Which PLC models have we used?

• A. Schneider Electric and ABB
• B. Allen-Bradley and Siemens
• C. Mitsubishi and Honeywell
• D. Siemens and Mitsubishi

Answer: (B)

The question tests which PLC brands our labs and hands-on work have used. In this course, we work with two major PLC ecosystems that are widely taught and encountered in industry. Allen-Bradley (Rockwell Automation) and Siemens cover those dominant families. Being exposed to Allen-Bradley’s ControlLogix/CompactLogix line with Studio 5000 (and RSLogix histories) alongside Siemens’ SIMATIC S7 ranges with STEP 7/TIA Portal gives you experience with different programming styles, data handling, and networking approaches (Ethernet/IP on the Allen-Bradley side and PROFINET/PROFIBUS on the Siemens side). That combination is why the correct answer is Allen-Bradley and Siemens.

The other pairings represent brands that appear in various curricula or regional programs, but they aren’t the ones emphasized in our labs. Schneider Electric with ABB, or Mitsubishi with Honeywell, or Siemens paired with Mitsubishi, would involve different software ecosystems and hardware toolchains that we haven’t focused on in this course.