Differences

This shows you the differences between two versions of the page.

--- en:sw:01-mervis:analog-outputs-hidden [2020/05/15 06:18]
avsetula
+++ en:sw:01-mervis:analog-outputs-hidden [2024/04/15 13:55] (current)
avsetula [Measuring resistance (temperature)]
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 ====== Analog outputs ======
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 In this tutorial, we are going to demonstrated how to use different modes of analog outputs.
 Since some analog outputs are able to measure resistance, we will demonstrate how to directly transform measure values of resistive thermometers into temperature.
-===== Prerequisites =====
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+;;#
+<html><span class="dev-tag dev-patron">Patron</span></html> \\
+<html><span class="dev-tag dev-neuron">Neuron</span></html> \\
+<html><span class="dev-tag dev-axon">Axon</span></html> \\
+<html><span class="dev-tag dev-extens">Extension</span></html>
+;;#
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+</WRAP>
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+<html><span class="kbBlue-H4alt">Prerequisites:</span></html>
   * UniPi controller running Mervis OS
   * Basic project with attached controller a program in FBD mode
-  * [[https://www.unipi.technology/power-supplies-c15|24V power supply]]
+  * [[https://www.unipi.technology/power-supplies-c15|24 V⎓ power supply]]
   * Knowledge of how the [[en:automation:02-glossary:analog-outputs-hidden|analog outputs]] work on UniPi units
 In this tutorial, we will use [[https://www.unipi.technology/unipi-neuron-l503-p105?categoryId=10|Unipi Neuron L503]].
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 ===== Introduction =====
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- The default mode of each output is "Voltage" and the output value is set to 0V.
+ The default mode of each output is "Voltage" and the output value is set to 0 V⎓.
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-When setting the value of AO_X.Y_w in Voltage mode, the value you enter is in volts (value 1.234 = 1.234V). When setting the value in Current mode, the value you enter is in miliampers (value 3.145 = 3.145mA)
+When setting the value of AO_X.Y_w in Voltage mode, the value you enter is in volts (value 1.234 = 1.234 V⎓). When setting the value in Current mode, the value you enter is in miliampers (value 3.145 = 3.145 mA)
 </WRAP>
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 The analog output on Group 1 of Neuron and Axon (AO_1.1) is able to measure resistance as well /* FIXME (check the documentation na mereni odporu do Automation 101 -> How to's) */. To set the AO_1.1 to the Resistance measurement mode, follow the configuration steps above.
-The resistance measurement is mostly used for measuring resistive thermometers such are Pt100, Pt1000, Ni1000,... Those sensors have known temperature vs. resistance curve and Mervis can directly transform the measured values into degrees of Celsius. This transformation is done on the property of the "write" variable, as with all the previous changes. Look for the property "Transform" in the **Properties panel**. The default value is "identity", which means the variable will always contain the measured resistance in Ohms. You can change the transformation to "ResistanceToTemperature" and box with other options will appear underneath. All you need to do is to change the "Kind" to the type of the resistive thermometer you are trying to read from. You can leave all the other parameters as is. And as with all the changes to the configuration of the PLC, [[en:sw:01-mervis:unipi-configure-module-hidden|apply it]] as we did above.
+The resistance measurement is mostly used for measuring resistive thermometers such are Pt100, Pt1000, Ni1000,... Those sensors have known temperature vs. resistance curve and Mervis can directly transform the measured values into degrees of Celsius. This transformation is done on the property of the "read" variable, as with all the previous changes. Look for the property "Transform" in the **Properties panel**. The default value is "identity", which means the variable will always contain the measured resistance in Ohms. You can change the transformation to "**ResistanceToTemperature**" and box with other options will appear underneath. All you need to do is to change the "Kind" to the type of the resistive thermometer you are trying to read from. You can leave all the other parameters as is. And as with all the changes to the configuration of the PLC, [[en:sw:01-mervis:unipi-configure-module-hidden|apply it]] as we did above.
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 **Note:** apply the transformation only to the __analog output read__ data point (AO_x.xx_r), not to write (AO_x.xx_w).
 </WRAP>
-{{ :en:sw:01-mervis:analog-outputs-05-tranform-kind.png?direct |}}
+{{ :en:sw:01-mervis:analog-outputs-read-resistivity_transform.png?direct |}}