Category Archives: RSLogix 5000

ControlLogix – System Overhead Time Slice

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System Overhead Time Slice (SOTS)

I thought I would do a piece on the System Overhead Time Slice setting you will find in pre- L8 (5580) Allen Bradely ControlLogix and CompactLogix platform of controllers.  As the complexity and connectivity of modern automation systems get more complex requiring high-performance communications, I/O, and motion control , careful consideration must be taken to ensure that both user-defined and back-end system tasks are optimized to mitigate the likelihood of CPU starvation.

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Producer/Consumer Messaging vs. Explicit Messaging

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In this article I will explore two different methods by which a PLC programmer can pass information to-from multiple ControlLogix controllers, namely, the producer/consumer messaging model and the explicit messaging model.

Producer/Consumer and Explicit Messaging Model

While both models will effectively transmit data from one or more controllers to one or more controllers over a network, depending on the requirements of the application, a PLC programmer may be inclined to choose one model over the other.

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Creating and Downloading an RSLogix5000 project

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In this video I show you how to create a new project, compile the project and download it a controller using RSLogix5000 programming software.

A link to the complete programming manual for RSLogix5000 can be found on the Rockwell Automation website here.

Check it out here, and don’t forget to leave a comment or two and subscribe to our YouTube Channel!