time synchronization between KTP600 PN and S7-315-2PN/DP

I'm strugling with time synchronization between S7315-2PN/DP and KTP600.

I've read meny of FAQs on similar topic, but I couldn't manage to get it work.

I created a DB with local_READ, system_READ and system_WRITE variables, I called the LOC_TIME, RD_SYS_T and WR_SYS_T functions but I got ERROR return value for LOC_TIME function, with a value of -32623. It seams my CPU doesn't have a valid time status...Why?

I configured hmi screens in which I'm showing mentioned DB variables and the button for activating system time change. The system time change is working correctly and the system_READ variable is updated regularly.

What I'm missing is the change of system time of KTP600. I configured the area pointer DateTimePLC and connected it to system_READ variable (since local_READ is haveing an error, as described), but the system time of the KTP600 is set to a correct time only at the early beggining after the power up and as soon as the connection to the CPU is established, the value of KTP600 system time is changed back to 1/1/2004... As an addition, after some time I tried with creating additional 4 bytes space in order to have a match in data length of the area pointer and the DB structure, but it didn't improve nor solve the situation.

So, does anyone have a suggestion what I did wrong? Are these two problems (LOC_TIME error and KTP600 system time change) related?

Many thanks.

thank you for your reply.

When I log to the contreller, it shows correct date and time both in Online&Diagnostic>>Set time of day and in my DB for time synchronization. The same value is shown even on the KTP600 in an I/O field. But, this value is not written to the system time of the KTP600, so I still have the value 1/1/2004.

The actual HW and SW are the same in the project and reality.

I'm not sure about how to check this symbolic or s7-300/400 compatible property of my time synchro DB? It is global DB, and when I try to configure the area pointer DateTimePLC, the access type turnes allways to <absolute address>. Please check the connection window of the hmi configuration attached here.

To me it seems like something is preventing the KTP600 from sinchronizing the clocks. What I noticed is that this system time of KTP600 is showing the correct time only for a moment after project download, until the connection to the plc is established. As soon as the message about the established connection is shown, the system time of KTP600 is set to 1/1/2004.

Regards

The system time that is showed immediately after the project download is not the correct time... it shows <7/13/2004 + sometime>. After the connection is established, it shows <1/1/2004 + time>

thank you

The solution for my problem was in installing the newest update for TIA Portal V11. All the configuration were correct, but I needed just to update TIA.

Thank you for support.