FEN temperature

What does A782 mean?

An error in temperature measurement from a KTY or PTC sensor connected to encoder interface FEN-xx has occurred. This could be due to incorrect parameter settings or using an unsupported sensor type (e.g., KTY on FEN-01). Inaccurate temperature feedback risks motor overheating or improper thermal protection.

• KTY/PTC temperature sensor wiring is open-circuited, short-circuited, or has high resistance due to damaged insulation.
• Incorrect parameter setting for the sensor type (e.g., `P30.07` (Motor thermistor type) set to KTY when a PTC is connected, or vice-versa).
• Faulty KTY/PTC temperature sensor itself, providing out-of-range resistance values.
• Electromagnetic compatibility (EMC) noise affecting the low-voltage analog signal from the temperature sensor due to improper shielding.

Click steps to track your progress.

1. 1

   Power down the drive. Disconnect the temperature sensor leads from the FEN-xx interface terminals and measure the sensor's resistance directly (e.g., a `KTY84-130` should be around `1000 Ohms` at `25°C`).

2. 2

   Inspect the sensor cable for physical damage, proper shielding (if applicable), and secure connection to the FEN-xx module terminals.

3. 3

   Verify the drive parameter `P30.07` (Motor thermistor type) is correctly set to match the connected KTY or PTC sensor type.

4. 4

   If the sensor is located in the motor winding, test for continuity between the sensor leads and the motor frame, ensuring isolation (should be open circuit).

5. 5

   Temporarily connect a known-good resistance value (e.g., `1k Ohm` resistor for KTY84) across the FEN-xx temperature input terminals to simulate a valid sensor reading and observe if the fault clears.