Hello. You have to use the SN Element to send Flags to your Net Devices. On the device itself, you write a problem which uses RN ( Receive Net Bit), and then what the Device should with the Data.
For sending / receiving Values itself, you have to use PT on the device which sends the value, and GT on the device which gets the value.
E.g.: Net ID 2 sends it's analogue Value :
PT01 with QA as I1 Parameter
Net ID 1 wants to receive :
GT01 with the Net ID 2 and PT 1 as paramters. On QV you then set where you want to store the Value, e.g. and Word ( MW ).
Hope it helps
Greets,
Nico Blanke