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Projects: 2010


Lin & Associates developed the TDC 3000 database configuration and Honeywell GUS graphics for two projects designed to improve our client’s utilization of resources thus reducing their environmental impact. The configuration for these projects involved standard industry practices such as three-element level control and air to fuel cross limiting. These projects also required Lin & Associates on-site loop check and startup support services thus allowing our client to take advantage of Lin & Associates knowledge of the Honeywell TDC 3000 system and Refinery Process Controls.


Lin & Associates developed a complete site specific Yokogawa Graphics Package and HMI graphics for a grassroots refinery in India. The HMI graphics and Yokogawa subpictures were developed following the Abnormal Situation Management(ASM) standards and industry accepted human factors guidelines. Upon completion of the HMI Graphics and subpictures Lin & Associates travelled to India for the Factory Acceptance Testing(FAT) to integrate the ASM graphics with the DCS configuration. This process and the best practice standards followed by Lin & Associates ensured that our client received the best possible product with the assurance that their graphics would enable smoother operation of a newly constructed grassroots facility.


Lin & Associates worked with multiple customer sites in 2010 to integrate Triconex/Trident and Safety Manger Systems with their Honeywell DCS in many areas of the refining process including Crude Units, SRU’s, and FCCU’s. This process included building SCADA points for interfacing with the C200/300 DCS and Array or CLM points for interfacing with the TDC 3000 DCS. The Lin & Associates custom Safety System shapes were also utilized to develop independent SIS HMI graphics for GUS and Experion HMI’s. One challenge that was encountered during our C300 – SIS integration projects was determining a standard for using PCDI and OPC Integrator to enable interaction between PLC points and DCS C300 points. Once this standard was developed it was possible to create deviation, alarming, or average points in the DCS that compared hardwired PLC points with hardwired DCS points. With Lin & Associates constant involvement in DCS – SIS integration projects we continue to develop and improve our industry best practices and standards in this area of Control System Automation.


Lin and Associates provided engineering services for a new coker plant which included two coker trains, one DHT, one NHT, two SWS, and two sulfur recovery trains. The initial project scope was to design 450 Honeywell Experion® HMIWeb process and SIS graphics and provide FAT support. Proven DCS knowledge and experience resulted in the expansion of this scope to on-site commissioning of the as-built database consisting of approximately 6500 C300 points and 8300 SCADA points. Third-party interface with 26 PLCs, including a fully integrated Triconex ® safety system, was configured using both SCADA and PCDI techniques. Additionally, Lin and Associates integrated the new coker plant additions with the existing process plants. Existing process plant modifications included addition of one PSA and one VDU, as well as increased capacity for plant water services. The project scope was to design 61 new Honeywell Experion ® HMIWeb process and SIS graphics, modify 74 existing Honeywell Experion ® HMIWeb process graphics, configure and modify approximately 1000 C300 points and 850 SCADA points. Lin and Associates saw the project to completion by providing 24-hour start-up support which included DCS configuration and logic consultation, graphics modifications, and on-console operator assistance and education for all associated units.


Lin and Associates developed an extensive control methodology for a closed loop cooling water system. We provided DCS configuration for process control schemes simultaneously covering four operating units. The programming for the control schemes included permissive startup and shutdown logic, PMCL and AMCL code development for alarm switching and annunciating, application module configuration, and graphics building for Honeywell TDC 3000. Following the client’s development standards, we revised and develop approximately 80 subpictures for the creation of 50 operating graphics. Requirements for four interconnected LCN networks to accurately portray the working environment were implemented in-house. This allowed for logic testing with the full simulation of the cross network communications. A strategy of shadowing data, token control, and alarm switching and handshake logic were employed to meet the client’s design criteria.