PLC Universal Hardware in the Loop System Based on ATmega2560

One of the most common way to verify end-product acting is testing. Some of the tests can be used to acquire practical skills especially tests based on the Hardware in the Loop (HiL). Such a technical possibilities can largely replace big and expensive laboratories and workplaces. The paper first describes testing techniques in different state of product development where most focus is paid to the HiL. Then the universal low cost HiL device for PLC system is designed and described based on ATmega2560. The proposed and implemented HiL can be used as in PLC program for the new plant development so in education processes.