Sd5 Analog input current < 2 mA

What does x085 mean?

The input current at analog input X6/1 or X6/2 has fallen below 2 mA. This monitoring function is only active if parameter C0034 is set to 1, indicating a low current condition on the analog input.

• Broken wire or loose connection in the 4-20mA current loop connected to analog input X6/1 or X6/2.
• Faulty 4-20mA current loop sensor (e.g., pressure transducer, flow meter) failing to output the minimum 4mA signal.
• External power supply for the current loop failing or dropping below the required voltage for the sensor.
• Excessive resistance in the current loop wiring, causing a voltage drop that prevents sufficient current flow.
• Incorrect configuration of parameter C0034, which enables the < 2mA monitoring function.

Click steps to track your progress.

1. 1

   Measure the current directly in series with the analog input X6/1 or X6/2 using an ammeter to verify the current value.

2. 2

   Inspect all wiring connections for the 4-20mA loop, ensuring secure terminals and checking for cable damage or splices.

3. 3

   Verify the external power supply for the current loop sensor, ensuring it provides the correct voltage (e.g., 24VDC) and adequate current capacity.

4. 4

   Test the 4-20mA sensor independently by applying its rated power and measuring its output current with an ammeter.

5. 5

   Check parameter C0034; if the monitoring is not desired or needed, consider changing its setting (e.g., to 0 to disable low current fault).