patrickjmcd / ieee754-binary16-modbus-plc

Converts a modbus WORD into a Binary16 REAL value for Micro800 PLCs

IEEE Binary16 Modbus PLC Conversion

Developed by Patrick McDonagh

Usage

This program converts an unsigned integer (UINT) data type to an IEEE-754 Binary16 (also called Float16) half-precision floating point number. Since Rockwell Automation PLC's do not have a half-precision floating point number data type, the data is stored in a REAL (32-bit) data type.

This program operates as two separate User-Defined Functions within Connected Components Workbench. In order to use the function, just import Controller.Micro820.Micro820.ReverseUINT.7z and Controller.Micro820.Micro820.WordToFloat16.7z into your project. Run the conversion on a tag of type WORD using the following:

float16_output := WordToFloat16(word_tag);

Source Code

The source code for the functions can be viewed by importing the archive files or by examining the .stf files in this repository.