User's Manual

SERIAL COMMUNICATIONS

4 SERIAL COMMUNICATIONS

4.1 OVERVIEW

The C827 offers RS232 communications. Normally, the RS232 interface is used to program

and test the device but can also be used as a point-to-point serial connection.

Communications parameters are set by DIP switches located inside the reader/writer or by

the configuration program accessed over the RS232 port.

CAUTION:

Do not bundle communications wiring with high current power lines. This will cause

communications errors.

4.2 RS232 INTERFACE

The C827 is set by the factory to initially communicate via RS232, during the first four

seconds after power-on the device will respond to commands from the RS232 lines. If no

commands are received by the reader/writer during the five seconds, the reader/writer will

continue according to the position of DIP switches. For more information on the Configuration

Menu refer to Chapter 5.

To communicate with the device via RS232, set the serial communications parameters of the

host as follows:

Baud rate 9600

Parity none

Data bits 8

Stop bit 1

NOTE: The reader/writer automatically resets to 9600, N, 8,1 for five seconds whenever the

power is cycled, after which it will apply the setting made in the configuration menu.