====== Analog output ======

{{en:mervis-ide:35-help:aoi.png}}

===== Full Name =====

AO/I (AO + Pt1000)

===== Library =====

LIB\Unipi

===== Version =====

V1.1

===== Description =====

==== Important ====

This function block is no longer needed since IDE 2.1.x and OS v1.6, its functionality has been moved into newly created datapoints AO_1.01 and AO_1.01_measureR. The mode of output/measurement is set as proprty on datapoint AO_1.01.


----

This block simplifies work with **Analog output 1.1 (AO1.1)** as Voltage and Current output and also as Analog input for Resitance measurement at **all Neuron models** and at the follwing moedls of **Axon - S105, S115, S155, M205, M505, L205, L505**. This block also calculates temperature in Celsius from the Pt1000 sensor connected to the AO.

Options:

  * Analog output - Voltage
  * Analog output - Current
  * Analog input - Resistance measurement 0-2kÔäŽ
  * Analog output - Pt 1000 (temperature) - AO is switched to resistance measurement + measured resitance is converted to temperature in Celsius degrees according to the Pt1000 resistance curve

To save the configuration it is necessary to write log. 1 to the **_NVsave_1** in the variable browse while in Debug mode. **Please note: This operation saves the actual state of all output including AO, relays. DO, to startup config!**

Since firmware v5.0 (variables Vref_1 and so on has value 0) this block is not necessary and its only needed to write to AO_mode and AO_1. However it can be used, backwards compatibility is preserved.

\\


===== Inputs =====

|Input            |Type                             |Description                                                                               |
|mode             |Voltage/Current/Resistance/Pt1000|Mode configuration (AO - Volts/Amperes, AI - Resistance, Temperature.                     |
|target_value     |REAL (0-10V, 0-20mA)             |Value to be set to the output when used as analog output in [V] or [mA]. Otherwise unused.|
|Vref_1           |INT                              |Must be connected to the generated HW global variable VRef_1 of the device.               |
|VrefInt_1        |INT                              |Must be connected to the generated HW global variable VrefInt_1 of the device.            |
|A0_A_DEV_1       |INT                              |Must be connected to the generated HW global variable A0_A_DEV_1 of the device.           |
|AO_A_Offset_1    |INT                              |Must be connected to the generated HW global variable AO_A_Offset_1 of the device.        |
|A0_V_DEV_1       |INT                              |Must be connected to the generated HW global variable A0_V_DEV_1 of the device.           |
|AO_V_Offset_1    |INT                              |Must be connected to the generated HW global variable AO_V_Offset_1 of the device.        |
|AIO_1            |INT                              |Must be connected to the generated HW global variable AIO_1 of the device.                |
|AIO_V_Offset_1   |INT                              |Must be connected to the generated HW global variable AIO_V_Offset_1 of the device.       |
|measuring current|INT                              |Setpoint of the measurement current for resitance/Pt1000. Default value 1mA.              |

===== Outputs =====

|Output     |Type|Description                                                                             |
|AO_mode    |INT |Mode of the AO. Must be connected to the generated HW global variable AO_mode.          |
|AO_1       |INT |Analog output of group 1. Must be connected to the generated HW global variable AO_1.01.|
|Resistance |Real|Measured value in Ohms.                                                                 |
|Temperature|Real|Calculated value of the measured current to temperature in Celsius degrees.             |

===== Use case =====

{{en:mervis-ide:35-help:aoi_en.png}}