Digital Control Tag Type Properties: I/O Tab
The I/O Tab contains properties used to identify and establish a connection to the communication driver tag being used to exchange data with your physical I/O device (e.g. PLC or RTU), or to the polling driver responsible for determining the order and rate at which data polls will occur.
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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.
Provide the address within I/O device to which this tag is to write data. This value must match the configuration of your PLC or RTU hardware.
The addressing system for each of the drivers that come with VTS is provided in the Communication Driver Tags section of this guide.
If you are using a pulsed signal, enter the duration of the pulse here in seconds or decimal parts of a second. In the case of pulsed outputs, the value of this tag is 1 while the attempted control is in progress (i.e. for the length of the pulse).
If the value of Pulse Duration is 0 or blank (Invalid), then a constant value will be written to the I/O device.
Note: The existence of an output tag is not sufficient to write values to the I/O device; it is the drawing method and the properties you configure for that drawing method that determine the manner in which data is written to the I/O device.
The value output by the control can be supplied by a data source. For a digital control, the values supplied by the data source should be limited to 1 or 0 (true or false).