Siemens SIPROTEC 4 Manual page 23

During a fault (system fault) important events and changes in conditions are saved in fault protocols (Event
Log or Trip Log). Instantaneous fault values are also saved in the device and may be analyzed subsequently.
Communication
The following interfaces are available for communication with external operating, control and memory
systems.
The USB DIGSI interface on the front cover serves for local communication with a PC. By means of the
SIPROTEC 4 operating software DIGSI, all operational and evaluation tasks can be executed via this operator
interface, such as specifying and modifying configuration parameters and settings, configuring user-specific
logic functions, retrieving operational messages and measured values, inquiring device conditions and meas-
ured values, issuing control commands.
Depending on the ordered variant, additional interfaces are located at the bottom of the device. They serve for
establishing extensive communication with other digital operating, control and memory components:
Port A serves for DIGSI communication directly on the device or via network. Furthermore, 2 SICAM I/O units
7XV5673 can be connected to this port. Port A can also be used for time synchronization using the NTP
protocol.
Port B serves for central communication between the device and a control center. It can be operated via data
lines or fiber optic cables. For the data transfer, there are standard protocols in accordance with IEC 60870-5-
103 available. The integration of the devices into the SINAUT LSA and SICAM automation systems can also be
implemented with this profile.
Alternatively, additional connection options are available with PROFIBUS DP and the DNP3.0 and MODBUS
protocols. If an EN100 module is available, you can use the protocols IEC61850, PROFINET or DNP3 TCP.
Furthermore, connecting a SICAM I/O unit is possible via IEC651850 GOOSE.
SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
Introduction
1.2 Application Scope
23