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Version: Deprecated Pages


This function is used in Python Scripting.


Adds a new tag in Ignition. You can add OPC, memory, expression, query, folder, and UDT instance tags. You can't add Client Tags, because those can vary from project to project.

Client Permission Restrictions

Permission Type: Tag Editing

Client access to this scripting function is blocked to users that do not meet the role/zone requirements for the above permission type. This function is unaffected when run in the Gateway scope.



This function accepts keyword arguments.

system.tag.addTag(parentPath, name, tagType, dataType, accessRights, enabled, value, attributes, parameters, overrides, alarmList, alarmConfig)

  • Parameters
    • String parentPath - The folder to add the tag to. Leave blank for the root folder.
    • String name - The name of the tag.
    • String tagType - The type of tag to create. Possible values are OPC, MEMORY, EXPRESSION, QUERY, Folder, and UDT_INST.
    • String dataType - The data type of the tag. Not used for UDT instances or folders.
      • Possible basic values are Int1, Int2, Int4, Int8, Float4, Float8, Boolean, String, DataSet, and DateTime.
      • Possible array values are Int4Array, Int8Array, Float8Array, BooleanArray, StringArray, DateTimeArray.
    • String accessRights - The access rights for a tag. Possible values are Read_Only, Read_Write, and Custom.
    • boolean enabled - If true, the tag will be enabled.
    • Object value - The value of the tag. Used for memory tags.
    • PyDictionary attributes - The tag's configuration attributes.
    • PyDictionary parameters - The parameters for a UDT instance tag.
    • PyDictionary overrides - All of the overrides for a UDT instance tag.
    • String alarmList - List of legacy alarms for the tag. The legacy alarm system was retired in 7.6.0, so the alarmConfig parameter should be utilized on newer versions.
    • PyDictionary alarmConfig - The alarm configuration for the tag. See editAlarmConfig for details on how to use this parameter.
  • Returns
    • Nothing
  • Scope
    • All

If called in the Gateway scope, a tag provider must be specified.

Associated attributes:

Complete list of the acceptable Tag Properties and alarmConfig.

Code Examples

Example #1 - Add OPC tag
system.tag.addTag(parentPath='', name="TagOPC", tagType="OPC", dataType="Int2",attributes={"OPCServer":"Ignition OPC-UA Server", "OPCItemPath":"[MLX]N7:0"})
Example #2 - Add OPC tag with two alarms
system.tag.addTag(  parentPath='',
attributes={"OPCServer":"Ignition OPC-UA Server",
alarmConfig={ "Alarm":[
["name", "Value", "Alarm"],
["setpointA","Value", 1.0],
["CustomEmailSubject","Value","My Subject"]
["name", "Value", "Alarm2"],
["parameterName", "Value", "newValue"],
["enabled", "Expression", "1=2"],
["CustomEmailMessage","Value","My Message"]
Example #3 - Add Folder
system.tag.addTag(parentPath='', name="Folder", tagType="Folder")
Example #4 - Add Memory tag
system.tag.addTag(parentPath='', name="TagMemory", tagType="MEMORY", dataType="Int2", value=25)
Example #5 - Add Memory tag with an Alarm using the alarmList parameter
alert = "myAlert;Medium_High;0.0;50.0;0;;;2.0;SEC$"

system.tag.addTag(parentPath = '', name = "TagMemory", tagType = "MEMORY", dataType = "Int2", value = 25, alarmList = alert)
Example #6 - Add Expression tag
system.tag.addTag(parentPath='', name="TagExpression", tagType="EXPRESSION", dataType="Int2", attributes={"Expression":"{[~]Tag1} * 20.5"})
Example #7 - Add Query tag
system.tag.addTag(parentPath='', name="TagQuery", tagType="QUERY", dataType="DateTime", attributes={"Expression":"SELECT CURRENT_TIMESTAMP", "SQLBindingDatasource":"MySQL"})
Example #8 - Add Memory tag to a provider other than the default tag provider
system.tag.addTag(parentPath="[ProviderName]Folder", name="TagMemoryProvider", tagType="MEMORY", dataType="Int2", value=42) 
Example #9 - Add UDT instance tag
# Before running this script, there must be a UDT named 'Motor'
# that has a string parameter 'DeviceName' and an integer parameter
# 'MotorNumber'.
system.tag.addTag(parentPath='', name="TagUDT", tagType="UDT_INST", attributes={"UDTParentType":"Motor"}, parameters={"DeviceName":"CLX", "MotorNumber":1})
Example #10 - Add UDT instance tag and override multiple parameters on status tag
# Before running this script, there must be a UDT named 'SecondUDT'
# that has a string parameter 'DeviceName', an integer parameter
# 'MotorNumber', and a tag named "STATUS".
system.tag.addTag(parentPath='', name="TagUDTParameters", tagType="UDT_INST", attributes={"UDTParentType":"SecondUDT"}, parameters={"DeviceName":"CLX", "MotorNumber":2}, overrides={"STATUS":{"ScanClass":"Default Historical", "Enabled":"false"}})
Example #11 - Add UDT instance tag and override the scan class of a tag inside of another UDT
# Before running this script, there must be a UDT named 'ThirdUDT'.
# ThirdUDT must contain a UDT 'SecondUDT',
# which has a string parameter 'DeviceName', an integer parameter
# 'MotorNumber' and a tag named "STATUS".
# Note the nested SecondUDT has the name 'Child_Instance' in the ThirdUDT.
system.tag.addTag(parentPath='', name="TagUDTScanClass", tagType="UDT_INST", attributes={"UDTParentType":"ThirdUDT"}, parameters={"Motor/DeviceName":"CLX", "Motor/MotorNumber":1}, overrides={"Child_Instance/STATUS":{"ScanClass":"Default Historical"}})
Example #12 - Create a memory tag with a type of DataSet, and pass in a dataset as the initial value of the newly created tag
# create an intial dataset to pass the tag
initData=system.dataset.fromCSV('"#NAMES"\n"Col 1"\n"#TYPES"\n"I"\n"#ROWS","1"\n"0"\n')

# create the tag
system.tag.addTag(parentPath='', value=initData, name="TagMemoryDataset", tagType="MEMORY", dataType="DataSet")
Example #13
# Example: Add an Array type Memory tag to the default tag provider

# create a dataset
dataset = system.dataset.toDataSet(["values"], [[1],[2],[3]])

# create the tag
system.tag.addTag(parentPath='', name="TagMemoryArray", tagType="MEMORY", dataType="Int4Array", value=dataset)