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Old July 5th, 2019, 07:09 PM   #1

naturephoenix is offline
Join Date: Jan 2015
Location: Vienn
Posts: 181
Logging data with s7-1200 couple of days


I have following hardware:

S71214C CPU, CP 1243-1 for IEC 104 and Energy meter Sentron PAC3200. My Client at very beginning wanted me to transfer data from Sentron PAC via IEC 104 to utility master.

Once we have performed that he wants me to provide data logger for couple of days ( let's say 5 days) 100Bytes. These 100 bytes needs to be saved every 20 sec somewhere. So in 5 days that would be 2.1MB of data. Here is 4MB Simatic memory card for s71200 CPU series

6ES7954-8LC02-0AA0 . Will this be enough for this task or I need something else to perform this?
My alternative7second solution would be to provide small touch panel with USB stick. In that case I would store data on USB stick and read it on Touch Panel first and later on PLC.

Do you guys have something more clever in mind?
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Old July 11th, 2019, 01:30 PM   #2
United States

Jieve is offline
Join Date: Feb 2012
Location: USA
Posts: 199
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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