Hello everyone, we are currently in the process of hiring a controls technician either later this year or early next year, and I could use some assistance. Our systems include Siemens, AB, and Omron PLCs. While I am knowledgeable in electrical controls, Allen Bradley, and some aspects of Omron PLC programming, I am a beginner when it comes to Siemens PLCs. What are some key questions to ask a candidate during an interview regarding Siemens PLCs? I am creating a written test and would like to include questions that assess their knowledge in this area. Your input is greatly appreciated. Thank you, James.
Are you utilizing TIA Portal or Legacy Step 7 for your Siemens PLC models such as 1200, 1500, 300, or 400 series? Do you work with Profibus or Profinet protocols? What technical tasks does this technician handle, including troubleshooting, programming from the ground up, and networking implementations?
I have expertise in electrical controls, Allen Bradley, and Omron PLC programming, but I'm a beginner when it comes to Siemens PLCs. I'm unsure of what questions to ask about Siemens PLCs. Feel free to share your AB and Omron questions here, and our community members who are knowledgeable about Siemens can provide the relevant buzzwords.
Hello Ken, I wanted to update you on our current inventory levels: we have 1200, 1500, and 300 units available. In terms of networking, we have capabilities for ethernet, profinet, and profibus. We are now starting to explore the Siemens components in our plant. Thank you for your responses. - James
Although I didn't write it down, the most effective method I found for testing someone's knowledge of machines was to deliberately make the machine malfunction by moving a switch, disconnecting a wire, or toggling a bit, and then ask them to troubleshoot it. By observing their approach and problem-solving skills for just 10 minutes, you can quickly assess their level of expertise and familiarity with machines. This hands-on test can reveal a lot about someone's capabilities in a short amount of time.
Thank you for your responses. We are currently considering purchasing a training setup. - James
Hi James, when it comes to Siemens PLCs, you'll want to ask about their understanding of Logical Programming languages like Instruction List (IL), Ladder Diagram (LD), Function Block Diagram (FBD), and Structured Text (ST) since these are commonly used with Siemens PLCs. You could ask how they would go about debugging specific issues, how they usually approach system integration, and how comfortable they're with STEP 7 Software which is an essential part of Siemens PLC programming. Also, I would advise inquiring about their experiences with SCADA systems as Siemens PLCs are often integrated with these types of communication networks. A practical, scenario-based question could help assess their problem-solving abilities using Siemens PLCs. Good luck with the hiring process!
Hi James, when interviewing for a controls technician who specializes in Siemens PLCs, it's essential to assess their practical and theoretical knowledge. You might want to ask about their experience with troubleshooting and maintaining Siemens PLCs in an industrial environment. Questions could include, "Can you describe a technical problem you encountered with a Siemens PLC and how you resolved it?" or "How would you establish communication between a Siemens PLC and other automation devices?" You might also want to test their familiarity with Siemens-specific software like SIMATIC STEP 7 and TIA Portal. A question like, "Can you guide me through the steps of setting up PLC tags and configuring variables in TIA Portal?" could be revealing. Don't forget to assess their understanding of PLC logic, perhaps by asking them to write a simple code snippet or interpret a short piece of code.
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Answer: - During an interview, you can ask the candidate to explain their experience working with Siemens PLCs, including specific projects they have completed or challenges they have overcome. 2. What topics should be included in a written test to assess a candidate's knowledge of Siemens PLCs? - The written test can include questions on Siemens PLC programming languages, troubleshooting techniques for Siemens PLC systems, and familiarity with Siemens TIA Portal software.
Answer: - Candidates can demonstrate proficiency by providing examples of Siemens PLC programming they have done, discussing their knowledge of Siemens hardware components, and explaining how they approach debugging and maintaining Siemens PLC systems.
Answer: - Avoid focusing solely on theoretical knowledge; ensure the questions also assess practical experience. Additionally, consider including scenario-based questions to gauge problem-solving skills in real-world situations.
Answer: - While experience with Siemens PLCs is crucial for the role, candidates with a strong foundation in PLC programming principles can potentially adapt their skills to Siemens systems. Prioritize assessing the candidate's ability to learn and adapt to new technologies during the interview process.
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