Internal fault – critical

What does F13.22 mean?

Encoder 1 is signaling a critical internal fault, meaning the encoder itself has detected a severe malfunction. This prevents the drive from receiving reliable position feedback and could lead to unsafe or uncontrolled operation.

• Catastrophic hardware failure within Encoder 1, such as a damaged ASIC (Application Specific Integrated Circuit) or optical sensor array.
• Complete loss of internal power regulation within Encoder 1, rendering the encoder inoperable and signaling a critical fault.
• Severe mechanical damage to Encoder 1 (e.g., bearing failure, shaft misalignment) causing internal sensor disruption.
• Persistent over-temperature condition within Encoder 1 exceeding its operational limits (e.g., >85°C) due to ambient conditions or internal failure.

Click steps to track your progress.

1. 1

   Verify the supply voltage to Encoder 1 at the encoder terminals (e.g., +10VDC or +24VDC) is within the specified tolerance.

2. 2

   Check the encoder housing for signs of physical damage, overheating (discoloration), or excessive vibration during operation.

3. 3

   Disconnect Encoder 1 and measure the resistance across its internal power supply pins (e.g., +V to 0V) to detect a short circuit.

4. 4

   Log any associated drive alarms (e.g., overcurrent or motor overload) that might indicate a secondary issue stressing the encoder.

5. 5

   As this is a critical internal fault, replace Encoder 1 with an identical, known-good unit for immediate troubleshooting.