Hello all

I have a project with ET200SP-F CPU and TP1200 hmi. I want to synchronize the time of the hmi with the plc. so in the hmi connection I changed the "HMI time synchronization mode" to Slave. and I used the date time field in one screen. It working fine, however, if I change the time in the PLC, the HMI takes few minutes to update it. 

for example. in the plc I have the time 10:23:26 am and that shown in the HMI, then I change it to 8:26:51 am in the plc, I see the hmi keeps the old time and after few minutes it will update to the new time. 

what Im missing here?

Regards

T_Ebrahem

Hello,

That is a normal situation.

The time is synchronised, when HMI panel starts up.

Or every 10 minuters, see the following link:

Clock synchronization between a HMI operator panel and a SIMATIC PLC

See page 7 of the Documentation.

Best regards,

Wizard