Problems reading voltage level on analog inputs A0 and A1

[edgar.guerra]

good evening
I have problems reading the voltage of a sensor from 1v to 5 v, the analog inputs do not receive any data and I already verified that the jumpers were in the correct position

[Flex727]

It might be helpful if you mentioned what hardware you were using and how you configured it in the software and how you wired it.

[bobnorway]

Remember to use a good ground between your analog signal source and the plc unit.

[edgar.guerra]

On 18/2/2021 at 17:06, Flex727 said:

Podría ser útil si mencionara qué hardware estaba usando y cómo lo configuró en el software y cómo lo conectó.

I am using a unictronics PLC v130 tr6. I could not find the form to read the pressure sensor that gives readings in voltage

[edgar.guerra]

On 20/2/2021 at 6:01, bobnorway said:

Recuerde utilizar una buena conexión a tierra entre su fuente de señal analógica y la unidad de plc.

the sensor is powered by the same source as the PLC

[Flex727]

Moved to the correct forum.

Your V130 has 10-bit analog inputs. That means the 0-10V input will be read as an integer from 0-1023 and placed in the register you assign in the Hardware Configuration (you have MI 26 and MI 3 for analog inputs 0 & 1, respectively). You can convert that from 0-1023 to 0-10V by using the Linearization function in ladder.

Also, be sure your jumpers are set correctly for the inputs. An Installation Guide should have come with your PLC, but you can also find it in PDF form on the Unitronics website.

[edgar.guerra]

good morning
I have not been able to use these inputs as voltage readers, arrange the jumpers according to the manual but the allocated memory does not present any byte regardless of the voltage change, my having the same ground between the plc and the sensor.

 

[Flex727]

Have you confirmed with a voltmeter that you actually have voltage present? Have you confirmed that your wiring is exactly as specified in the installation document that came with your PLC?

[edgar.guerra]

Hace 44 minutos, Flex727 dijo:

¿Ha confirmado con un voltímetro que realmente tiene voltaje presente? ¿Ha confirmado que su cableado es exactamente como se especifica en el documento de instalación que vino con su PLC?

Hace 44 minutos, Flex727 dijo:

¿Ha confirmado con un voltímetro que realmente tiene voltaje presente? ¿Ha confirmado que su cableado es exactamente como se especifica en el documento de instalación que vino con su PLC?

El 21/4/2021 a las 12:18, Flex727 dijo:

Dependerá de lo que active esa salida. Si se trata de una bobina SET, utilice la función de encendido para RESTABLECER la salida. Si se trata de una bobina directa, necesitará un código para evitar que la bobina se active al encenderla.

 

[edgar.guerra]

The wiring is fine, even at this moment it is reading another humidity sensor from 4 to 20 ma in the last analog outputs and the sensor is effectively delivering a voltage of 0 to 5

[Isakovic]

Did you use MI3 and MI26 anywhere else in the program? Could it be that values are overwritten somewhere in your application?

[edgar.guerra]

I am only interested in MI3 and I only use it for linearization, when it is reading current it does not present problems, it is when it reads voltage that it does not receive a signal. my problem is that I have never been able to use those analog inputs using voltage nor can I find an example where they do it in this v130 tr6

[TozoM8]

Do you have jp5 on B and jp3 on A?