Siemens 7XV5673 Device Manual page 12

1 User Information
Communication
For communication with systems control and other substations for process automation, the Ethernet interface
and the serial interface (RS485 or optical) are available.
The device parameterization, the transfer of indications and the time synchronization with NTP is supported
via Ethernet. The communication protocols are HTTP, Modbus TCP, Modbus UDP, IEC 61850, and NTP. The
client or server mode is used for the binary signal transmission.
The serial interface supports the transfer of indications and time synchronization. Depending on
parameterization, the Modbus RTU communication protocol is used for communication; and the client or
server mode is used for the binary signal transmission.
With the Ethernet switch that is integrated in the device, further network components can be cascaded via a Y
cable, and can therefore also be incorporated in an existing network with IEC 61850 or an other Ethernet pro-
tocol.
Time Synchronization
In operation, the device needs the date and time for all time relevant processes. This ensures a uniform time
basis and a time stamp for the communication with peripheral devices. The following types of time
synchronization are performed according to parameterization:
• External time synchronization via Ethernet NTP
• External time synchronization via fieldbus with Modbus RTU, Modbus TCP or Modbus UDP communica-
tion protocol
• Internal time synchronization via RTC (if there is no external time synchronization)
12 SICAM I/O Unit, 7XV5673, Device Manual
E50417-H1040-C484-A3, Edition 05.2012