First of all, I apologize if there is a simple solution, if there is, I can't seem to find It. I simply want to make and HMI talk to a PLC using Omron's FINSGateway/SYSMAC window's drivers.. Heck, if I can get an example that uses a simple Excel spreadsheet talking via DDE that would help. I have been writing custom drivers in Windows for years to send FINS commands back and forth to the various Omron PLC's, based off of a bit change either on the HMI side or PLC side. Super fast since only the data that has changed is written back and forth... Lately I have tried using DDE (polling type) communications as some jobs require this and not custom drivers. We use Wonderware Intouch for the most part and have found their DA and OI servers for Omron to be terrible at communications on large IO installations. Their IO servers essentially send 1 packet per bit or word every x msecs over the network according to a wireshark capture instead of blocks of word ranges. I was told FINSGateway / Sysmac Gateway could be installed on a machine and map via datalink( or the sorts) PLC memory to psedo PLC memory on the windows computer; that the local computer mimics a PLC. The third party application can then read the local memory many times faster than going across the network to get it packet by packet. I can't seem to find a simple 'DDE' type interface with FINSgateway whether trying to use it locally or to a remote PLC. Usually a Topic name and an Item / Tagname.... I have used these DDE interfaces with other brand PLC controllers and their local driver, but can't find squat with the Omron Driver. Usually you specify in the HMI a tagname and it is pointed to a 'TOPIC' and 'ITEM' that relates to an address in the PLC. Anyone have any type of info on this? I see posts in forums about doing this, but can't find any specifics. Again, I would think this would be basic beginner stuff, but can't seem to find any info on FINS/SYSMAC gateway and how to make a third party app talk to it. It's been around for many years so I find this odd. Thanks for your time..