Daniel, See http://www.softing.com/e/PRODUCTS/INDUSTRIAL_COMMUNICATION/products/PROFIBUS/profibus_products.html for Softing's monitor software and PC cards. I have not used their software myself yet but have been told of its utility. Siemens has a freeware Profibus analyzer software called Amprolyzer. But, it only works with Siemens profibus cards, and it only runs on Win95. I used it in the profibus certification class I attended and it gave full details on the profibus telegrams. If you can scrounge up a Siemens card, I can send you the Amprolyzer program. I can also send you a Word document that explains the content of the profibus telegrams as seen in the Amprolyzer. Mike Adams Mitsubishi Polyester Film, LLC Greer SC USA 864-879-5231 _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave