Introduction
The power plant for a small town has a single, coal fired boiler controlled by Bailey SLC controllers. Concerned about support issues for the aging controllers, the power plant initiated a control upgrade project.
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| Control board with new YS1700 | YS1700 dual loop display |
Application
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| New YS1700 Controllers in Panel |
The initial phase of the project involved replacing the following controllers:
- Main steam desuperheater
- Header pressure
Auxiliary feed water heater - Steam temperature
- Utility steam pressure
Solution
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| Graphic Programming Sample |
The customer evaluated a number of ½ DIN PID controller products. The new YS1700 dual loop controller from Yokogawa was the final selection. Reasons for the selection of the YS1700 included:
- YS1700 is a new product designed for extended product life.
- High impact, color LCD display
- Drag and drop graphic programming software
- Extensive communication options including
- MODBUS TCP
- MODBUS RTU
- Peer to peer.
- Complete backwards compatibility with previous generation Yokogawa controllers ( YS100 and YS80)
Using the graphic programming software for the YS1700, the system integrator working on the project recreated the existing Bailey control logic as new programs for the YS1700. The reduced panel depth of the YS1700 controllers allowed for easy rewiring.
The power plant is up and running with the new YS1700 controllers. Phase II of the upgrade which will replace all the remaining Bailey controllers is planned for 2008.
YS1700 vs Bailey SLC: panel depth
Industries
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Power
In the mid 1970s, Yokogawa entered the power business with the release of the EBS Electric Control System. Since then, Yokogawa has steadfastly continued with the development of our technologies and capabilities for providing the best services and solutions to our customers worldwide.
Yokogawa has operated the global power solutions network to play a more active role in the dynamic global power market. This has allowed closer teamwork within Yokogawa, bringing together our global resources and industry know-how. Yokogawa's power industry experts work together to bring each customer the solution that best suits their sophisticated requirements.
Related Products & Solutions
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YS1700
The YS1700 Programmable Indicating Controller can be tailored for various applications by running a user program, and offers high reliability thanks to Yokogawa's proprietary technology, user friendliness, and expandability.
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Single Loop Controllers
Single loop controllers receive temperature, flow rate, pressure, and other types of measurement readings from sensors and send corresponding instructions to control elements such as valves in order to maintain these values within a desired range.