The Siemens 6RA series DC drive (SIMOREG) is widely used in heavy industrial applications such as steel processing, rolling mills, cranes, and paper production. Due to its robustness and precision control capabilities, it remains a popular solution even today.
However, like all industrial automation equipment, the 6RA drive may encounter faults during operation. Understanding these fault codes, diagnostic parameters, and reset procedures is essential for minimizing downtime and ensuring stable performance.
This guide provides a complete explanation of Siemens 6RA fault codes, including how to read them, reset them, and troubleshoot effectively.
1. Overview of Siemens 6RA DC Drive
The Siemens 6RA (SIMOREG) is a DC drive system designed for high-performance motor control, especially in demanding industrial environments.
Key features:
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Precise speed and torque control
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High reliability under heavy loads
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Support for PMU and OP1S operator panels
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Advanced diagnostic and fault reporting system
2. How Fault Codes Work in Siemens 6RA
When a fault or alarm is triggered:
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The information is displayed on both:
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PMU (Parameterization Unit)
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OP1S operator panel
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The system stores diagnostic data in internal parameters
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Fault LEDs will illuminate (usually red)
Important behavior:
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Only one active fault is displayed at a time
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Additional faults may be hidden until the main fault is cleared
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Fault messages disappear automatically once the issue is resolved (in some cases)
3. How to Reset Siemens 6RA Faults
Method 1: Reset via PMU
To clear faults using the PMU panel:
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Press the “P” key + arrow keys to navigate
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Reset after ensuring the fault condition is removed
Method 2: Reset via OP1S
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Press the Reset key
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Make sure the panel is in “Run Display” mode
⚠️ Important Notes:
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If the fault cause still exists → reset will not work
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Some faults require power cycling
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In certain cases, faults will reappear after restart
4. Key Diagnostic Parameters (Very Important)
The Siemens 6RA system uses internal parameters to store fault details.
🔍 Main diagnostic parameters:
| Fault Code | Description | Possible Cause | Recommended Solution |
|---|---|---|---|
| F001 | Overcurrent | Short circuit, overload | Check wiring, reduce load |
| F004 | Field Circuit Fault | Field loss, wiring issue | Inspect field supply |
| F006 | Overvoltage | Regenerative energy | Check braking resistor |
| F007 | Undervoltage | Low input voltage | Stabilize power supply |
| F010 | Overtemperature | Cooling failure | Clean fan, improve airflow |
| F011 | Heatsink Overheat | Poor ventilation | Check cooling system |
| F018 | Hardware Fault | Internal damage | Replace module |
| F020 | Encoder Fault | Signal loss | Check encoder & cable |
| F030 | Speed Feedback Error | Feedback abnormal | Verify encoder signal |
| F040 | Fault Not Cleared | Root cause remains | Fix issue, then reset |
| F052 | External Fault | Interlock triggered | Check external signals |
| F060 | Communication Fault | Cable/module issue | Check connections |
| F080 | Parameter Fault | Wrong settings | Reload parameters |
| F100 | Internal Error | System failure | Restart or replace drive |
5. Common Siemens 6RA Fault Types
Although the exact fault codes vary, the most common categories include:
5.1 Overcurrent Fault
Cause:
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Motor overload
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Short circuit
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Incorrect parameter settings
Solution:
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Check motor wiring
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Verify current limits
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Inspect load conditions
5.2 Overvoltage Fault
Cause:
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Regenerative energy not dissipated
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Power supply instability
Solution:
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Check braking resistor
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Inspect supply voltage
5.3 Overtemperature Fault
Cause:
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Cooling failure
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High ambient temperature
Solution:
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Check fans and airflow
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Clean dust inside drive
5.4 External Fault (B0106)
This fault indicates external system conditions.
Possible triggers:
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External interlock signals
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Safety system activation
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Field circuit issues
6. How the System Responds to Faults
When a fault occurs, the system will:
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Disable firing pulses (output stopped)
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Switch the drive into fault status
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Display the fault on PMU and OP1S
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Store fault data for later analysis
7. Practical Troubleshooting Workflow
To diagnose Siemens 6RA faults efficiently, follow this process:
Step 1: Identify the fault code
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Check PMU / OP1S display
Step 2: Read diagnostic parameters
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Focus on r047 + r949
Step 3: Analyze root cause
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Electrical issue?
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Mechanical load?
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Parameter misconfiguration?
Step 4: Eliminate the cause
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Fix hardware / adjust parameters
Step 5: Reset the system
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Use PMU or OP1S
Step 6: Monitor system behavior
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Ensure fault does not reoccur
8. When Faults Cannot Be Cleared
If the fault persists:
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The issue may be hardware-related
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Internal components (IGBT, control board) may be damaged
👉 In this case:
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Repair or replacement is required
9. Replacement and Spare Parts Support
Many Siemens 6RA models are now:
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Discontinued
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Difficult to source from official channels
We can support you with:
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✔ Original Siemens 6RA drives
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✔ Refurbished units (fully tested)
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✔ Repair services
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✔ Fast worldwide shipping
💡 If you are facing issues like:
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Repeated fault alarms
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Drive not resetting
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System downtime
👉 Contact us for fast support and replacement solutions.
10. Conclusion
Understanding Siemens 6RA fault codes is essential for maintaining stable industrial operations.
By mastering:
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Fault code interpretation
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Diagnostic parameters (r047, r949, etc.)
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Reset procedures
👉 You can significantly reduce downtime and improve system reliability.
🚀 Need Help?
At the same time, we also provide Siemens 6RA drive. If you need any assistance, please contact us.
