Fault-finding is the reputation
Anyone can follow a working machine. Being handed a stopped one, with production
waiting and nobody sure what happened, is the job.
The engineers who are valued are not the ones who write the most elegant logic.
They are the ones who work through it methodically — check the input, check the
output, check the interlock, read the ladder — instead of guessing. That method
is teachable and it is what interviews probe.
Safety is not paperwork here
Software can be stopped, bypassed during commissioning, or edited by somebody
under pressure.
A hardwired emergency stop that drops the contactor works when the PLC does not.
Automation is a field where cutting a corner eventually hurts a person rather
than a deadline, and engineers who take that seriously are the ones given
responsibility.
Write logic for the person at 2am
Your ladder will be opened by a maintenance technician during a breakdown, at
night, with the line down.
Unlabelled tags, clever nesting and undocumented rungs cost them an hour they do
not have. In this field readability is a safety property rather than a style
preference, and it is a real part of how colleagues judge you.
Integrator or plant
Two different careers with the same title.
A system integrator gives you variety, faster learning and a lot of travel. An
in-house plant role gives you depth on specific machines, stable hours and less
range. Most people start with an integrator because it compresses experience, and
move in-house later when the travel stops appealing.