Today’s topic derives from a project I have become involved in in my “spare” time. Lately I have been spending a lot more time teaching classes. My project in Miami is mostly complete, so I have been able to get …

Fieldservers and Protocol Converters Read more »

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When designing a control system, sometimes it becomes necessary or advantageous to communicate with devices that were not made by the PLC manufacturer. If these devices need to be placed on an Ethernet, DeviceNet or Profibus network there are methods …

Non-Native Devices: .eds and .gsd files Read more »

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Today’s topic involves a project I have been working on over the last few months. The project consists of adding process equipment including tanks, pumps, valves and instrumentation to an existing system… while it is running. Because production runs 24 …

Ladder Logic 303: PLC Forensics Read more »

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Today’s post is in response to Amit’s question on a previous topic about leak testers. He asks “What is the process to send or receive data from a Cosmo leak unit tester?” Rather than address Cosmo specifically, I decided to …

Serial Device Communications Read more »

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As part of my job I have often been tasked with gathering information pertaining to machine or production line performance, production data or implementation of SCADA systems. Most of the time my job ends at the plant floor and others …

Manufacturing Execution Systems (MES) Read more »

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