Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 171)

7–50 Creating Messages
Publication 2706-817
Function key tags
Write Tag: Select a write tag from the list box or type in a new
Write Tag name. A write tag is required for each enabled Function
key. The only valid data type for a Function key Write tag is bit
type.
The write tag is the address location used by both the MessageView
terminal and the logic controller to reflect the On or Off state of the
Function key.
Handshake Tag: If a Latched Function Key was selected under
Type, select a handshake tag from the list box or type in a new
Handshake Tag name. This option is greyed out for Momentary and
Maintained Function Keys. The only valid data type for a Function
key Handshake tag is bit type.
The value at this tag address is set/reset by the controller. When the
bit is set, the terminal releases the Latched Function Key, and it
returns to its initial state.
Indicator Tag: The indicator tag is a read-only tag in the Function
Keys dialog. It is discussed in the section on LED attributes on Page
7–52.
To edit the Write or Handshake tag attributes:
1. Put the insertion pointer in the tag box.
2. Select the Edit Tag button to bring up the Tag Form dialog:
3. Edit the tag’s attributes (see the section starting on Page 8–2).
4. Select OK.
ASCII Triggering devices
Tag Node Name and Address attributes are ignored by an ASCII
Triggering device. They may be omitted when creating applications
for use with such a device.