Siemens SIMATIC S7 System Manual page 309

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Data log files created by the example program viewed with the S7-1200 CPU Webserver

Table 8- 139 Downloaded .csv file examples viewed with Microsoft Excel

Two records written in a five record

maximum file

Five records in a Data log file with a five

record maximum

After one additional record is written to the

file above which is full, the sixth write

operation overwrites the oldest record one

with record six. Another write operation

will overwrite record two with record

seven and so on.

S7-1200 Programmable controller

System Manual, 11/2011, A5E02486680-05

101BExtended instructions

8.7 Data logging

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Simatic s7-1200