Understanding / Learning S5 Logic

I am looking at a Print out and I am trying to understand what is happinging and after quite a bit of reading there is still a lot I a am lost at.




What is the UN. The M 36.0 is just Memory Bit 0 of Byte 36.

I know that the SP* is to call a different areas of code. but what is the difference between A and B in this example.

I am not sure what the Name does or the E does. DB 11 is just full of Hex Values (KH 0000 and stuff like that).

UN = AND NOT
SPB = Jump Conditionally (in this case when M36.0 = 0)
You will need to look at FB181 to see what is happening BUT it looks like it is using DB11
SPA PB1 = Jump Unconditionally to PB1

This may help.... its S7 but it has some breakdown's of STL

On the Siemens training site go to App. III on the bottom of this page, like I said its S7 but it may help http://www.automation.siemens.com/fe...own_module.htm