Short Circuit to Ground / Overload

What does DIAG_10 (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 '10'. This indicates either a short circuit exists between the output and ground or an overload condition on the output channel. This state protects the module from damage but prevents the output from operating.

• A short circuit exists between the output terminal and ground.
• The current drawn by the connected load exceeds the module's specified output current rating (overload).
• A faulty load is causing excessive current draw.
• Internal short within the wiring to the load.

Click steps to track your progress.

1. 1

   Measure resistance between the affected output terminal and ground to detect a short circuit.

2. 2

   Check the current drawn by the connected load and compare it to the module's specified output current rating.

3. 3

   Disconnect the load from the module and verify if the diagnostic bits clear, then test the load separately.

4. 4

   Inspect the wiring for any physical damage or insulation breakdown that could cause a short to ground.