Hi Guessmi,
ABB sell a camera together with software for configuring and training the camera in RobotStudio. It makes it much easier to get started with the camera since we tailored the user interface around robot-camera integration. You don’t need to be distracted by all other ways of connecting the camera using Ethernet/IP, Modbus TCP, etc, etc.
Just define which image properties you would like to receive into your RAPID program.
It is based on the InSight technology.
Just wanted you to know that 
If you already decided to use a stand alone InSight and integrate it yourself, we are happy to help you with that also.
In the user documentation of the Cognex software InSight Explorer, there is a code example in RAPID, that uses a TCP/IP socket to connect to the robot.
I don’t have that manual in front of me now, but I know there is such a chapter.
Maybe you can start from there?