Each input or output instruction is assigned an address (shown below the instructions in Fig. 1, on page 22) indicating the location in the PLC memory where the state of that instruction is stored.

THE use of function blocks for programming of programmable logic controllers (PLCs) is gaining wider acceptance. Rather than the classic “contact and coil” representation of ladder diagram or relay ...

PLC programming is evolving with AI-assisted coding, low-code platforms and IT-OT convergence. Industry experts from Emerson and Siemens share insights on how this change impacts the workforce, the ...