4 mA Input Fault

What does E.LCI mean?

This fault specifically indicates an issue with a 4-20mA analog current input signal. The fault typically triggers if the input current drops below 4mA (e.g., 0mA), indicating a broken wire or sensor failure.

• Open circuit or broken wire in the 4-20mA analog input loop to the FR-A800 (e.g., terminal 4 or 5).
• Failure of the external sensor or transducer providing the 4-20mA signal.
• Incorrect wiring (e.g., polarity reversal) or loose connections in the current loop.
• Input current falling below the fault detection threshold (typically 4mA or slightly below) due to a sensor or wiring issue.
• Internal fault with the FR-A800's 4-20mA input circuit.

Click steps to track your progress.

1. 1

   Verify the wiring of the 4-20mA input signal to the FR-A800 (e.g., terminals 4, 5) for secure connections and continuity.

2. 2

   Measure the current in the 4-20mA loop at the FR-A800 terminals using an ammeter to confirm the signal presence and value.

3. 3

   Check the external sensor or transducer that generates the 4-20mA signal for proper operation and power supply.

4. 4

   Inspect the current loop wiring for any breaks, shorts, or high resistance connections.

5. 5

   Ensure that the analog input parameter settings in the FR-A800 (e.g., Pr.59 for analog input selection, scaling parameters) are correctly configured for 4-20mA input.