Hi all, I am investigating various solutions for data capture from PLC's and I have stumbled upon Ignition since it has a Driver for Siemens. The main factor that I am interested in, is the amount of tags I can read per second from the PLC. After reading some other topics it seems that this would …

I don't have any hard answers for you. I can only offer less tangible advice, like making sure the network connection is local/good, that whatever the PLC program is actually doing may influence how much time is left over for comms, and that whether or not other systems are also making and using S7…

The S7-1500 also supports OPC UA, so if the overall number of tags you need to monitor (Monitored Items in OPC UA terminology) is less than the number of Monitored Items supported by the hardware model you'll be using, you don't have to worry about "tags per second" because OPC UA subscriptions are …

Hi Kevin, Thanks for you fast reply and advice. I have also been testing Allen-Bradley PLC and with default settings and I got 500 tag readings per second. Now what I am trying to achieve is 10.000 tag reads per second or even more and I know that OPC UA is not meant for this. Do you know if it i…

@Edy_Moc , We are currently busy with a Siemens project and opc UA communication with onboard opc server and it's really not mean for high speed monitoring. I think you will be better with the siemens driver with the drawback of non optimized db so bee sure to structure your db in a logical way to a…

[image] Edy_Moc: I have also been testing Allen-Bradley PLC and with default settings and I got 500 tag readings per second. That is untypically terrible performance for modern Logix controllers. You should be able to optimize to read ten thousand values per second without difficulty. Rockw…

10,000 tags/s with the Logix driver is generally attainable. [image] Edy_Moc: I have found this article that mentioned Large Historian configuration with 8 Cores (4 GHz+), 16GB memory, SSD able to do 5,000 - 10,000 tags per second? Subscribing to 10,000 tags @ 1s doesn't mean storing 10,000 …

Thanks all for the answers, this sheds hope that I should be able to achieve my goals. Given that Rockwell is way better than Siemens, I still get back to my initial question: What are the factors affecting the amount of tags I can read per second (given that the tags change every second), for Roc…

[image] Edy_Moc: Currently I tried to change the CIP value to 50 If you're talking about the Concurrent Requests setting, this is too high. Please be specific about what setting you are changing. [image] Edy_Moc: Is there any impact depending on where the Ignition designer is running or …

Also, are these individual elementary tags or such aliases? Or arrays or UDT instances? The fundamental unit of access/optimization is the top level tag, so 5000 individual DINTs will be way slower than an array of 5000 DINTs. Considering that this topic is about Siemens, the Logix discussion shou…

Dear @Kevin.Herron and @pturmel , thanks for your answers and following questions. I have read your suggested forums and tried to find all the answers to your questions. I have also changed the name of this Discussion so it mentions both Siemens and Rockwell. The "CIP connection Size" value that I m…

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