PLCTHERM.EXE Explanation.

This program reads out temperature from a Siemens TI545 Programmable Logic Controller (PLC) connected to
a com port. To run this program, you must have a TI545 PLC with a 505-7028 Thermocouple module and you also
need RXASYNC.DLL for the serial communications. No ladder logic is necessary, just put the PLC in run mode and
set the thermocouple module I/O address using TISOFT. RXASYNC.DLL is written by Crucial Applications
(Author: Ian Timms) and is a serial communications package for REXX.
DLL library and source code are available at most sites where OS/2 programs are circulated.

When PLCTHERM is first run, the program asks you to select the com port (default COM1. Parameters 19.2kBd, 7, 1, E are
hard coded and can't be changed), the thermocouple PLC address (default WX105) and units (default Fahrenheit).
Make your selection and press SAVE to start reading the PLC. The program will read the PLC every five seconds
and update the temperature display in the window and the title bar. If you minimize the program, the
temperature will show up in the icon title. Note: Place RXASYNC.DLL into the same directory as PLCTHERM.EXE or
the program will not work.

This is freeware and you are free to distribute this program as long as you keep all the original files together.

If you have any questions or comments, e-mail 73322.2045@compuserve.com or visit my home page at
http://ourworld.compuserve.com/homepages/aschw

