ACS supports the Inter-control Center Communications Protocol (ICCP per IEC60870-6 TASE.2) standard for Master-to-Master system communications.
ICCP communication is based on the client/server model. A control center system makes a data request of another control center system, resulting in a data transfer. Control centers may be both clients and servers. The physical interface for the ICCP connection may use any transport and network services that fit the OSI model. TCP/IP over Ethernet is the most common transport method used. ICCP may operate over a single point-to-point link or may include multiple control centers connected to a wide area network. The logical connections (known as “associations”) between the control centers are general in nature. Clients may establish associations with multiple servers simultaneously, and may also establish multiple associations with the same server. The associations can be established with different priority levels for the transferred data.
ICCP uses “Bilateral Tables” to control access. The Bilateral Table represents the “agreement” between two control centers that are connected with ICCP. It identifies the data elements and objects that can be accessed via the link and the level of access permitted.
The ACS ICCP Configuration GUI is an Integrated Editor Environment (IEE) application that enables the configuration of the ICCP objects. Several Local Control Centers can be created and for each the user can set up the Data Values, Devices and Information Messages.
ACS ICCP Server Features:
- PRISM status point showing status of each association
- PRISM pseudo point allowing user to temporarily disable a given association
- Secure ICCP is supported
- Status GUI shows a live view of incoming and outgoing values and flags
- Conformance Blocks 1, 2 and 5 supported