Communication Interruption (Keypad)

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The communication link between the remote keypad and the soft starter has been interrupted. This message flashes after 20 retries within a 50 ms timeout, indicating a loss of connection.

• Loose or disconnected ribbon cable/communication cable connecting the remote keypad to the soft starter's communication port.
• Excessive electromagnetic interference (EMI) disrupting the communication signals between the keypad and soft starter.
• Faulty remote keypad unit or soft starter's communication port hardware.
• Incorrect keypad connection or usage of a non-compatible cable length or type.
• Physical damage to the communication cable (e.g., crushing, cut, broken conductor).

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1. 1

   1. Power down the soft starter, then carefully inspect and re-seat the communication cable connecting the keypad to the soft starter.

2. 2

   2. Check the communication cable for any visible damage, cuts, or crushed sections and replace it with an identical, compatible cable if necessary.

3. 3

   3. Ensure the communication cable is routed away from power cables or other sources of high electromagnetic interference (EMI).

4. 4

   4. Test communication with a known good, compatible remote keypad to rule out a faulty keypad unit.

5. 5

   5. Measure voltage levels on the communication lines (e.g., 5VDC, data lines) at both ends of the cable to check for signal integrity.