What Does the Indramat F401 Error Code Indicate?

Indramat drive controllers are recognized for their superior performance and dependability. Nonetheless, similar to any mechanical or electronic device, they can encounter errors as time progresses. Since Indramat has been discontinued and its products are no longer manufactured, resolving errors when they arise can be challenging. The documentation for the drive controller includes a detailed list of potential errors, their corresponding fault codes, causes, and suggested remedies.

The F401 error is called a "Double MST Error Shutdown" error. MST refers to "Master-Sync-Telegram." This error takes place when the drive controller fails to receive the master-sync-telegram over two consecutive SERCOS cycles, causing the drive to automatically shut down. It is necessary to clear this fault code to restore system operation.

Common Causes for the F401 Fault Code

The F401 fault code is primarily caused by three factors:

1. Disruptions in the fiber optic cables, which could be due to loose connections or physical damage to the cables.

2. Excessive weakening (attenuation) of the light signal.

3. Faults in the SERCOS interface unit.

Frequently Asked Questions

Q: What are the steps to address the F401 fault code?

A: Initially, refer to the drive controller's user manual. Fiber optic cables, which transmit data via light through plastic or glass fibers, should have secure and intact connections. Check the connections within the SERCOS ring carefully. If connections are secure, test the cables by replacing them with another set to determine if the cables are faulty.

Next, verify the attenuation levels of the light signals between the transmitter and receiver, which ideally should not surpass 12.5 dB. If above this limit, adjustments are necessary. Also, ensure the SERCOS interface is properly positioned in its slot. If issues persist, replacement of the interface might be required.

Q: Is it possible to rectify the F401 fault code internally

A: Typically, Indramat products are not suited for in-house repairs. However, some basic checks, such as securing cable connections or replacing a SERCOS interface, can be performed on-site. For more intricate repairs, such as replacing motors or drives, professional assistance is recommended.