User`s manual

Industio CP-132 Series User’s Manual
4-2
PComm
PCommPComm
PComm Installation
To install PComm
PCommPComm
PComm, run \Setup.exe from the diskette. Note that the PComm
PCommPComm
PComm diagnostic and
monitor utilities are for MOXA boards only. MOXA Windows NT, Windows 95/98, or
Windows 2000/XP device drivers, as well as MOXA boards are required. The drivers are
installed separately, with details given in the “Software Installation” chapter.
PComm
PCommPComm
PComm Programming Library
The serial communication library helps you develop programs for serial communications
for any COM port complying with the Microsoft Win32 API. It facilitates the
implementation of multi-process and multi-thread serial communication programs, and
consequently greatly reduces developing time.
For a complete library function description and sample programs for Visual C++, Visual
Basic, and Delphi, check the help file and the sample programs in the PComm
PCommPComm
PComm directory.
RS-485 Programming
If you intend to use your Industio CP-132U Series board for RS-485 applications, you can
refer to the RS-485 programming guide below, and also see the chapter, “Connection
Cables and Cable Wiring,” for more details about RS-485 operation.
The Industio CP-132U Series supports only 2-wire half-duplex RS-485 communication. In
this case, the data+/- pins are used for both data transmitting and receiving, depending on
the mode selected. The modes available are ADDC™ (Automatic Data Direction Control),
or By RTS.
ADDC™ (Automatic Data Direction Control)
The ADDC™ scheme is the best solution for RS-485 applications. To use ADDC™ mode,
set the mode switch to the ON position.
Under this mode, no extra code is required to control data transfer (both data transmitting
and receiving), since it is automatically managed with the board’s built-in intelligent
hardware mechanism. This means that RS-485 programming using ADDC™ mode is
just as simple and straightforward as RS-232 or RS-422 programming.
How to transmit and receive data for Windows NT, 95/98
In order to acquire precise timing control for RS-485 2-wire transmission, we recommend