vamalgise Posted March 29, 2017 Report Share Posted March 29, 2017 Hello, I operate 3 way control valve with 0...10V signal with analog output of IO-AI4AO2. I linearize 0...100% signal from PID out to 0...4095 bit to analog output. When PID signal is 0 and output is 0, i measure voltage in AO0 of IO-AI4AO2 and there is 9,3 V, when i give 100% signal, there is 14,4V on the output. Obviously valve does not operate properly. One more curious thing is that when PID out signal is more than 0, fault LEDs on the module start blinking ( AO short circuit and AI out of range) with specific frequency, like once in 5 seconds lets say analog input 0 goes to high limit value. What could be the problem? Could it be some noise? Thank you in advance guys. Quote Link to comment Share on other sites More sharing options...
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