S7 V5.5 Hardware Configuration Download Issue

Hello,

We understand you're experiencing issues downloading hardware configurations with the download button in S7 V5.5 SP3, while System Data download works. This is a known issue affecting some users.

Possible Causes & Solutions:

• Corrupted Project Files: While you've reinstalled S7, ensure all temporary files and backup project copies are also removed.
• STEP 7 Installation Issue: A repair only temporarily fixes the problem, indicating a deeper installation corruption. Consider a complete uninstall and reinstall, ensuring administrator privileges.
• Windows Profile Corruption: Rarely, issues within your Windows user profile can cause this. Try logging in with a different Windows user account and testing.

Workaround: Continue using the System Data download as a temporary solution.

Further Support:

Please search for similar issues and solutions in the Siemens Support Portal: Siemens Support Portal. Use keywords like "S7 V5.5 download hardware configuration failed". If the problem persists, create a support request through the portal with detailed information about your setup.

Sincerely,
Siemens Self Support

Downloading a Modified Program to an S7-300 PLC via Monitoring PC

Here's a streamlined guide to downloading your modified program to an S7-300 PLC connected via Ethernet, using a monitoring PC and your USB storage:

1. Transfer Program to PC: Copy the modified program from your USB storage device to the monitoring PC.
2. Establish Connection: Open Siemens STEP 7 (or TIA Portal if applicable). Configure the connection settings in STEP 7 to communicate with the target S7-300 PLC via Ethernet. Verify you can 'PG/PC Interface' to the PLC successfully.
3. Download: In STEP 7, go to "PLC" -> "Download to PLC" (or the equivalent command in TIA Portal).
4. Select Program: Select the modified program file you transferred to the PC.
5. Download Options: Choose the appropriate download mode (e.g., complete download with parameter transfer).
6. Monitoring: Monitor the download process. The PLC will likely restart automatically after a successful download.
7. Verification: Once the PLC is running, verify the program is functioning correctly.

Important Considerations:

• Ensure the hardware configuration in STEP 7 matches the actual PLC setup.
• Verify network connectivity between the PC and the PLC.
• Back up the existing program on the PLC before downloading, if possible.

For detailed instructions and troubleshooting, refer to the Siemens Support resources: