Open Wire Detection (Current Input)

What does I.Chxx.OpenWire (Current mA) mean?

This tag indicates that a wire is disconnected from input channel xx when operating in Current (mA) mode, specifically detected when the input signal falls below 100 μA. This condition concurrently sets the I.Chxx.Fault tag, indicating untrusted data, and requires physical inspection of the wiring. Open Wire Detection must be enabled in the module configuration.

• Physical disconnection or break in the input wire connected to channel xx.
• A fault in the current loop external to the module causing the signal to drop below 100 μA.

Click steps to track your progress.

1. 1

   Verify the physical wiring at input channel xx terminals for proper connection and integrity.

2. 2

   Measure the current at the input channel xx to confirm it is above 100 μA when the circuit is closed.

3. 3

   Ensure Open Wire Detection is enabled in the module configuration (refer to page 98).