I have concerns, about Designers of Electrical installations, especially as far as Industrial Controls go.
Recently, I was asked to install an automatic inking system at the local meat works, for all of their Inedible waste.
I figured that it could all have been done with 2 timers and a Contactor, but no,
what turns up, from this guy is a PLC, a multitude of sensors, limit switches and a whole host of Em/Stop stations.
It's OK, if you don't have to install all of this, but the real crunch came when the PLC was faulty, and then later on the program had a few "glitches" in it.
All I thought, was why put our client through all of this, it took ages to fix it all up, WHY!.
2 timers and a Contactor.