Article by Senior Controls Engineer Alex Kennedy, originally published in Control Engineering.
PLC programs should be organized in a way that makes sense, such as by separating out each of the devices and using a structure that can be reused and easily understood.
A good programmable logic controller (PLC) programmer should always keep the end user in mind and write code that is understandable and reusable. Using efficient methods and practices makes life easier for the programmer as well as the client.
Every programmer should know these seven tips to make full use of the PLC and control system:
- Implement modular systems
- Structure the code as specified by the client
- The “right” language is not always the “best” language
- Understand data processing needs
- Make sure the code is well commented
- Standardize fault messages
- Match the software environment to the PLC brand
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