Initial value of DB not loaded

Hello, 

I'm working with step 7 v5.5 sp4 and PLCSIM for simulation.

I created a DB and I define the first word with value 20 as initial value. 

My problem was when I load my program (using PLCSIM)and go online, I find that the first word of DB was 0 (as you see in attachement) and this value don't change until I force it using VAT.

So, why I can't see initial value (20) after loading DB?

Hati

The DB has two columns for values, Initial values and Actual value. Actual value is what you see in online view. Change the actual value of the DB before you load it to the PLC. If you don't see Actual value column, you can change the view of the editor to see it (View -> Data view). The normal view is Declaration view, when you open a DB, and you only see Initial value column.

 Thank you very much Hati,

but what is the utility of initial value ? and what can I do if I need to have this value (20) after loading program and run the cpu?

Hati

One could say that Initial value is a "backup". When something goes wrong, and an initialization is made by the PLC, it reads the Initial values, instead of actual values.

 Thank you Hati it's clear now.

So if I need to load this value when running CPU I have to display data view on this DB.

Med_selmi

...and what can I do if I need to have this value (20) after loading program and run the cpu? 

 ??