V1.1 or V1.2 of C7-621 6ES7621-1AD02-0AE3?

[e5frog 0]

First time in STEP7, was going to set up the system. 
I got stuck with the C7-621, there's two versions of the 6ES7621-1AD02-0AE3 that I have and I have no idea if it's V1.1 or V1.2. 

Do You know if it makes a difference which one I choose or how I find out which one I have?

[sigmadelta 3]

V1.1 and V1.2 are firmware (operating system) versions of the C7-621.

If you have the unit, you can see the firmware version online.  If you don't have it, and don't know the firmware version, choose V1.1.  You can always replace it with V1.2 later if you find out it is V1.2.

[sigmadelta 3]

If you have the unit and want to find out what version it is, open Accessible Notes (3rd icon from the left in SIMATIC Manager), then right click the node that shows up (typically node = 2) and choose PLC -> Module Information

[e5frog 0]

Thanks. 
Bought a USB interface for the C7-621 but I can't connect to get to the "Accessible Nodes" - or anything really "288:91 With the interface configuration, communication in STEP7 is not possible."

I'll post a new thread about it.