Issue
Clarification on linking rules within the Niagara R2 platform and restrictions when linking objects between stations.
Product Line
TAC IA SeriesEnvironment
Niagara R2 platform
Cause
Users need guidance on correct linking practices to ensure proper functionality and avoid unsupported link types.
Resolution
General Linking Rules
- Properties must share the same data species for a valid link.
- A link connects one object's output to another object's input.
- The Link Editor enforces these rules during selection.
Exceptions for Gx Objects
- Gx objects (e.g., GxText) have only inputs and can link to internal configuration properties or most outputs.
- These links are UI links, not part of control logic, and are used for interface display.
Multiplicity Rules
- One-to-many: Multiple inputs can link to a single output.
- Many-to-one: Only allowed for
priorityArrayortriggerTypeinputs (or certain Lon properties).
External Link Restrictions (Between Stations)
- Links between prioritizedOutputs and priorityArray inputs are not permitted.
- Links involving triggerType data species are disallowed.
- GxText objects cannot link to internal properties of another object externally (only inputs/outputs are available).
