Measurement underflow at the I/O module

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The input measurement on a safety I/O channel has fallen below its minimum detectable range. This can be due to an under-range signal from the sensor, incorrect wiring, or an issue with the sensor's power supply. For AI581-S input channels, the internal detection mechanism might not differentiate between over- and undercurrent effectively, as overcurrent can be followed by undercurrent effects in the electronics. This is a severity 3 error.

• Input signal falls below the minimum measurable range of the I/O module.
• Underload condition or open circuit on the analog input.
• Incorrect scaling of input signal.
• Wiring error causing insufficient voltage.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Check the channel wiring for correct connections and ensure the sensor output range matches the I/O module input specifications.

2. 2

   Verify the power supply to the sensor connected to the channel, ensuring it is within the specified operating voltage.