Initial Value in DB (Siemens)

S7PP · Jun 7, 2011

Hi guys, it might be a simple question for you but confused for me now.

In Step 7, I set an initial value in DB, for example I set DB3.DBW20 = 10, when I download DB3, and use DB3.DBW20, does it suppose to quale to 10?

Why I got a "0" all the time? I tried to download the whole project and the PLC restarted, but it's still "0".

Thanks

moggie · Jun 7, 2011

S7PP said:
Hi guys, it might be a simple question for you but confused for me now.

In Step 7, I set an initial value in DB, for example I set DB3.DBW20 = 10, when I download DB3, and use DB3.DBW20, does it suppose to quale to 10?

Why I got a "0" all the time? I tried to download the whole project and the PLC restarted, but it's still "0".

Thanks

In Step 7 Manager open your DB then look at -

Initialize Data Block Command (Edit Menu)

This menu command reinitializes the data block displayed in the active window, meaning the actual value of each data element is overwritten with the initial value.
If this menu command is unavailable (grayed out), select the View > Data View menu command.

S7PP · Jun 10, 2011

Thanks a lot for your reply. Very helpful.

Initial Value in DB (Siemens)

S7PP

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moggie

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S7PP

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