Siemens SIPROTEC 4 7VK61 Manual page 21

During a fault (system fault) important events and changes in conditions are saved in fault logs. Instantaneous
fault values are also saved in the device and may be analyzed at a later time.
Communication
Serial interfaces are available for the communication with operating, control and memory systems.
A 9-pin DSUB socket on the front panel is used for local communication with a personal computer. By means
of the SIPROTEC 4 operating software DIGSI, all operational and evaluation tasks can be executed via this oper-
ator interface, such as specifying and modifying configuration parameters and settings, configuring userspe-
cific logic functions, retrieving operational and fault messages and measured values, reading out and
displaying fault recordings, inquiring device conditions and measured values, issuing control commands.
To establish an extensive communication with other digital operating, control and memory components the
device may be provided with further interfaces depending on the order variant.
The service interface can be operated via the RS232 or RS485 interface and also allows communication via
modem. For this reason, remote operation is possible via PC and the DIGSI operating software, e.g. to operate
several devices via a central PC.
The system interface is used for central communication between the device and a control center. It can be
operated through the RS232, the RS485 or the FO port. Several standardized protocols are available for data
transmission. An EN 100 module allows integrating the devices into 100 MBit Ethernet communication
networks of the process control and automation system, using IEC 61850 protocols. In parallel to the link with
the process control and automation system, this interface can also handle DIGSI communication and inter-
relay communication using GOOSE messaging.
Another interface is provided for the time synchronization of the internal clock via external synchronization
sources (IRIG-B or DCF77).
SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
Introduction
1.2 Application Scope
21