I don't know if this has any bearing on the MODBUS protocol, but Invensys made a major change in v6.2.1 of the Micro I/A software on the LSCO1's on type J and K thermocouples connected to Allen-Bradley Remote I/O. This change caused the thermocouples to read 20 deg. F too high after the upgrade. They may have done something similar, such as re-scale the raw counts or change some other critical parameter in the MODBUS software. Double and triple check the ECB108 and ECB109 descriptions and the appendices in the v6.2.1 manual, and compare them to the documentation you got with the v6.2RA beta version, you may find some surprises. Tim Lowell Control Systems Engineer Phillips Petroleum Company, Trainer Refinery Phone: 610-364-8362 Fax: 610-364-8211 tlowell@xxxxxxxx -----Original Message----- From: Deon Kriel [SMTP:dkriel@xxxxxxxxxxxx] Sent: Friday, November 16, 2001 1:12 AM To: Foxboro@Freelists. Org (E-mail) Subject: [foxboro] FW: Micro I/A Ver.6.2.1 MODBUS problem. Subject: Micro I/A Ver.6.2.1 MODBUS problem. We have installed the new Micro I/A ver. 6.2.1 image at Lever Ponds on Saturday. All the analog feed backs we received from a Schenk PLC (MODBUS protocol) were incorrect. Sunday morning 4am, we had to re-load Ver.6.2RA. This fixed the problem. WORK DONE BEFORE TESTING. 1) SaveAll 2) Initialize, reboot and LoadAll. 3) Rebuild ECB109 4) Check LONG_S in blocks FIIN and FIOUT SYSTEM CONFIG. * AW51D * 2 X Micro I/A (Modbus) * 2 X CP60 * 6 X CP30 * 1 X CLI * 6 X X-Terms We need to know what to do to fix this problem, because the customer does not want to run a beta version. If you need more info, please contact me. Best Regards Deon Kriel Protea Automations Solutions Tel. : +27 11 719-5740 Fax : +27 11 887-8757 Cell : +27 82 575-9908 _____ This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit <http://www.marshalsoftware.com> www.marshalsoftware.com _____ ############################################################################ ######### This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal For more information please visit www.marshalsoftware.com ############################################################################ ######### ___________________________________________________________________ This list is neither sponsored nor endorsed by The Foxboro Company. Use the information obtained here at your own risk. For disclaimer, see http://www.thecassandraproject.org/disclaimer.html#maillist list info: //www.freelists.org/list/foxboro subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave ___________________________________________________________________ This list is neither sponsored nor endorsed by The Foxboro Company. Use the information obtained here at your own risk. For disclaimer, see http://www.thecassandraproject.org/disclaimer.html#maillist list info: //www.freelists.org/list/foxboro subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave