I--- Qelectrotech Siemens Library - -

The IEC 61804 library was developed by the International Electrotechnical Commission (IEC) as part of its efforts to standardize communication protocols for industrial automation and process control. The library is based on the IEC 61131-3 standard, which defines the programming languages and data types for programmable logic controllers (PLCs). The IEC 61804 library provides a set of standardized function blocks and data types that enable devices and systems from different manufacturers to communicate with each other seamlessly.