How to use the Industrial Shields library in the Arduino IDE: (NOTE: This example also works for any other library you want to charge on the Arduino IDE).
Click on: “Clone or download”
After that download the zip file on your desktop.
2. Add the library on the Arduino IDE.
After choose the arduino-IndustrialShields-master.zip the library have to be charged. To verify if the library is added correctly you can see the library on:
//File-> Examples -> IndustrialShields
3. Now you can open an example to start to programm a PLC.
It is not necessary to use the Industrial Shields library to program the Arduino Based PLCs because of all PLCs use an Original Arduino board inside.