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en:sw:01-mervis:analog-inputs-hidden [2018/10/11 10:31] mkudlacek created |
en:sw:01-mervis:analog-inputs-hidden [2021/08/05 12:22] (current) avsetula [Introduction] |
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| ====== Analog inputs ====== | ====== Analog inputs ====== | ||
| + | <WRAP group 100%> | ||
| + | <WRAP half column 81%> | ||
| + | In this tutorial, we are going to demonstrated how to use different modes of analog inputs. | ||
| + | </WRAP> | ||
| + | <WRAP half column 15%> | ||
| + | ;;# | ||
| + | <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> | ||
| + | ;;# | ||
| + | </WRAP> | ||
| + | </WRAP> | ||
| + | |||
| + | <WRAP center round box> | ||
| + | <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|24 V⎓ power supply]] | ||
| + | * Knowledge of how the [[en:automation:02-glossary:analog-inputs-hidden|analog inputs]] work on UniPi units | ||
| + | |||
| + | In this tutorial, we will use [[https://www.unipi.technology/cs/neuron-c2|Unipi Neuron]]. | ||
| + | </WRAP> | ||
| + | |||
| + | ===== Introduction ===== | ||
| + | The different analog inputs have different modes of operation, see [[en:automation:02-glossary:analog-inputs-hidden|Analog inputs]]. Change between modes in Mervis is done by configuring the Unipi module, therefor the **changes in modes cannot be done in the program** and the program has to be stopped during the configuration. | ||
| + | |||
| + | <WRAP center round info 80%> | ||
| + | The default mode of each input is "Voltage". | ||
| + | </WRAP> | ||
| + | |||
| + | ===== Changing between modes ===== | ||
| + | The changes are done on the prototype of the PLC or Extension. Double click on the prototype in the **Left panel**. The list of all available inputs and outputs will show up in the **Main Window**. Search for "AI_" and you will be presented with the list of all Analog input. | ||
| + | |||
| + | {{ :en:sw:01-mervis:analog-inputs-01-search-for-ai.png?direct |}} | ||
| + | |||
| + | To change the mode, select appropriate variable from the list, head over to the **Properties panel** and select the desired mode in the "Analog Type" property. | ||
| + | |||
| + | {{ :en:sw:01-mervis:analog-inputs-02-set-type.png?direct |}} | ||
| + | |||
| + | We just changed the configuration of the PLC modules, which is not applicable by simply uploading the solution. To save the configuration, follow the [[en:sw:01-mervis:unipi-configure-module-hidden|UniPi - Configure Module]] tutorial. | ||
| + | |||
| + | ===== Reading the input values ===== | ||
| + | Reading the input values for all modes is the same. Once you set the correct mode, you can just simple read a real value from the variable. The variable is called AI_X.Y depending on the Group (number X) and the position in the group (number Y). To include this variable into the program, you need to **[[en:sw:01-mervis:autogen-hidden|Set Autogen]]**. After that, you will see the variable in **Variable Browser** and you will be able to read it in the **Debugging** mode. | ||
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| + | <WRAP center round info 80%> | ||
| + | When reading the value of AO_X.Y in Voltage mode, the value is in volts (value 1.234 = 1.234 V⎓). When reading the value in Current mode, the value is in miliampers (value 3.145 = 3.145 mA). When reading the value in Resistance mode, tha value is in ohms (value 1012 = 1012 Ω) | ||
| + | </WRAP> | ||
