I am trying to transfer the maximum amount of Modbus points between an RTAC and the openHistorian.
Can I set only one sequence with 500 registers or should I split in many sequences with a maximum of 125 registers/pool (recommended is 100)? Does “sequence” has the same meaning as the Modbus “pool” in this case?
In the “Inter Sequence Group Pool Delay”, the minimum time of that field is 100ms. That means 10 sequences in one second.
If I understood it right, I can create a Modbus connection between the RTAC and the openHistorian that can pool up to 10 sequences of 125 registers (16bits). In theory, I could read up to 1250 registers every second with that Modbus Link. Is that right?
Can we increase that, considering the RTAC has the registers aligned in sequence from 1… end? Will it be better if I use DNP3 or any other protocol?
If I have 2 devices, will the historian read all the sequences of the first, and then go to the next device ? or it will read the 1st sequence of all the devices and then go to the next sequence?
Thanks again for the help!