Support-focused enterprise controls: sensor actuation charts

Many machine designs come with a sequence of operation drawing for each station. Mechanical designers use the drawings as a way to convey design information to control system designers. Other design-related drawings show the dimensional offsets of station sensors with respect to station centerlines. Most designs are missing an understanding of how control system designers use object actuators and sensor position information to create application triggers. Mechanical designers use the sequence diagrams to show the time in seconds allotted for objects to move between or into process stations. Sequence of operations drawings typically do not show an object’s variable travel speed as it activates acceleration, deceleration, or any other in transit sensors. To document the speed transition points, designers remove the aspect of time and adopt sensor activation charts. These charts purposely convey an object’s station-specific movement information to control system designers. The bars found
http://www.controleng.com/single-article/support-focused-enterprise-controls-sensor-actuation-charts/1b695c3f47884099ff83879b11e29d0d.html

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