48
<DT
n,string
>
Define Tag
Mapped Variables
Description
Set Tag information to be displayed next to the input variable on standard screens
Parameters
n
= 1 to 8
- the input variable number
IN_1
to
IN_8
string
-
any 7-bit ASCII string up to 16 characters long
Initial Value
“Inst1_Tag”, “Inst2_Tag” … “Inst8_Tag”
Once changed, these settings are retained in non-volatile memory
Modes
All, when showing Standard Screens
Notes
Each of the eight process variables may be displayed with an identification tag that can have up to
sixteen alphanumeric characters. Numbers, punctuation plus upper & lower case letters are available.
Information written in this way is saved to non-volatile memory and is retained if power to the
display is lost.
The <DT> command is used to send an ASCII string with a maximum length of 16 characters.
Uses
The <DT> command allows:
•
Displayed variables to have an associated description on screen
•
Standard screens to be used for the convenient display of up to eight process variables with
little application programming
Example
<SO2>
Select Screen format 2
<SV1>
Show the first variable
<CV1,0>
<CV2,0>
Send data to the input variables
<DT1,Temperature>
Change the Tag to read “Temperature”
<DU1,`C>
Change the Units to read “ ºC ”
Note the use of the special character ` which is converted to the
degree symbol (See the
<DU>
command)
Gotchas!
The string cannot include '>' as this is the command terminator
Some Standard Screens are unable to show the full length of the string due to lack of space
See Also
DU
Define Units
