Follower fault

What does 74 mean?

In a Master-Follower configuration, this fault code is generated when one or more of the follower drives trip into a fault state. This indicates an underlying issue with a specific follower drive, which then propagates to the master. The master cannot resume normal operation until the root fault on the follower drive(s) is identified and resolved.

• One of the follower drives has experienced an internal fault (e.g., overcurrent, overvoltage, motor overload) independent of the master.
• Communication loss to a specific follower drive, causing it to fault out (e.g., similar to Code 59).
• Mechanical issue on the follower's motor or load, causing it to draw excessive current or stall.
• Incorrect configuration of a follower drive parameter (e.g., P1-01 for motor power, P1-02 for motor voltage) leading to individual fault.
• Power supply issue to one of the follower drives (e.g., phase loss, undervoltage).

Click steps to track your progress.

1. 1

   Identify the specific follower drive that is reporting the fault by checking its local display or error log.

2. 2

   Access the identified follower drive's fault history or status screen to determine the specific fault code (e.g., Code 11 Overcurrent).

3. 3

   Check the power supply (e.g., R, S, T terminals) to the faulty follower drive using a multimeter for correct voltage and phase presence.

4. 4

   Verify communication status (e.g., activity LEDs) on the faulty follower drive's communication option board.

5. 5

   Inspect the motor and mechanical load connected to the faulty follower drive for any mechanical binding or obstruction.

6. 6

   Compare key operating parameters (e.g., P1-01, P1-02, P1-03) of the faulty follower drive with a working follower drive for discrepancies.