Working With Data Logs - Siemens S7-1200 System Manual

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Extended instructions

8.7 Recipes and Data logs

STATUS (W#16#)

Working with data logs

The data log files are stored as comma separated value format (*.csv) in persistent flash

memory. You can view the data logs by using the PLC Web server feature or by removing

the PLC memory card and inserting it in a standard PC card reader.

Viewing data logs with the PLC Web server feature

If the PLC PROFINET port and a PC are connected to a network, then you can use a PC

web browser like Microsoft Internet Explorer or Mozilla Firefox to access the built-in PLC

Web server. The PLC may be in run mode or stop mode when you operate the PLC Web

server. If the PLC is in run mode, then your control program continues to execute while the

PLC Web server is transferring log data through the network.

Web server access:

1. Enable the Web server in the Device Configuration for the target CPU (Page 603).

2. Connect your PC to the PLC through the PROFINET network (Page 606).

3. Access the CPU through the built-in Web server (Page 609).

4. Download, edit, and delete data log files with the "File Browser" standard Web page

5. Open the .csv file with a spreadsheet application like Microsoft Excel.

Viewing data logs on a PLC memory card

If the S7-1200 CPU has a "Program" type S7-1200 memory card inserted, then you can

remove the memory card and insert the card into a standard SD (Secure Digital) or MMC

(MultiMediaCard) card slot on a PC or PG. The PLC is in stop mode when the memory card

is removed and your control program is not executed.

Use the Windows file explorer and navigate to the \DataLog directory on the memory card.

All your \*.csv data log files are located in this directory.

MC is write-protected.

Too many open files.

S7-1200 Programmable controller

System Manual, 03/2014, A5E02486680-AG