SI-T Watchdog Error

What does E5 mean?

This fault indicates a consistency error in received control data or a synchronization problem between the master controller and the Drive when using an SI-T option card. It signifies a breakdown in reliable communication, which can lead to unpredictable Drive behavior or complete loss of control. Such errors require immediate attention to restore stable operation.

• Loss of communication or intermittent connection between the master controller (e.g., PLC, HMI) and the SI-T option card.
• Incorrect communication parameters (e.g., baud rate, parity, address) configured on either the master controller or the SI-T card (parameters C5-01 to C5-05 for Modbus).
• Excessive electrical noise on the communication bus preventing reliable data transmission and causing watchdog timeout.
• Firmware mismatch or corruption on the SI-T option card or the Drive's main control board.
• Hardware failure of the SI-T option card itself, affecting its ability to process or receive data consistently.

Click steps to track your progress.

1. 1

   Verify the physical integrity of the communication cable (e.g., Ethernet, RS-485) connected to the SI-T option card for loose connections or damage.

2. 2

   Check the communication parameters (e.g., C5-01 to C5-05 for serial communication) in the Drive and on the master controller to ensure they match precisely.

3. 3

   Use a network diagnostic tool (e.g., Wireshark for Ethernet/IP) to monitor traffic on the communication bus for dropped packets or errors.

4. 4

   Isolate the SI-T option card by powering down the Drive, removing, and re-inserting the card to ensure proper seating.

5. 5

   Update the Drive's firmware, which may include updates for the SI-T option card, to resolve potential software bugs.