MOT TORQ LIM

What does FF85 mean?

The ABB ACS800 drive is actively limiting motor torque based on the calculated motor pull-out torque limit and the minimum/maximum torque limits defined by parameters 20.13 (MIN TORQ SEL) and 20.14 (MAX TORQ SEL). This is an informative alarm (3.18 AW 5 bit 11) indicating the drive is operating near its torque boundaries, and its behavior can be configured via Fault Function 30.23.

• Application demands exceed the maximum motor torque limit set by parameter 20.14 (MAX TORQ SEL).
• Application attempts to operate below the minimum torque limit set by parameter 20.13 (MIN TORQ SEL).
• Incorrect settings of parameter 20.13 or 20.14, which may be too restrictive for the application's actual torque requirements.
• Fault Function parameter 30.23 (LIMIT WARNING) is configured to activate this informative alarm.
• Incorrect motor parameter settings in group 99 START-UP DATA or an unsuccessful motor ID run, especially if LIMIT WORD 1 bit 0 TORQ MOTOR LIM is active.

Click steps to track your progress.

1. 1

   Check parameter 20.13 (MIN TORQ SEL) and 20.14 (MAX TORQ SEL) settings in the ABB ACS800 drive to ensure they are appropriate for the motor and application's torque requirements.

2. 2

   Evaluate the application's torque demands; reduce the load or adjust operating conditions if torque limits are consistently being reached.

3. 3

   Verify parameter 30.23 (LIMIT WARNING) to ensure it is configured as desired for informative alarm activation and not causing unnecessary interruptions.

4. 4

   If LIMIT WORD 1 bit 0 TORQ MOTOR LIM is active, carefully check all motor parameter settings in group 99 START-UP DATA against the motor nameplate for accuracy.

5. 5

   Ensure that a successful motor ID run has been completed to accurately identify motor electrical characteristics and enable precise torque control.