Motor temperature sensor error

Was bedeutet Sd6 ?

The encoder for detecting the motor temperature at X7 or X8 is indicating undefined values. This prevents proper motor thermal protection and could lead to motor damage due to overheating.

• Open circuit in the motor temperature sensor (e.g., PTC, KTY, PT100/1000) wiring connected to X7 or X8 terminal.
• Short circuit in the temperature sensor wiring, causing a resistance value outside the normal operating range.
• Damaged temperature sensor element within the motor winding, often due to overheating or mechanical stress.
• Incorrect sensor type configured in the drive parameters (e.g., P3-50, P3-51) compared to the actual installed sensor.
• Electromagnetic interference on the temperature sensor cable, especially for analog (e.g., PT100/1000) signals, leading to erratic readings.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Power off the drive, disconnect the temperature sensor cable from X7 or X8, and measure the sensor resistance at ambient temperature.

2. 2

   Compare the measured resistance to the sensor's datasheet (e.g., ~25 Ohm for PTC, ~1k Ohm for KTY at 20°C, ~100 Ohm for PT100 at 0°C).

3. 3

   Verify drive parameters (e.g., P3-50, P3-51) are correctly configured for the specific type of motor temperature sensor installed.

4. 4

   Inspect the sensor cable for cuts, insulation damage, or loose connections at X7/X8 terminals and the motor connection box.

5. 5

   If using a PT100/1000 sensor, verify the cable shielding is properly connected and grounded to prevent EMI.

6. 6

   Temporarily connect a known good resistor of appropriate value (e.g., 25 Ohm for PTC) across the X7/X8 input to bypass the sensor and check the drive's response.