Fault F07815 on the SINAMICS S120 in this case indicates that the installed power module does not match the power module stored in the CU310-2 DP configuration. Restore a valid STARTER connection, upload the existing project, replace the configured power module offline, and download the corrected project.
Identify the Configuration Mismatch
The reported hardware is a CU310-2 DP, order number 6SL3040-1LA00-0AA0, Version D. The decisive diagnosis is a mismatch between the power module currently used and the power module configured in the saved drive data. Resetting or restarting the drive for 10 seconds did not correct that mismatch.
| Observation | Engineering decision |
|---|---|
| Old project is accepted; new project is rejected | Preserve and upload the working project before changing its power-module configuration. |
| STARTER reports online firmware V4.5 | Configure the offline CU310-2 DP project for V4.5 before attempting to connect. |
| Memory-card marking states V2.6 SP2 HF19 | Do not format the card. The evidence states that CU310-2 devices require V4.x firmware and that V2.6 SP2 HF19 applies to CU310DP, not CU310-2 DP. |
Restore STARTER Communication
Match the offline device and firmware selection to the online CU. For the reported installation, configuring a CU310-2 DP V4.5 offline and then successfully going online confirms that the drive is running V4.5. If STARTER cannot detect the CU, verify the selected PG/PC interface and inspect Accessible Nodes.
When using TCP/IP through the front X127 interface, test communication with IP address 169.254.11.22. A successful ping, such as the reported 1 ms reply with TTL 64, confirms basic IP reachability but does not prove that STARTER can identify or download to the CU.
Correct the Power-Module Configuration
- Go online with the CU and upload the existing project that contains F07815.
- Go offline and save the uploaded project.
- Open the drive power-module configuration and start offline configuration.
- Select the power module that is now physically installed, then complete the configuration.
- Save the corrected project.
- Go online and download the project to the CU.
Do not format the memory card as a troubleshooting step. If a factory reset is still required after communication is established, use the Reset to factory button in STARTER, located immediately to the right of the Go Offline button. A reset alone does not replace the required power-module selection in the project.
Resolve a Rejected Download
If STARTER reports “Error occurred while loading to target system” and “Copy RAM to ROM not performed for any device,” acknowledge the message, expand the target-system output detail view, and inspect the Alarm tab. In the reported case, the detailed output identified an invalid value in parameter 346; correcting that value was required before downloading again. Treat this as a case-specific download blocker rather than the definition of F07815.
Verify recovery by confirming that the download completes, Copy RAM to ROM succeeds, and F07815 is no longer present in the Alarm tab or on the BOP. If STARTER still cannot detect the CU, resolve PG/PC interface or Accessible Nodes discovery before attempting further configuration changes.
FAQ
What causes SINAMICS S120 fault F07815?
In this case, F07815 means the installed power module differs from the power module saved in the CU configuration. Upload the existing project, select the installed power module offline, and download the corrected project.
Should I format the SINAMICS S120 memory card to clear F07815?
No. The evidence explicitly advises against formatting; preserve the project and correct the configured power module instead.
Why does STARTER fail to download after correcting F07815?
Expand the target-system output and inspect the Alarm tab. In the reported case, parameter 346 contained an invalid value, preventing the download and Copy RAM to ROM operation.