Systems Integration Services for Bio-Solids Facility
Harris Group Inc. provided system integration services for the Bio-Solids Facility at the Tri-City WWTP facility located in Clackamas, Oregon. The Bio-Solids Facility composes of the following equipment;
· Andritz centrifuge system includes the triple head polymer injector, lubrication unit, centrifuge rotating assembly, backdrive system, centrifuge starter panel, cake conveyors and cake hopper.
· Two gravity belt thickeners (GBT).
· Two US Filter Polymer Control System.
· Associated balance of plant pumps, motors, equipment and instrumentation.
· Video operation surveillance system
System integration services included assisting with the testing, commissioning, and startup of the Bio-Solids Facility. Plant HMI SCADA screens (Wonderware) where development and PLC programming was performed to the existing plant control system that act as an interface to the Andritz and US Filter Control System. Supporting PLC and HMI programming was performed to assist Andritz and US Filter using S7 Siemens Programmable Logic Controllers (PLC).
In addition to the PLC, the Control System consists of two Siemens OP-3 operator stations that interface to the Polymer system. Two PanelView operator terminals, panels that each controls their corresponding Gravity Belt Thickener (GBT). And one Wonderware operator terminal that interfaces to the centrifuge.
The Control System communicates consist of two separate networks. Field network that communicate via Profibus, and SCADA/TI communicates that communicate via Ethernet. The S7 PLC's communicate via Profibus-DP. And the Endress & Hauser level transmitter and flowmeters communicate via Profibus-PA. The S7 interfaces with related DeviceNet Motor Control Centers (MCC's) via profibus to DeviceNet converter.
