Digital output problem
I am using neuron S with raspberry pi 4. I noticed that I was unable to control DO2 and DO3 whereas DO1 and DO4 works correctly.
I checked resistance of each digital output. Resistances between DO GND <> DO2 and DO GND <>DO3 are very low (~ 50 ohm) whereas DO GND <>DO1 and DO GND <>DO4 are high.
Did I break hardware ? If yes, can I send it to repair or can I fix it ?
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When making a complaint or repair, follow the complaint procedure: https://www.unipi.technology/return
In this case, however, it may not be a faulty HW, but only an inappropriate output setting:
- The digital outputs on the Unipi units also enable the so-called PWM mode, where the output is controlled in a different way than during normal on / off switching.
- Another function that could affect the outputs in this way is the so-called DirectSwitch function.
If you work in Mervis SW, you can upload the default configuration simply by creating a new project in the Mervis IDE, assigning a PLC and uploading the Unipi module configuration.
For other SW solutions, I recommend checking the values in the Modbus registers.
- To check that PWM is off, check registers 16 to 19, all of which should contain a value of 0.
- To check that the DirectSwitch function is turned off, check register 1014, it should also contain the value 0.