Start Prevented

What does 76 mean?

The drive's start command has been blocked, primarily to prevent accidental motor rotation, especially during the initial power-up sequence. This is a safety feature to ensure the system is in a known, safe state before operation. The drive will not operate until this prevention is cleared.

• An active safety interlock signal (e.g., Safe Torque Off via terminals STO1/STO2) is preventing motor start.
• The drive is in a fault state and requires a fault reset before a start command can be accepted (check status word P0-01).
• Parameter P1-11 (Auto Restart) is set to 'No' or 'Fault Reset Only', preventing automatic restart after power-up or fault.
• The speed reference command is zero, and the minimum speed parameter (P1-01) is set above zero, requiring a non-zero reference.
• External run command via digital input is not active, or a communication link (fieldbus) is not sending a valid run command.

Click steps to track your progress.

1. 1

   1. Verify the status of all safety inputs (e.g., STO terminals, emergency stop circuits) and ensure they are disengaged.

2. 2

   2. Check the drive's status word (P0-01) for any active faults and perform a fault reset if required.

3. 3

   3. Confirm the speed reference input (e.g., analog input terminal AI1 or fieldbus reference) is providing a non-zero value.

4. 4

   4. Review parameter P1-11 (Auto Restart) and adjust it if a different automatic start behavior is desired.

5. 5

   5. Measure the voltage across the digital input terminals configured for the run command (e.g., DI1 to GND) to confirm signal presence.

6. 6

   6. If using fieldbus, confirm the fieldbus master is actively sending a run command bit in its output data.