Inovance drive error code 731 indicates a problem with the encoder battery. The encoder is a crucial component of a servo motor system, providing feedback on the motor's position and speed. The encoder usually has a small battery that helps retain its settings even when the main power is off.

Here's a breakdown of the error and how to potentially resolve it:

Error Description:

• Code: 731
• Meaning: Encoder battery failure

Possible Causes:

• Low Encoder Battery Voltage: The battery voltage in the encoder might be too low to function properly.
• Missing or Incorrect Battery: The encoder might not have a battery installed, or the installed battery might be the wrong type.
• Encoder Malfunction: In rare cases, the error could indicate a problem with the encoder itself.

Troubleshooting Steps:

1. Check Battery Connection: Ensure the encoder battery is properly connected to the encoder.
2. Replace Battery: If the battery is connected, it's likely depleted. Locate the correct replacement battery based on the encoder model and replace the old one.
3. Reset Drive Parameter (H0D-20): Some Inovance drives allow resetting a parameter (H0D-20) to acknowledge the encoder battery replacement and clear the error code.