Cause: Analog input wire breakage comes when the wire-break monitoring for an analog input has responded. The input current of the analog input has undershot the threshold value.

f3505 siemens indicates analog input wire breakage. This means the wire break monitoring function for an analog input (often a 4-20mA signal) detects that the input current has fallen below the threshold value.

Troubleshooting Steps:

Follow these steps to correct f3505 siemens:

• Carefully inspect the wiring between the signal source (e.g., a sensor, PLC analog output) and the analog input terminals of the Siemens drive.
• Look for any loose connections, broken wires, or damaged insulation.
• Check if the signal source is providing the expected analog signal (e.g., a current of 4-20mA or a voltage within the specified range).
• Use a multimeter to measure the output of the signal source at the terminals where it connects to the drive.
• Ensure that the analog input is correctly configured for the type of signal you are using (e.g., unipolar current input monitored (+4 mA to +20 mA)).