15 TIME SYNCHRONSIATION USING THE COMMUNICATION
PROTOCOLS
All communication protocols have in-built time synchronisation mechanisms. If neither IRIG-B nor SNTP is
used to synchronise the devices, the time synchronisation mechanism within the relevant serial protocol is
used. The real time is usually defined in the master station and communicated to the relevant IEDs via one
of the rear serial ports using the chosen protocol. It is also possible to define the time locally using settings in
the DATE AND TIME
column.
The time synchronisation for each protocol is described in the relevant protocol description sections as
follows:
● Courier Time Synchronisation (on page 203)
● IEC 60870-5-103 Time synchronisation (on page 205)
● DNP 3 Time Synchronisation (on page 209)
● Modbus time Synchronisation (on page 221)
Chapter 7 - SCADA Communications MiCOM P747
234 P747-TM-EN-1
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