Auxiliary equipment maker Thoreson-McCosh Inc. replaced its 25-year-old machine control system, a proprietary circuit board, with one using microprogrammable logic controls from Siemens Energy & Automation Inc.
Thoreson-McCosh was able to reduce its engineering time and increase the flexibility of its equipment to accommodate the degree of customization in its products. The Siemens Simatic S7-200 controllers also makes it easier to maintain, troubleshoot and do diagnostics.
Thoreson-McCosh manufactures dehumidifying dryers, hot- air dryers, blending systems and vacuum conveying equipment.
“We did not have a PLC in use on our equipment,” said Jerry Muntz, vice president of engineering. “We were using a proprietary board that we developed in the early 1980s. It had evolved over time, and we were working on its third generation when we switched over to the Siemens PLCs.”
Under its old control method, Thoreson-McCosh did not have any historical data to help with preventive maintenance. Also, the machines could not be networked together.
Electro-Matic Products Inc., a supplier of automation components and services in Farmington Hills, Mich., recommended the Siemens Simatic S7-200 to Thoreson-McCosh.
Thoreson-McCosh is based in Troy, Mich. Siemens is in Norcross, Ga.
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