Research Concepts RC2500 - Manual (Page 94)

RC2500 Antenna Controller Appendix E RC2500 Comm Protocol 87
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C Program
A C program, RC2500_A.EXE, has been written which allows a user to send commands to the RC2500
via the serial port. The program runs on an IBM PC (or compatible) and was designed to aid the software
developer who is writing programs to control the RC2500 or an installer verifying the serial port wiring. All
of the commands listed above can be sent to the controller. The program features three windows. In the
top window the user is prompted for commands to send to the controller. In the middle window, the
command strings sent to the controller are displayed. The bottom window displays all characters
received from the controller. The source code is included with the program and a developer may
examine and freely use any of the routines. A disk containing this program is included with each
controller. Because the program displays all characters both sent to and received from the controller it is
useful for performing loopback tests to verify the host computer serial port wiring.
Message Delimiters
Here are the delimiters used with SA bus messages, along with their value’s in hex and decimal.
ASCII name Hex value decimal value
STX 2 2
ETX 3 3
ACK 6 6
NAK 15 21