S7-300 SET TIME OF CPU

[kouim92kostas]

Hello...

I would like your help for settting the time for S7-300 CPU....

The set time instruction is :
CALL "SET_CLK"
PDT : =
RET_VAL:=

Lets say that I send the time from the HMI to PLC to DB10.DBW64. How i transfer it to SET_CLK? What i have to write to PDT and RET_VAL?
I have already variable of the data type DATE_AND_TIME, in which the time is stored (using the READ_CLK).

I read the manual but stil I can't understand the way it must be done! (If you want I can send screenshots if it helps)

I don't know anything about these instructions so I'm a bit confused!!

And somethimg else. In S7-200 the TODR and TODW are not working parallel... The same goes for the S7-300 too?

Thanks a lot....

[Answers to FAQs]

https://support.industry.siemens.com/cs ... t/26961516
How do you do the summer/winter time switchover with WinCC flexible (update to version V1.1)?
Use the "Set PLC Time" button to transfer the specified time to the PLC

[kouim92kostas]

Good morning.... Thanks for your reply...
But I'm not sure this is what i want to do...
The question remains.... How i transfer the time i send... To set_clk... And the parameters of this function what I write to them.?

[Answers to FAQs]

I use this FAQ in real PLC S7-300.
Press screen button and set new time of PLC