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LOGO! - Hardware: Logic module 8 Continuous signal Inputs Located At low volts.

Hello everyone,
Im hoping for some advice. I have a LOGO8 12/24v unit and I have been using the analog input options. I have found that when the voltage drops below around 0.3 volts the readings become unstable and start to jump around. I have discovered this whilst trying to use LM35 sensors but have also tested with a voltage signal generator which holds a stable reading until <0.3 volts again.
Is the LOGO able to read mV at a low level reading?

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