How can you choose the right programming language for your DCS project?

1 Know your requirements

Before you start looking for a programming language, you need to have a clear idea of what you want to achieve with your DCS project. What are the main objectives, specifications, and constraints of your system? What are the expected inputs, outputs, and processes? How complex and dynamic is your system? How much flexibility and modularity do you need? How will you test, debug, and maintain your system? Answering these questions will help you narrow down your options and focus on the languages that suit your needs.

2 Compare the languages

Once you have defined your requirements, you can compare the different programming languages that are available for your DCS project. Some of the most common languages are ladder logic, function block diagram, structured text, instruction list, and sequential function chart. These languages are based on the IEC 61131-3 standard, which defines a common framework for DCS programming. However, each language has its own syntax, semantics, and features, which affect the readability, efficiency, and performance of your code. For example, ladder logic is easy to use and understand, but it may not be suitable for complex calculations or data structures. On the other hand, structured text is more versatile and powerful, but it may require more programming skills and experience.

3 Consider the standards

Another factor that you should consider when choosing a programming language for your DCS project is the industry standards. Depending on the sector and application of your system, you may have to follow certain guidelines, regulations, or best practices that specify the preferred or mandatory languages for DCS programming. For example, if you are working on a safety-critical system, you may have to use a language that is certified by the IEC 61508 standard, which ensures the functional safety of electrical, electronic, and programmable electronic systems. Similarly, if you are working on a process control system, you may have to use a language that is compliant with the ISA-88 standard, which defines the models and terminology for batch control.

4 Check the compatibility

Another aspect that you should check when choosing a programming language for your DCS project is the compatibility with the hardware and software platforms that you are using or planning to use. Different DCS vendors may offer different programming tools, libraries, and interfaces that support or require certain languages. For example, some vendors may provide graphical editors or integrated development environments (IDEs) that make it easier to program in ladder logic or function block diagram. Others may offer code generators or translators that allow you to convert your code from one language to another. Therefore, you should research the features and limitations of the platforms that you are working with or considering, and choose a language that is compatible and interoperable with them.

5 Evaluate the resources

The final tip that we will give you when choosing a programming language for your DCS project is to evaluate the resources that you have or need. This includes the human, financial, and technical resources that are involved in the development, implementation, and maintenance of your system. How many programmers do you have or need? What are their skills and qualifications? How much time and money do you have or need? What are the training and support options that are available? How easy or difficult is it to find, hire, or outsource programmers who are proficient in the language that you choose? These questions will help you assess the feasibility and sustainability of your choice, and avoid potential problems or delays in the future.

6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?