These are topics from where most of the questions are asked if you apply for PLC SCADA DCS jobs.
If you are a fresher then Normal PLC questions you would be asked:
- Like which are the family of PLC’s you have worked on or you know about. Most of the industries use Rockwell and siemens PLC’s
- What kind of PLC programs you can work on - like ladder or structural text or functional blocks (FB’s)
If you are a bit experienced these questions will be asked:
- Recent projects where you have configured PLC’s
- How did you set up the communication? which communication interface did you use?
- PLC to PLC communication basics
- PLC to server communication basics
- Data concentrators logic
- Interviewer may ask you to write a small logic program for a scenario
Mostly PLC communication is one topic where you would be asked more questions as that is one challenging area
SCADA questions mostly will be
- which scada you had worked on
- What kind of Scada, bottling industry or automotive industry
- Which PLC you have communicated for designing your SCADA
- PLC - SCADA communication setuP
SIMILAR QUESTIONS FOR DCS:
- which DCS and for which industry did you setup DCS?
- What communication protocol did you use
- How you validated the data
Apart from that questions will be on:
- communication protocols
- TCP/IP communication
- Ethernet IP (this one is rockwells)
- Profinet (siemens)
- Profibus
- Modbus communication