Use the HMI Control Panel -> Time & Date -> Set the time settings according to the target location, and be sure the check the box for daylight savings time currently in effect. 

kAne9173

I am using S7-1500 CPU and TP-1000F HMI. I set up PLC and HMI Time Sync using Area Pointer Date/time PLC.I setup Daylight saving in CPU Properties. 

HMI Display Correct Time (Using Date/Time Field to see Time). 

I notice alarm time is off by 1 hour. 

Hello kAne9173

There are different versions of Time synchronisation available.

Basically you can see anything in here:

https://support.industry.siemens.com/cs/ww/en/view/69864408

https://support.industry.siemens.com/cs/de/en/view/109482675

--> If you use the Area Pointer (the "old" way) Date/Time PLC then the time the panel reads from the DB is used a local time. this is important to know because the most time synchs like NTP or SIMATIC Time Synchronisation uses the UTC or Systemtime.

So the problem comes if you use PLC timestamps like in Program_alarm or if you use systemdiagnostic view with diag buffer entries. THen the UTC/Systemtime timestamp will be used and the HMI has to be set exactly like the PLC (timezone and summertime)

So the best way with S71500 and Comfort Panel or Mobile Panel is to use the two FAQs above. then the Time is correct in any situations. Of course there are also usecases in where the Area Pointer is still good to use but then you will always have to make compromises in any way if you use S71200/1500. With S7300/400 the Area Pointer is still the way to go.

Bye Murof

Warnstromkraft

Hello!

Isn't there any solution for the Basic HMI to account for daylight saving time?

BR Andreas

 hello Andreas

 you can use the manual time shift in the settings of the Panel every time the daylight saving time switches or you use the area pointer  Date/Time PLC with the local time.

Then in case of Basic PAnels the only problem is the timestamps in the diagnostic buffer view in the systemdiagnose control. But Everythning else should work automatically

Bye Murof

Hello Warnstrom

Basic panels cannot use Program_alarm,. only descrete Alarms (bit triggered)

This alarms uses timestamps of the HMI, so the timestamps of the bit triggered alarms are equal with the local time of the HMI. This should be OK.

Only timestamps that comes from PLC would not be correct in summer months in this constellation.

Bye Murof