No Connected Load / Short Circuit to +24V

What does DIAG_01 (Channel S1/S0 or S3/S2) mean?

The diagnostic bits S1/S0 or S3/S2 for a digital output channel on module 75x-506 are set to '01'. This indicates either no load is connected to the output channel or a short circuit exists between the output and the +24V supply. This condition prevents the output from functioning as intended and alerts to a wiring issue.

• No load is physically connected to the digital output channel terminals.
• A short circuit exists between the output terminal and the +24V supply.
• An open circuit is present in the load wiring.
• Faulty load not drawing current.

Click steps to track your progress.

1. 1

   Verify a load is physically connected to the digital output channel terminals (e.g., DO1, DO2).

2. 2

   Measure the voltage between the affected output terminal and the +24V supply to check for a short circuit.

3. 3

   Use a multimeter to check for continuity in the load wiring from the output terminal to the load's input.