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What Is the Indramat F860 Fault Code?
Indramat’s Long-Lasting Performance—and Inevitable Faults
Indramat, now under Bosch Rexroth, built a legacy of rugged, high-performance motors, drive controllers, and power supplies. Many of these products have reliably powered factory floors for over two decades—testament to their outstanding quality and longevity.
However, like any piece of industrial equipment, Indramat systems are not immune to eventual wear and electrical stress. When a problem arises, the system flags an error code on the drive controller’s status indicator, helping users quickly diagnose the issue.
One of the most critical of these codes is the F860 fault, a fatal error requiring immediate attention.
What Does the F860 Fault Code Mean?
Fault Code: F860 – Overcurrent: Short in Power Stage
The F860 fault code indicates that a severe overcurrent condition has been detected in the drive’s power stage. This happens when the current flowing through the power transistor bridge exceeds twice the drive’s rated peak current.
When this occurs:
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Torque output is immediately cut off.
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The drive controller shuts down.
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The motor’s holding brake (if installed) is automatically engaged for safety.
The drive’s display will show the fault in an alternating pattern: F8 followed by 60.
Common Causes of F860 Faults
| Cause | Description |
|---|---|
| Short Circuit in the Motor Cable | Damage or insulation failure in the motor cable can create a direct short, resulting in an overcurrent event. |
| Defective or Damaged Power Stage | Internal damage to the drive’s power transistor bridge can cause shorts or allow excess current to flow uncontrollably. |
| Incorrect Current Loop Parameters | Improper tuning or configuration of the drive’s current control settings can lead to unstable operation and overcurrent conditions. |
How to Address the F860 Fault
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Inspect the Motor Cable
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Look for visible damage such as cuts, abrasions, or melted insulation.
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Test for continuity and shorts between conductors and ground.
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Solution: Replace the motor cable if any defects are found.
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Evaluate the Drive’s Power Section
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If the motor cable checks out, the issue may be internal to the drive.
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Solution: If the drive’s power stage is defective, the entire drive controller will likely need to be replaced. Attempting to repair the power stage in-house is not recommended.
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Check and Correct Current Loop Parameters
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Review the drive configuration and ensure all current loop settings match the motor specifications and application requirements.
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Solution: Update or correct parameter settings using the appropriate Indramat configuration software or manual programming methods.
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Frequently Asked Questions (FAQs)
Can the F860 Fault Be Fixed Internally at the Factory?
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Yes, if:
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The fault is caused by a damaged motor cable or incorrect current loop settings.
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These repairs are typically straightforward and can be handled by an experienced in-house maintenance team.
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No, if:
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The fault stems from a damaged or defective power section within the drive.
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In this case, professional evaluation and replacement are strongly advised to avoid further damage or unsafe conditions.
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For more information , contact PLG Automation:Email: sales@plgautomation.comPhone: 800-906-9271