Selector Switch Tag Type Properties: I/O Tab
The I/O Tab includes properties used to identify and establish a connection to the communication driver tags being used to exchange data with your physical I/O device (e.g. PLC or RTU). This is accomplished by identifying the communication driver tag that is linked with the physical I/O device.
In addition, the I/O tab also provides a means of selecting tags or expressions that are to provide feedback for the state of the equipment or external control over the switch position.
In the case where each position of the switch writes to a different output address, you can deselect the "Use Single Output Address" box, and provide a value that will be written to each address not matching the current switch position. Note that values will be written in a "make before break" order. In other words, the value for a new switch position will always be written before the value-when-off is written to the addresses matching the unselected switch positions.
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Select the communication driver tag to which data will be written.
The tag button to the right of the field opens the tag browser, from which you can either select an existing communication driver tag or add a new one. The X button will clear the field. Right-clicking on a tag in the field will open a dialog from which you can the driver`s properties.
Select the tag or expression that has been configured to provide feedback indicating whether the control action of this switch has been successful. “Success” means that the state of the equipment matches what is expected for a given switch position.
The next panel, Positions, provides a field where you can specify the expected feedback value for each position of the switch.
[Optional] Select the tag that has been configured to drive the current position of the tag. The value being returned should be an integer corresponding to a switch position number.
Available only when the Use Single Output Address option has been un-checked. The value provided here will be written to the addresses of the unselected switch positions after the current position's value has been written.
This checkbox provides an option to use a single output address for all switch positions, or to allow a separate address for each position. NOTE: Addresses are specified on the next tab, Positions.