Analog input open circuit programmable

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The AI1 analog input is detected as an open circuit, meaning there's no signal or connection present. This prevents proper control or feedback based on the analog input, leading to loss of control or incorrect operation if that input is active.

• Disconnected or broken wire in the analog input signal cable (e.g., between sensor and drive terminal X10/AI1).
• Faulty analog sensor itself (e.g., 4-20mA transducer failure, internal open circuit, no output voltage).
• Incorrect wiring termination at the drive's analog input terminals (e.g., AI1 not connected to AGND for loop return).
• Configuration error in the drive where AI1 is expected but not physically connected or assigned in P6-01.
• External interference causing the signal to drop below the open-circuit detection threshold (e.g., <2mA for 4-20mA input).

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1. 1

   1. Measure the resistance of the analog input signal wire from end to end (e.g., expect <5 Ohms for continuity) with power off.

2. 2

   2. Measure the output signal directly from the analog sensor (e.g., 4-20mA or 0-10VDC) at its terminals.

3. 3

   3. Verify wiring connections at drive terminals X10/AI1 and AGND for secure and correct termination (e.g., shielded cable connected to AGND).

4. 4

   4. Set parameter P6-01 (AI1 Function) to 'Disabled' if the input is not used, or ensure it's configured for the correct signal type (e.g., '4-20mA Current Input').

5. 5

   5. If using a 4-20mA sensor, measure the loop current with an ammeter in series at the drive's input terminals.