Thanks everyone for your input!, the issue was my slection of RTU driver while using a TCP device. I also have Moxa MB3180 devices in my project and they are RTU. It stuck and I setup all devices with the same RTU driver. 
Thanks everyone for your input!, the issue was my slection of RTU driver while using a TCP device. I also have Moxa MB3180 devices in my project and they are RTU. It stuck and I setup all devices with the same RTU driver.