Rockwell Automation 2711-ND3 PanelBuilder v2.60 Software User Manual - Manual (Page 161)

10–9 Creating Data Entry Controls
Publication 2711-6.0
Display
The Display area defines properties of the data that displays in the
numeric entry object.
Display Tag specifies the name of the tag address from which to read
the display data. Usually, the write tag and display tag are the same.
One-directional protocols, such as DeviceNet, however, require
different addresses for the Display tag and Write tag. The Write tag
is an input and the Display tag is an output.
Data displayed in a numeric entry object may or may not be scaled.
•
To display the entered value regardless of the value stored at the
controller, don’t enter a display tag (leave field blank).
•
To display a non-scaled value (not the entered value), use
different tag names for the display and write tags. Both tags
should have the same tag address but the display tag shouldn’t
have scaling.
•
To display an entered value based on the value stored at the
controller, use the same tag name for the display and write tags.
Because of rounding, the displayed value may not be identical to
the entered value.
Scaled (x - (-10)) .5
scale = 2
offset = -10
Scaled ((2) (8) + ( -10))
scale = 2
offset = -10
Entered Value = 5 Displayed Value = 6
Terminal Value = 8
(rounded)
Except for floating point values, the controller only stores integer
values, the scaled result of 7.5 is rounded to 8. The same scale
used for data entry is used to convert the rounded value for
display.
Fill with Zeroes specifies whether zeroes are entered in unused entry
positions to the left and right of the decimal point. For example, if
the value 32100 is entered (fixed decimal point position = 2):
0 0 0 3 2 1 . 0 0 _ _ _ 3 2 1 . 0 0
Zero Filled No Fill