Zenon 11 Service Engine CPU high performance

Zenon 11 Service Engine CPU high performance

Hi
We have 02 SVR works with Zenon 11 Energy Edition redundancy . The variables are 1800, driver only 02 channel 104, logic, internal.  CPU SRV is  Intel Xeon E2-2124G @3.4GHz
But the process of Zenon engine cause more CPU percent (60%) in both 02 SVR. Could you please tell me how to check why it cause more CPU, 

Thanks and regards