| Control Panels |
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Piggable Header Oil Blending
The skid found in the Blending section required a unique control panel solution:
"... utilizes an Allen Bradley® Slic 500® PLC, with a National Instruments - Lookout interface (flush panel mount PC) based on a Microsoft Excel spreadsheet for the data storage. The Slic 500 is capable of 1000 I/O. In conjunction with an auxiliary source for storage of the formulas (in this case, Excel), the PLC is programmed to manage three simultaneous blends based on the Recipe coded into the PLC. The PLC is the platform for the formulas to be pulled into, up to three at a time, one for each header. Setting up the PLC in this manner allows the Excel spreadsheet to store up to 65,000 formulas, while the PLC is then avail be to run multiple recipes without the burden of storage of recipes and formulas.. Using Excel for data storage, easy addition/deletion/editing of formulas is possible from a networked computer. Additionally, the selected interface allows for easy viewing of the system from any LAN-based web browser (specifically Internet Explorer, which is available for both Macintosh®, and Windows® based computers) pointed at the assigned IP address of the control system/PLC. Both Macintosh- and Windows-based PCs are capable of editing spreadsheets and viewing web pages."
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Booster System Controls
Booster controls allow lead / lag pump rotation for duplex, triplex, or quintiplex systems. The standard PLC is an Allen-Bradley MicroLogix® 1200 which allows compatibility with the main control system for virtually any VFD on the market. Full controls with line reactors and for independent VFDs and disconnects are mounted on upright panel behind the main control panel). This system required spearate mounting of the control panel and other electrical components from the booster skid.
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Allen-Bradley, MicroLogix, and SLC 500 are registered trademarks of Rockwell Automation, Inc.
Macintosh is a registered trademark of Apple Inc. |
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