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During the operational time, Time Synchro for the IEDs within the Substation Automation System is an important aspect to consider. Why? Because the event log of the alarm system will have different logging times. This can make you confused because of the different timekeeping between Local and SCADA. Siemens
Here is the sample of Synchro Time Status on hopf SNTP (7273).
- ON: Time Synchro OK
- OFF: Time Synchro Not OK
The Substation Automation Time Synchro
The log time of an alarm within the Substation Automation System should be no difference between the IEDs, Server, Human Machine Interface, and SCADA. During the commissioning test, make sure all of the IEDs or other devices within the system get the SNTP Configuration.
Here is the illustration:
The connections between SNTP and all of the IEDs are supported by an ethernet switch that is usually applied with the optical fiber connection.