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Raspberry Pi Serial Port Programming
Node-RED will be used on the Raspberry Pi 4 to communicate Modbus RTU to a Solo process temperature controller and Click PLC using twisted pair RS485. This will be done on the same serial network so the devices will be daisy chained together on the two wires.
We will be reading the PV (present value) and SV (set value) of the Solo temperature controller and then writing these values into the Click PLC. A SV value will then be read from the Click PLC and if it has changed, the value will be written to the SV of the Solo controller. Let’s get started.
More information can be obtained at our website. This includes all of the links mentioned in this video.
https://accautomation.ca/raspberry-pi-serial-port-programming/
There are several reasons why we are using Node-RED. Here are just a few.
- Built on top of the most dependable programming language JavaScript.
- JavaScript is flexible and easy to work with on web browsers, server-side, IoT, IIoT projects, and more.
- Visual flow type interface making programming easy.
- Node will allow JavaScript code to run directly on a computer.
- Node-RED is a free, open-source logic engine.
- Connect to PLC, PAC, Temperature Controllers, Process Controllers using standard protocols.
- Save and read from databases
- Easily make the Internet of Things (IoT, IIoT) industrial solutions.
Node-RED provides the ability for you to quickly create custom control solutions.
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