15 TIME SYNCHRONSIATION USING THE COMMUNICATIONPROTOCOLSAll communication protocols have in-built time synchronisation mechanisms. If neither IRIG-B nor SNTP isused to synchronise the devices, the time synchronisation mechanism within the relevant serial protocol isused. The real time is usually defined in the master station and communicated to the relevant IEDs via oneof the rear serial ports using the chosen protocol. It is also possible to define the time locally using settings inthe DATE AND TIME column.The time synchronisation for each protocol is described in the relevant protocol description sections asfollows:● 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 P747234 P747-TM-EN-1
