Safety Output Short Circuit to Ground Diagnostic Active

What does Short Circuit to Ground diagnostic mean?

This diagnostic indicates a short circuit specifically from a safety output point to ground. When detected, the module faults and turns off the output to ensure a safe state.

• Output point Ptxx wiring shorted to the system ground due to insulation breakdown, mechanical damage, or improper termination.
• Connected load device internally shorted to ground.

Click steps to track your progress.

1. 1

   Identify the specific output point Ptxx where the fault is detected via Studio 5000 Logix Designer diagnostics.

2. 2

   Examine the physical wiring connected to output point Ptxx for any damage or direct contact with system ground (e.g., conduit, chassis).

3. 3

   With power removed from the module and field devices, use a multimeter to measure resistance between the output terminal Ptxx and system ground; expect an open circuit (high resistance).

4. 4

   Ensure the short condition is physically removed from the circuit; the diagnostic automatically resets to '0' once the condition clears.