OpenHAB is a open source software for integrating different home automation systems and technologies into one platform.
Fatek PLC is one kind of Programmable Logic Controller produced by FATEK Automation Corporation.
You can easily integrated Fatek PLC with computer, tablet and smartphone using OpenHAB.
Thanks to OpenHAB plugins it is possible to extend this to support Fatek PLC with native communication protocol.
To communication with PLC OpenHAB bindings use JFatek library.
In order to get support you can ask question on OpenHAB community forum
You can also create issue on github if you found some error or need new feature.