PLC experience is valuable, always work safely in an industrial environment if that's where you will be-a lot of the guys who switch from installations to maintenance come in with a need for training on proper use of PPE(personal protective equipment). Pay attention to how they administer their safety program, this will tell you something about the value that they put on the employee. SCR drives are standard on almost any piece of manufacturing as are PLC's. Plant lighting systems and energy management systems are important to understand. The ability to effectively communicate with the internal customer is extremely important, if you jerk their chain to often your life as a maintenance guy can be miserable, there is a difference between who runs the plant and who fixes it-get to know the pecking order. Overcurrent protection knowledge is important, many machines have had just any fuse replaced over the years because it fit rather than replacing with the right one for the application. It can be a very interesting job with the right employeer. Good luck.
