7.13 Diagnostics
7.13.1 I/O Point Health Status
Each I/O point on the module has an associated health status. The health of each point is continuously monitored and marked
unhealthy for the following conditions (and a per-point diagnostic alarm is generated):
• For mA inputs
− if the user-defined Min/Max mA limits are exceeded.
− if the currents through the burden resistor exceed 30 mA
• For voltage inputs, if the hardware input limits are exceeded
• For RTD inputs
− if the input value exceeds the maximum or is below the minimum temperature range of the selected device
− if the expected data received is missing or invalid.
− if hardware limits are exceeded
• For each TC input
− if the input value exceeds the maximum or is below the minimum temperature range of the selected device
− if the temperature value is calculated using an extrapolated range beyond the device temperature curve table.
− if the input voltage exceeds the HW input limits of -40 mV to 114 mV.
− if the input is open, no sensor connected (burnout detection).
• For mA outputs
− if commanded current exceeds the hardware limits
− if current output feedback (from sense resistor) does not match the commanded current
• For Digital Inputs
− if input voltage exceeds HW max or min limits
− if an open wire is detected when using line monitoring
− if a short is detected when using line monitoring
− if sensor fault is detected when using a NAMUR input
• For Pulse Accumulator Inputs
− if input voltage exceeds HW input limits of -11 V to 21 V
7.13.2 I/O Status LEDs
The following I/O status LEDs are driven by the I/O pack firmware. For common BPPC processor LEDs, refer to the section
Common I/O Module Functionality.
Channel Number Color Status
1–16
Green Assigned/healthy
Red Unhealthy or point initialization in progress
Not Lit Channel not used
Note Refer to the illustration of the I/O pack faceplate in the section Mark VIeS YUAA Universal I/O Pack for the I/O status
LEDs.
YUAA Universal I/O Modules GEH-6855_Vol_II System Guide 213
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