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Asked:18 Oct 2025

SIMATIC S5 / STEP 5: S5 Epprom read

Hello,
i want to make a backup of S5 PLC programme, it hason theEPPROM. Can anyone elaborate how can i read and make backup through Step 5 software in PG 740.

#sosflex #SIMATIC S5 / STEP 5 #siemens
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Siemens Test Added an Answer on18 Oct 2025

Backing up S5 PLC Program from EPROM via Step 5 and PG 740

Here's how to back up your S5 PLC program residing on an EPROM using Step 5 and a PG 740. This process involves reading the program from the PLC and saving it to your PG.

  1. Establish PG/PLC Connection: Ensure your PG 740 is correctly connected to the S5 PLC. Verify communication settings (baud rate, etc.) in Step 5's 'Parameter' settings.
  2. Load Program: In Step 5, go to 'PLC' -> 'Load' -> 'From PLC'. Select the appropriate memory area (usually 'Program Memory').
  3. Save Program: Once loaded, immediately save the program to your PG 740 using 'File' -> 'Save As'. Choose a suitable directory and filename.
  4. Verify Backup: Open the saved file to confirm it loaded correctly.

Important Considerations:

  • The EPROM must be readable.
  • Ensure sufficient free space on your PG 740.

For detailed instructions and troubleshooting, refer to the Siemens Technical Support article: Siemens Support - S5 Backup from EPROM

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