PLC

We are proficient in Ladder, Function Block, Structured Text, and Sequential Function Chart styles of PLC programming.

Case Study:

Designed a complex system for inspecting rulers. A Mitsubishi PLC controlled the process using a Sequential Function Chart. Inside each step was a block of Ladder, Function Block, or Structured Text logic. Multiple processes were managed simultaneously. The PLC stored and transferred a library of recipes for each of over 100 part numbers. Data for each product was processed internally or sent to cameras, a robot, and servo motors so the machine could adapt to the entire product line. A background process controlled the state of the machine, facilitating interactions with machine operators. This allowed such things as a Hold, which made it easy to pause the machine at any time and safely disable multi-equipment before releasing door interlocks to allow entry. A safety PLC monitored doors in a category 4 setup.