Scaled data output from AI Read floats to maximum after switching relay

[zand]

Relay turns off motor. Sensor data read from MAX remains normal, same data read with AI READ jumps to negative value then floats to maximum value over >10 seconds. I am using LabVIEW 7.1 with an SCXI-1000. Re-running AI Config and AI Start resets the data to realistic levels (matching those read by MAX). Is there an error in using AI Read with LabVIEW 7.1?

[tbob]

Sounds like your AI input is unterminated. Unconnected input will cause input reading to drift/float. Check connections, contacts, wiring, relays, etc...