PEr (Program error)
Lenze · 9300 Series
What does 0074 mean?
An error has occurred in the program flow of the device. This indicates an internal software issue within the controller's operating system, potentially requiring a software analysis by the manufacturer.
Common Causes
- Corrupted firmware image due to a failed update or power interruption during the update process.
- Memory write error in the internal flash or RAM, leading to instruction fetch errors.
- Hardware malfunction in the CPU or memory components of the controller.
- Unforeseen software state caused by an invalid parameter combination (e.g., P3-01 and P3-02 conflict).
- Internal watchdog timer expiration due to an infinite loop or process crash.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Perform a software reset by cycling the main power to the drive, then monitor for recurrence.
- 2
Check the current firmware version via parameter C0004; compare it to the latest available version from the manufacturer.
- 3
Attempt to re-upload the latest firmware version using the manufacturer's dedicated software tool and a service interface (e.g., USB or Ethernet port).
- 4
Verify all critical configuration parameters (e.g., C0003 for default settings) are within valid ranges after a firmware update or reset.
- 5
If the fault persists, contact technical support with the exact firmware version (C0004) and any error logs for advanced diagnostics.