Communications - Siemens 7SG164 Ohmega 400 Series Manual

•
Change of state of Status Inputs
•
Change of state of any protection characteristic
•
Main Trip
Other events are available depending upon the features included in the relay -they are described with the
relevant feature.
The event storage buffer holds at least 500 records. When the event buffer is full, then any new record over-
writes the oldest.
Event records are stored in RAM with a capacitor providing back-up during breaks in auxiliary supply.
The event records can only be examined once they have been downloaded into a suitable data analysis
package such as Reydisp Evolution or by interrogation of the SCADA system.

8 Communications

A front mounted RS232 port and two rear fibre optic communication ports are provided.
Communication is compatible with the IEC60870-5-103 transmission and application standards.
The fibre optic interface gives superior EMC performance. A user friendly software package
(Reydisp Evolution) is available to allow transfer of the following:
•
Relay settings
•
Waveform records
•
Event records
•
Instruments and meters
•
Control Functions
Communications operation is described in detail in the Communication Interface Manual
©2011 Siemens Protection Devices Limited
7SG164 Ohmega 400 Series Description of Operation
Chapter 1 Page 6 of 12