Reason

The time of HMI will be synchronized into the set time zone in V-net.

The internal time of HMI

It is related to the time zone set in the background, which will affect the time of data record, alarm and other time-related objects or functions on the HMI.

The time of V-net

The time zone on V-net will affect the data record or alarm time on V-net. So if there are two different set time zone in HMI and V-net,  the time of data record will be different.

In general, V-net time and HMI time do not affect each other and they take effect on the corresponding terminal. However, if the time of HMI is modified in HMI, the time will be synchronized into the set time zone in V-net.