The Raspberry PI and Arduino boards are very well-known devices for fast electroforming and home DIY applications, but their functionality and flexibility in industrial environments remains to be determined to a large extent.
Raspberry PI and Arduino bring many benefits to the industry with the flexibility of programming, customizable signal types and ease of adaptation to existing equipment.
For example, they can be an alternative to common industrial equipment, low cost and flexible, adding remote control and monitoring capabilities to small traditional industrial systems.
The three most common problems with the use of such development boards in industrial environments:
§ Robustness issues in industrial environments
§ safe question
§ Industry Standard Information Protocol Issues
Robustness in industrial environments
There are already several Arduino and Raspberry PI hardened versions available on the market.
Hardware such as Industrial Shields' Arduino-based PLCs and Raspberry-based tablets have included additional robustness to meet industrial needs.
In addition, a variety of different industry standard housings have been specifically developed to accommodate both boards.
safe question
“Is hardware based on Raspberry and Arduino boards a security solution for industrial applications?†This is probably the most controversial topic on the Internet. There is no simple answer to this question, it depends on many factors.
The safety of industrial applications depends not only on the PLC, but also on the integrity of the entire project, how the system and software are implemented, and how safety is considered in project design.
This is an interesting debate between engineers who look at security issues from different perspectives.
Case Study – Fortaps uses Industrial Shields Arduino-based PLCs to automate the plant.
Industry standard communication protocol problem
This is the flexibility of the Arduino and Raspberry PI. Based on the Modbus protocol, a specific library is developed to enable communication between the two boards via their protocols.
Modbus is a serial communication protocol developed by Modicon (acquired by Schneider Electric) for its programmable logic controller (PLC); now the most common communication protocol for many automation vendors such as Omron, Opto 22, Schneider And Mitsubishi.
The main reasons why Modbus is widely used in industrial environments:
§ Development for industrial applications
§ Free public publication
§ Easy to use, install and maintain
§ Very few restrictions on suppliers
Modbus allows multiple different devices to connect to the same network for communication, no matter what OEMs (prototype device manufacturers). The need to communicate between different devices from different vendors became more important than the arrival of the fourth industrial revolution; Industry 4.0 and Industrial IoT gave Modbus a second life.
Here's how to remotely control the HAVC (Heating Ventilation and Air Conditioning) system based on Arduino hardware and SCADA.
SCADA (Monitoring and Data Acquisition) is another industrial system that operates remotely on signals encoded on a communication channel that typically uses one channel at each remote station. Arduino's SCADA library is also publicly available.
Remote control of HVAC system by Arduino-based PLC
in conclusion
As long as the project is specifically designed to ensure safety, the ruggedized version of the Arduino and Raspberry PI can be a valuable and reliable alternative to mature industrial equipment (especially small traditional industrial systems connected to the network).
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