Technical data

TeleService V6.1 Service Software for SIMATIC S7 and C7
A5E00921336-01
9-1
9 Data Communication between Remote
Plants (AS-AS Remote Connection)
9.1 Overview of AS-AS Remote Link
The AS-AS (PLC) remote link allows two S7 automation systems to exchange
process data via the phone network. The S7 automation system from which the
initiative for establishing and disconnecting the remote link is designated as the
local one below. The automation system to which the remote link is to be
established is designated as the remote one.
The data exchange is carried out with the communication SFCs for non-configured
S7 connections.
• SFC 65 "X_SEND",
• SFC 66 "X_RCV" ,
• SFC 67 "X_GET" and
• SFC 68 "X_PUT".
These SFCs are also called communication SFCs in this document.