AIO Module Range / Scaling Problem
Posted: 23 Sep 2021, 18:16
I have bought a RevPi Core 3+ and 2 AIO modules, and everything is fine.
But, the AIO spec says that a 4-20ma input (or other) is 16 bit. And the Outputs are 15 bit.
But, for example, I have to send (output 4-20ma) a value of 4000 – 20000 (integer) to the process image. This means I have a range of 16000. So, I lose 1 bit resolution on the output. Same, but worse, for inputs.
Does anyone know of a way that I can drive full scale to the ADC, DAC converters (0-65535, 0-32767) in the process image, please?
Thanks for your help, Loz.
But, the AIO spec says that a 4-20ma input (or other) is 16 bit. And the Outputs are 15 bit.
But, for example, I have to send (output 4-20ma) a value of 4000 – 20000 (integer) to the process image. This means I have a range of 16000. So, I lose 1 bit resolution on the output. Same, but worse, for inputs.
Does anyone know of a way that I can drive full scale to the ADC, DAC converters (0-65535, 0-32767) in the process image, please?
Thanks for your help, Loz.