Stephen Reilly, ProSys
ProSys would like to share with you, our clients and fellow controls engineering colleagues, updates on the latest version of the IEC 61131-3 control programming standard, which provides languages for programmable logic controllers (PLCs), programmable automation controllers (PACs), distributed control systems (DCSs), and industrial PCs (IPCs) objects. These languages include traditional relay ladder logic (LD), structured text (ST), and sequential function chart (SFC). The standard’s hierarchical design techniques make plant controls easy to design, making it very useful for plant maintenance. We hope you find it informative and worthwhile, and if there are any questions about it, feel free to contact us today to learn more!