During IEC 61850 MMS communication with the IEDs (protective equipment), the station gateway acts like an IEC 61850 MMS client. The IEDs are IEC 61850 MMS servers.

All IEC 61850 tags in the IED can be addressed via the station gateway. Time stamp, value, and status of the tags are transferred depending on the configuration. The time stamp always originates from the protective equipment.

Configuration is carried out in the CFC Editor with predefined blocks from the supplied SG_LINK communications library. The blocks available for various device types are pre-configured for a standard scope of tags, but can also be adapted or expanded without problem for special project requirements.

The station gateway communicates with the SIMATIC PCS 7 automation system via its CP 443?1 communications module, and uses the standard communication mechanisms of SIMATIC PCS 7 (BSEND/BRECV).

The communication devices have integrated connection diagnostics, that signal failure, return or IEC 61850-specific connection problems in the SIMATIC PCS 7 operator system through alarms.