guideline to maximize freelance controller as a RTU (IEC-104)
Redundant freelance controller PM9001F (around 57 nodes) communicate with central SCADA (800xA) via redundant MTU PM9002F. expecting guide line from expertise who did similar setup. IEC-104 is the palnned communication protocol between MTU and RTU.
I have few concern,
1. how good will be data update rate in SCADA (fast ethernet over FO is considered)
2. Provision for local data archive in case of communication failure.
3. Can one PM9002F can hand 57 IEC-104 nodes/
4. can i get better data update rate if use OPC server?
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Thanks guys for quick update.
I understand limitaions of using 902M as data concentrator. If I use SCADAvantage with PM901F,
1. SCADA (SCDAvantage and RTU 901F) communicate via OPC?
2. "There is a application built in with SCADA Vantage and Freelance controllers to store the data /alarms in RTU in case of loss of communication. Also once communication is restored RTU shall backfill the data into the SCADA Vantage". this can be achieved even if i use OPC to communicate between RTU and SCADA.
3.OPC link will be used to communicate with top 800xA system. Is there any provision to migrate the SCADAvantage graphics to 800xA in case.
Please contact Rajendra Sevalkar. He was heavily involved in ONGC which used Freelance controllers communicating with SCADA Vision from ABB. He might be able to shed some light on your questions.
Just out of curiosity: Why do you want to connect the 57 PM 901F stations to one PM 902F. Why don't the 57 nodes talk directly to your SCADA system?
A single PM902FD can handle max 20 IEC ...-104 devices.
I see one problem right from the beginning. If You want to use PM902F as a Controlling station, then it can only handle up to 20 IEC-104 connections to substations and from what I understood You need at least 57.
Using an OPC server will be most likely a better choice in this case, as You would need one even when connecting to AC 900F.
As for the local data buffering - You can do this in application, but only on a very limited scale, as there is no way to use external data storage (like SD or USB data storage). I would say it all depends on what You need.
Hope this helps a little,
If u use OFC link between SCADA and RTU, The update shall be quick and can be configured based on OPC Server SCAN Time say 1s, 2s or 5s as required by application
You should use SCADA Vantage to consolidate data from all the 57 RTU in the central location. There is a application built in with SCADA Vantage and Freelance controllers to store the data /alarms in RTU in case of loss of communication. Also once communication is restored RTU shall backfill the data into the SCADA Vantage.
If 800xA in the top central location is must then use again OPC link with SCADA Vantage to take data in to 800xA.
You will get better update time with OPC as it is periodic. IEC 104 shall give u exeception reporting. I think it is your application and customer specification which shall define the use of protocol.