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Unread July 11th, 2019, 01:30 PM   #2
United States

Jieve is offline
Join Date: Feb 2012
Location: USA
Posts: 195
If you want to store the data in the PLC, there are larger size cards available for the S7-1200 as well (24MB, 128, 256 and 1GB and probably others). You would save and store the data in load memory in the PLC. If you use the logging instructions, you can save to a csv file in the load memory and read and download directly from the webserver.

You could also do logging via HMI, and usb stick as suggested. At your time scale of 20 secs either would work fine.
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