We were requested by a leading blue chip chemical giant to automate a multi vessel production plant manufacturing a high quality, flammable material. The system had to control 12 vessels, and tight control of the plant was required. For this system we used a DCS - Siemens’s PCS7 product, this connected to multiple remote I/O nodes using Profibus. A full recipe system was supplied as part of the system, and although compliance with ISA S88 was not part of the brief, we utilised parts of this standard to suit the specific application to the client’s best advantage. A client server architecture was used with 4 clients plus the Engineering Station being on an Ethernet network. The system was fully commissioned and documented by ourselves, and has proved to be a very reliable solution.