According to the IEC 61131-3 standard, there is a difference between a function and a function block in PLC programming. The main difference involves internal memory. So for instance, a function can ...

One of the most powerful capabilities of programmable logic controllers (PLCs) that conform to the IEC 61131-3 standard is the functionality that allows application engineers to create function blocks ...

The use of function blocks is one of the most important concepts formalised by the IEC 1131-3 standard. Using function blocks in the design of control software has many benefits including improving ...

As discussed in chapters 1 and 2, a fundamental property of IEC 61499 function block networks is that the execution of all software within every function block is, in some way, event triggered. In ...

The PLCopen Motion Control Specification harmonizes the access of motion-control functionality across platforms, explains Eelco van der Wal, managing director of PLCopen (www.plcopen.org), Zaltbommel, ...

This file type includes high resolution graphics and schematics when applicable. When designing a control system, where the safety system is to be networked, where would you start? To understand the ...