This window enables you to assign a channel to a specific instrument tag and thus effect an I/O assignment.
To access the I/O Assignment window, select the I/O terminations or I/O cards in the Domain Explorer and then do one of the following:
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In the Domain Explorer, right-click an I/O card or I/O termination and then on the shortcut menu, select Actions > I/O Assignment.
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In the Wiring module, select Actions > I/O Assignment.
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Select on the Wiring module toolbar.
To open the Wiring Explorer in the I/O Assignment window, select beside the I/O card list.
Tag list (left pane)
I/O type
Allows you to select a I/O type of the instrument tag. The instrument tag I/O type shown in this field should match the I/O type of the terminal strip you selected in the I/O termination list. If the I/O type of the selected terminal strip is MIXED, the Tag number I/O type field becomes a list from which you can select an appropriate instrument tag I/O type. You can also select another I/O type if you set your I/O Assignment Wiring preferences to All I/O types.
Sort by
Allows you to select an option to sort the data in the left panel according to tag numbers or control system tags.
Find tag number
Allows you to type a name of a control system tag that you want to find in the Control System Tag column.
Tag Coupling Data Window
The tag coupling data window on the Tag list pane of the I/O Assignment window allows you to assign tag numbers to control system tags. This procedure is referred to as coupling.
Tag Number
This column lists all the available tag numbers for the current I/O card. If a control system tag appears next to a tag number, this means that this tag number has been coupled with that control system tag. To couple an selected uncoupled tag number with a free control system tag, on the module toolbar, select .
To effect I/O assignment, select a coupled tag number and drag it to an appropriate free channel in the Channel assignment data window on the right.
Control System Tag
This column lists all the available control system tags. Coupled control system tags appear next to tag numbers. Uncoupled control system tags appear next to a blank Tag Number field. To create a new control system tag, on the module toolbar, select .
Assignment details (right pane)
Note that some of the labels listed below may vary with your definitions for this panel. This is so because these labels are panel manufacturer-specific and they are set on the Panel Manufacturer dialog.
I/O termination
Allows you to select a terminal strip. To add other terminal strips to this list, select beside the list to open the Wiring Explorer.
Address 1
Displays the first panel address.
Address 2
Displays the second panel address.
Cabinet
Displays the panel that holds the current I/O card.
Rack
Displays the rack that holds the current I/O card.
Slot
Display the rack slot of the current terminal strip.
Channel Assignment Data Window
The channel assignment data window on the I/O card details pane is where you implement I/O assignment, by dragging instrument tags couple with control system tags to this data window. If you drag an uncoupled tag number, Smart Instrumentation prompts you to create a control system tag for the tag number. To cancel the I/O assignment of highlighted coupled tags, on the module toolbar, select .
Channel
Displays the channel names in the current I/O card. To edit channel properties, in this data window, select the channels you need and select on the toolbar or select Actions > Channels.
Address
Displays the channel software address. To open a dialog where you edit this field, select Actions > Channels.
Control System Tag
Displays the control system tags coupled with tag numbers that are assigned to channels. To rename a selected control system tag, on the module toolbar, select .
Tag Number
Displays the tag number assigned to each channel.
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When working in a project, the software displays assigned channels that belong to other projects or to As- Built. These channels are displayed in red and there is an information icon to the left of the channel name. You can select the information icon to open the Channel Status Information dialog to see which project the current channel has been claimed for.
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When in a Project, the I/O assignment task is enabled for panels with inactive I/O cards, as long as one of the channels under the I/O card is active. When the I/O Assignment window opens, all the channels are listed (active and inactive). The inactive channels are shown in grey, and cannot be assigned.