PowerOne inverter connection to data logger via Ethernet

[Authorless]

I am looking for a solution to connect inverters of a photovoltaic system to a data logger and I believe I have found a solution among your products through the use of the ATC-1000 converter. I have already read in the various forums and I think it is feasible but I would like a confirmation. The current situation is as follows:

5 WEBSITE Power-One inverter 1 Solar-Log Datalogger with 3 RS485 ports
SITE B 4 SMA inverter No datalogger
SITE C 1 Inverter Power-One No datalogger

An internet connection is available on all sites. My intent was to transmit the RS485 signals outgoing from SITES B and C via the Internet to the site at SITE A, using the ATC-1000s. In the SITE A take these signals from the Internet and re-convert them to RS485 always with the use of the ATC-1000 (in this way I would create a sort of point-to-point between the ATC-1000s). 

At this point the ATC-1000s would be connected in the Solar-Log data logger present in SITE A through the RS485 ports. Is this installation feasible? Are other converter models recommended as an alternative?

[Sergio Bertana]

The solution is theoretically feasible but it's not that simple. In the meantime, you must have at least one public IP in one of the sites (Example SITE A) and if the IP is not static but dynamic you must go through a dynamic DNS and the Ethernet / Serial converter must use the DNS.

Now the ATC-1000 doesn't have DNS support, you should use the ATC-3000. Then take into account that Internet connections introduce latencies and it could be that the delays introduced cause the data logger to time out. Also the ATC-1000 does not accept multiple connections in TCP so if you only have UDP you should have public IPs in all sites.

Possible solution, ATC-3000 in SITE A, configured as a 2-connection TCP server, ATC-3000 in sites B and C configured as TCP clients that connect to the ATC-3000 in SITE A. The various inverters of SITE A are connected in RS485 between them and with the ATC to the data logger.

Now each inverter must have a different ID and the data logger request will go to all 3 sites but only the addressed inverter will respond.

[Author]

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