM1.
When you select a comm port, the port address and port interrupt are
automatically changed to the standard for that port.
• COM1: 3F8H and 4H
• COM2: 2F8H and 3H
• COM3: 3E8H and 4H
• COM4: 2E8H and 3H
If the RS-232 port address differs from the standard COM1 - COM4
address, you must define both a custom port address and custom port
interrupt. Port addresses may range from 200H to 3F8H, in modulo 8
increments; allowable port interrupts are 2, 3, 4, 5, and 7. When you
enter a non-standard port address or port interrupt, the comm port
reference is deselected.
Stop Bits
A stop bit is a bit inserted by the serial touch system into the data stream
to inform the computer that the transmission of a byte of data is
complete.
Parity
Parity is a parameter used for error-checking to ensure that the data that
was transmitted by the serial touch system is identical to that received
by the computer, and vice versa.