Yerger noted that the Instruction List textual PLC programming language is “a very low-level, mnemonic-based language” whose days look to be numbered. Instruction List has been “deprecated in IEC ...

Software also lets users implement one version of a control project and target it ... submillisecond scan times and intuitive flow chart programming.

It can also perform arithmetic and other functions, such as servo control and analog measurement. Traditional PLC programming resembles a relay ... for having written many modules besides the initial ...

On the surface, a programmable logic controller (PLC) might seem like nothing more ... under these specifications will be recognizable to control engineers and maintenance personnel worldwide.