A look at how a PLC operates illustrates the similarities. For example, to turn on an LED, any PLC needs three components: the program logic, the memory map, and the I/O scan.

However, SFC as defined in the IEC-1131 standard is not intended to be a complete programming language. Rather, it is a way of organizing the sequential activity of ladder logic programs.

David Greenfield: Welcome to the Automation World Gets Your Questions Answered podcast, where we connect with industry experts to get the answers you need about industrial automation technologies. And ...

FlexProfile: For a host of applications ranging from form, filling and sealing to carton erection and palletizing, Rexroth FlexProfile on the MLC Version 13 offers the ability to create highly ...

TI’s new programmable logic offerings, however, can combine up to 40 combinational and sequential logic elements along with analog functions into a single device (Fig. 1). 1.