a physical connection or layer, which is the wiring and connection components, and.Finally, PLCs often communicate to server level PCs running various manufacturing related applications.Īll of these communications require two things: Communication with some type of operator interface device is also often required, as is Internet connectivity. Next, are other PLCs and control devices, such as motor drives and servo controllers. First, there are devices which are part and parcel of the PLC, such as remote I/O. PLCs need to communicate to a number of different devices. Industrial needs and technological advances have kept PLC communications evolving, and this post will explore some past and present communication standards, and what the future may hold. PLC communications has grown and changed over the many years since the controller’s inception decades ago.
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