Q PLC maintenance

Main objectives

Q PLC Maintenance is a very hands-on practical based course split into two modules (hardware & software). The course concentrates on wiring and connectivity, with a strong emphasis on both hardware and software fault finding diagnostics. Software used will either be GX Developer, GX IEC Developer or GX Works2


Delegates need no previous experience with Mitsubishi PLCs or PLC programming. Some knowledge of other manufacturers’ PLC products is an advantage but not essential. An understanding of basic electrical principles would be an advantage.

Products used

This course uses dedicated Q PLC simulator system hardware together with PLC programming software. Delegates are asked to bring digital multi-meters if possible.


1 Day


  • A brief history of PLC systems
  • A comparison of PLC and relay systems
  • Hardware connectivity & wiring
  • Analogue connectivity
  • Hardware fault finding
  • Program verification, fault finding and monitoring
  • Transferring a simple application program

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