Variable Functions
Variable functions are used to read/write variables defined in the inSCADA Platform with script expression.
Get Variable Value
object ins.getVariableValue(var variablename)
Reads the value of a variable defined in inSCADA.
variablename : String
Return Value: Returns the Variable object. If the value returned is "null", it means the operation failed. Variable could not be read.
Syntax
var variable=ins.getVariableValue("UNIT01_Active_Power");
if (variable!==null) {
if (variable.value>0) {
ins.notify("info","Unit 01","Unit 1 is working");
}
return variable.value;
}
return -1;
Get Variable Previous Values
object ins.getVariableValue(var variablename,var index)
Reads the value of a variable defined in inSCADA from previous scans. inSCADA stores the last 10 readings of the variables. You can reach these 10 values with index.
variablename : String
Return Value: Returns the Variable object. If the value returned is "null", it means the operation failed. Variable could not be read.
Syntax
var variable=ins.getVariableValue("UNI01_Active_Power");
if (variable===null) {return -1}
var prv_variable=ins.getVariableValue("UNIT01_Active_Power",1);
if (prv_variable===null) {return -1}
if (variable.value!==prv_variable.value) {
ins.notify("info","Unit 01","Power value is changed");
}
return variable.value;
Get Variables Values
Array[] ins.getVariableValues(var variablenames[])
Reads the values of the requested variable list defined in inSCADA.
variablenames[] : String array
Return Value: Returns an array of objects of the requested variables.
Syntax
var TAGS=["UNCORRECTED_FLOW_RATE",
"MASS_FLOW_RATE",
"CORRECTED_FLOW_RATE",
"ENERGY_FLOW_RATE",
"INDICATED_UNCORRECTED_FLOW_RATE",
"UNCORRECTED_TOTAL",
"MASS_TOTAL",
"CORRECTED_TOTAL",
"ENERGY_TOTAL",
"INDICATED_UNCORRECTED_TOTAL",
"CONVERTION_FACTOR",
"CORRECTED_FACTOR",
"LINE_COMPRESIBILITY",
"BASE_COMPRESIBILITY",
"LINE_PRESSURE",
"LINE_TEMPERATURE",
"LINE_DENSITY",
"BASE_DENSITY"];
var VALUES=ins.getVariableValues(TAGS);
if (VALUES===null) {return -1;}
var mass_flow_rate_value=VALUES[1].value;
var mass_flow_rate_timestamp=VALUES[1].date;
Get Project Variables
object ins.getProjectVariableValues()
Reads the value of all variables connected to the project in inSCADA .
Return Value: Returns a JSON object with all variables and values for the project.
Syntax
var result=ins.getProjectVariableValues();
if (result!==null) {
result;
}
return -1;
Set Variable Value
ins.setVariableValue(String variablename, object value)
Writes a value to a variable defined in inSCADA.
variablename: The name of the variable to write the value to.
Syntax
ins.setVariableValue("UNIT01_Active_Power_Set",{value:100});
Set Variables Values
ins.setVariableValues(object variables)
Writes values to variables defined in inSCADA at once.
variables: A JSON object containing variables and the values to be written.
Syntax
ins.setVariableValues(obj);
Map Variable Value
ins.mapVariableValue(String source, String destination)
Writes a variable value to another variable.
Source: The variable name of the value to be read. A source variable.
Destination: Name of the variable to be write the value. A target variable.
Syntax
ins.mapVariableValue("UNIT01_Active_Power","UNIT01_Active_Power_Set");
ins.mapVariableValue(String source, String destination, var defaultvalue)
If the source variable cannot be read, it writes a default value to the target variable.
ins.mapVariableValue("UNIT01_Active_Power","UNIT01_Active_Power_Set",-1);
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