Use an 'Equipment.Item' Reference
- Last UpdatedJul 18, 2023
- 2 minute read
You can reference a variable tag using 'equipment.item' instead of a tag name.
For example, an equipment type named "Motor" includes the item "FailStart". FailStart includes a variable tag definition that links to an I/O point on the physical motor. To refer to this variable tag, you can use "Motor.FailStart" instead of the tag name. (For more information, see Items.)
To do this, use the following syntax:
[Cluster.]Equipment.Item[.ExtItem]
Where:
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Cluster |
The cluster name (optional). |
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Equipment.Item |
A substitution for a tag name using an "equipment.item" reference. |
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ExtItem |
The Tag Extensions item name (optional). If the item name is not specified, the value of the property is referenced. |
This means you can:
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Use equipment.item in place of variable tags in all expression fields in graphic pages.
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Use equipment.item to reference variable tags in Genie and Super Genie substitutions.
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Use equipment.item in the value field to represent a variable tag when associating super genie substitutions via metadata.
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Pass equipment.item to Cicode functions in which the variable tag name is an argument.
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Pass equipment.item to CTAPI functions in which the variable tag name is an argument.
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UNINTENDED EQUIPMENT OPERATION If you update the Equipment Name or Equipment Item for a variable tag and restart the I/O Server, these changes will not be automatically reflected in tag references in Equipment.Item syntax within the system. After updating the Equipment or Item name for a tag, restart all servers and clients in the system. Failure to follow these instructions can result in death, serious injury, or equipment damage. |
Note: You can also access alarm data in a similar way. See Use Alarm Properties as Tags.