I have some Operator IT PPB and Conductor NT systems I need to update. Shall I use SPlus or 800 xA HMI system ?
ABB have not been very clear about selling 800xA v's Symphony+ so its difficult to get a clear picture of where the bailey product line is heading. You're not the first person to ask this question ... http://www402.abbext.com/Names-ABB-DC...
Essentially, if you currently have a Symphony system and want to keep your Bailey controlers and associated investment, then "Symphony Plus" is the evolution path for your DCS. However, you really should get an ABB sales rep to come to your site and give you a comprehesive presentation on where you are right now and where S+ and 800xA can take you.
Also, http://www.abb.com/product/us/9AAC115... , which may (or may not ) help.