Extended properties help reduce the number of tags to create. If an individual tag is configured with extended properties, use the extended properties on this tag to display the name, description, engineering units, limits, and state values of the tag.

Extended properties include:

Name: The name of the tag or data type, limited to 40 characters.
Description: The description of the tag or data type, limited to 128 characters.
Engineering Units: The units of measurement, such as degrees Celsius, pounds, and pounds per square inch, associated with a tag or tag structure or array member. The Engineering unit is limited to 80 characters.
Minimum: The minimum (low) value of a tag or tag structure or array member. Use Minimum with the Maximum property to create a high and low limit for a DINT, INT, LINT, SINT, REAL, LREAL, UDINT, UINT, ULINT, and USINT tag. The Minimum property value must be less than or equal to the Maximum property value.
Maximum: The maximum (high) value of a tag or tag structure or array member. Use Maximum with the Minimum property to create a high and low limit for a DINT, INT, LINT, SINT, REAL, LREAL, UDINT, UINT, ULINT, and USINT tag. The Maximum property value must be more than or equal to the Minimum property value.
State 0: The State 0 identifier associated with the tag or tag structure or array member. Use State 0 with the State 1 property to describe two states of a BOOL tag. For example, State0 is Start and State1 is Stop for a status state. The identifier is limited to 80 characters.
State 1: The State 1 identifier associated with the tag or tag structure or array member. Use State 1 with the State 0 property to describe two states for a BOOL tag. The identifier is limited to 80 characters.

TIP: Values for LINT data type round up when value has more than 17 digits. For example, the value 92,233,720,368,547,758 is rounded up to 92,233,720,368,547,760.

The extended properties available for a selected tag depend on the data type of the tag.

The HMI device displays passed-through extended properties of aliased Logix Designer tags. Pass-through allows you to define the extended properties values on the definition. When you create an instance of the definition, the default definition values are passed through to instances in

FactoryTalk Optix

unless you explicitly define or override them on the instance. This behavior is supported for UDTs, AOIs, Arrays and the PlantPAx process instructions. You can define the following extended properties:

Description

Engineering Units

State0

State1

TIP:

Engineering Unit, State0 and State1 extended tag properties that have empty values are available when using online tag importing only. Specify a default value to make the property available for offline and online tag importing.

Extended properties for PlantPAx Process Instructions are available when using online tag importing only. Offline tag importing will be supported with a future version of Logix.

Creating projects

Provide Feedback

Have questions or feedback about this documentation? Please submit your feedback here.