Introduction
1-57SA522 Manual
C53000-G1176-C119-2
Messages and
Measured Values;
Storage of Data for
Fault Recordings
A series of operating messages provides information about conditions in the power
system and the 7SA522 itself. Measurement quantities and values that are calculated
can be displayed locally and communicated via the serial interfaces.
Messages of the 7SA522 can be indicated by a number of programmable LEDs on the
front panel, externally processed through programmable output contacts, and commu-
nicated via the serial interfaces (see “Communication” below). With the help of the
CFC graphic tool (Continous Function Chart) user-defined annunciations and logical
combinations of internal or external signals can also be generated.
Important events and changes in conditions are saved under Annunciation in the
Event Log or the Trip Log, the latter being used for faults. The instantaneous meas-
ured values during the fault are also stored in the device and are subsequently avail-
able for fault analysis.
Communication Serial interfaces are available for communications with PCs, RTUs and SCADA sys-
tems.
A 9-pin D-subminiature female connector on the front panel is used for local commu-
nications with a personal computer. DIGSI
®
4 software is required to communicate via
this port. Using the DIGSI
®
4 software, settings and configuration can be made to the
relay, Realtime operating quantities can be viewed, Waveform capture and Event Log
records can be displayed, and controls can be issued.
A DIGSI
®
4 service interface port, a system (SCADA) port and a time-sync port (IRIG-
B or DCF77) are optionally available on the rear of the device.
A rear service interface can be supplied as RS-232, RS-485, or multimode fiber optics
type ST. DIGSI
®
4 software is required to communicate via this port.
A rear system interface can be supplied as RS-232, RS-485, or multimode fiber optics
type ST for communications between the 7SA522 and a PCs, RTUs or SCADA sys-
tems Standard Protocols, IEC 60870-5-103 are available via the system port. Integra-
tion of the devices into the automation systems SINAUT
®
LSA and SICAM
®
also take
place with this profile.
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