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Article | April 30, 2003
Pouch maker makes progress with PLS
New PLS plug-in module offers easier programming, less wiring, and less hardware for hf/f/s manufacturer.
Easier programming less wiring and less hardware are benefits of a new plug-in Programmable Limit Switch (PLS) from Electro Cam (Roscoe IL) for the Pouchmaster hf/f/s machine from HMC Products (Rockford IL). The PLS plugs into the system’s Allen-Bradley SLC-500 Programmable Logic Controller (PLC) from Rockwell Automation (Milwaukee WI). The PLS turns output signals on and off according to the relative position of a rotating shaft. PLSs are typically used to increase the accuracy of material or product positioning or registration. Previously the machinery manufacturer was using a stand-alone PLS. The new PLS simply plugs into the system’s PLC. “Between Electro Cam’s plug-in module and competing solutions the cost difference is negligible” says Dave Kreissler of HMC Products. Another benefit is the ease with which operators can view machine functions on the operator interface. Kreissler says that statistical information such as machine efficiency data is readily available thanks to the PLS. This coupled with the reduced wiring and hardware greatly enhances the control’s ease-of-use.“We have had good experience with Electro Cam’s service and PLS products in the past” Kreissler says. “However Electro Cam did not have a plug-in module at the time we originally required one. Once their product hit the marketplace we made the switch and are pleased.”
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