Create discrete tags

You can specify discrete tags to show the binary state of internal processes running in an InTouch application. A discrete tag must be assigned an initial value of on or off. Also, you can specify messages that appear in the alarm event window when the process associated with the tag transitions into or out of an alarm state.

The following steps show how to define a memory discrete tag. I/O discrete tags indicate the binary state of all inputs and outputs from programmable controllers, process computers, and data from network nodes.

For more information about setting the properties of an I/O discrete tag, see Specify a discrete I/O Tag.

Define an initial value and messages for a memory discrete tag

1. Select Memory Discrete as the type of tag in the Tag Types dialog box.

2. Select Details at the top of the Tagname Dictionary dialog box to show the detail options. The detail portion of the Tagname Dictionary dialog box appears.

   

3. Select On or Off as the initial value associated with the tag. The tag is set to this initial value when the application starts.

4. Enter messages in the On Msg and Off Msg boxes that appear when the tag transitions in and out of an alarm state.

   These messages are available for use in any animation link or script, regardless of whether the tag has alarms configured or not.

   • If you define a discrete alarm that is active when the tag value is equal to 1 (On, True), the message entered in the On Msg box appears in the Value and Limit columns of your ActiveX alarm displays.

     When the tag’s alarm state returns to normal, the message entered in the Off Msg box appears in the Value column and the On message remains in the Limit column.

   • If you define a discrete alarm that is active when the tag value is equal to 0 (Off, False), the message entered in the Off Msg box appears in the Value and Limit columns of your ActiveX alarm displays.

     When the tag’s alarm state returns to normal, the message entered in the On Msg box appears in the Value column and the Off message remains in the Limit column.

5. Save your changes to the tag.