Geo SCADA OPC Advanced Protocol for Events Time stamping

[syedghouse]

Hello Everyone,

     I was trying to perform timestamping(SOE) in Geo SCADA using OPC advanced protocol through OFS server(Using M580 Controller).

I am able to observe the timestamping in OFS client as shown below.

But the same timestamp is not recorded in Geo SCADA Events, instead it is recording Geo SCADA scan timing.

OFS Client

Geo SCADA Events

 

OPC Advanced server configuration

Appreciate your recommendations and ideas on the above mentioned issue.

 

[AndrewScott]

@syedghouse The attached Geo SCADA Events screenshot is too small to read, so I can't see what these events are.

[syedghouse]

@AndrewScott I have attached the picture now. Thanks

[AndrewScott]

The OFS client screenshot shows a time of 15:00:50.302.

The Geo SCADA events screenshot covers the period 16:08:26.737 to 16:10:07.201.

So these two don't overlap.

Are you expecting to see a state change event in Geo SCADA with a timestamp of 09-SEP-2025 15:00:50.302?

As you've configured Data Timestamp as Use Time from OPC DA Server in the server settings Geo SCADA will use the timestamp received from the OPC DA server for any events that are logged when processing the data.

You're using asynchronous mode so the OPC DA server will push changes to Geo SCADA when they occur and this includes a timestamp (in other words there is no scanning, its report by exception). I would guess that the OFS client is using synchronous mode so the OPC DA server will just give the latest timestamp.

[syedghouse]

Yes @AndrewScott I was expecting to see the state change event at 15:00:50.302 at Geo SCADA.

But it is not happening, I have attached another picture to show the period where the event should have been recorded.

Are you recommending me to change the mode to synchronous in OPC DA Server in Geo SCADA?

[AndrewScott]

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Are you recommending me to change the mode to synchronous in OPC DA Server in Geo SCADA?

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No, asynchronous mode is much more efficient.

The point I was making is that if the OFS client is using synchronous mode then the timestamp it shows may not be the time of the last state change. It depends on the behaviour of the OPC DA server.

What evidence do you have that this item changed to the value of one at 15:00:50.302, and not earlier at 14:59:38.042 as logged by Geo SCADA?

Another thing to consider, are both clients using the same time zone? By default, Geo SCADA uses the local time zone of the PC where ViewX is running. I don't know what time zone the OFS client uses.