Hi,

check this link . It is having software clock. Otherwise you can set your PLC time by using the SFc 64 and sfc 0 sfc1

check the following link please.

in brief, use SFC1(Read system clock) block in your program, and assign a pointer address to the CDT of the block as shown in the attachment. In wincc create a tag with the same address and assign it to the date and i/o field instaed of the system time. Also in the connections tab, in the area pointer select/enable the date and time field and assign the same tag, this is to synchronise your PLC date&time in the trends and alrams. Hope this helps

according toshazinsolution , he given for plc and hmi side . try to refer photo copy in hmi side.