Description: Gets value of a tag. Mostly commonly used to pass the value of a tag to script variable or to test the value of a tag in a script.
Syntax:
tcl GETVAL tagname
GETVAL tagname.field
JScript GETVAL("tagname");
GETVAL("tagname.field");
VB Script GETVAL "tagname"
GETVAL "tagname.field"
Argument: tagname and optionally .tagfield of an IO tag, Local Screen Tag or DaqTag.
Returns: Value of the analog, digital or text tag.
See Also: @, SETVAL
Gets the value of a Tag. A tag can be any IO tag, Constant Point, Calculation Point, Accumulation Point, DAQ Tag or screen tag (local tag). GETVAL essentially replaces the standard input in Tcl, JScript and VB Script languages. Similar to @tag used with ACTION commands.
Examples:
# Tcl - set script variable x to value of TI101
set x
[GETVAL TI101]
# tcl - set AO101 to 1/2 of AO102
SETVAL AO101=[expr [GETVAL AO102] * 0.5]
# tcl -
rotate fan if tag FANSTART is on
if {[GETVAL FAN_START102] != 0} then {
SETVAL {rotatefan102=%LOOPPLUS 36}
}
// JScript - set script variable x to value of TI101
var x
x =
GETVAL("TI101");
// JScript - set AO101 to 1/2 of AO102
var value1
value1 = GETVAL("AO102") * 0.5;
SETVAL("AO101=" + value1);
// JScript
- rotate
fan if tag FANSTART is on
if (GETVAL("FAN_START101") == 1) {
SETVAL("rotatefan101=%ROTATEPLUS 16");
}
Rem VB Script - set script variable x to value of TI101
Dim x
x = GETVAL("TI101")
Rem VB Script - set AO101 to 1/2 of AO102
Dim value1
value1 = GETVAL("AO102") * 0.5
SETVAL "AO101=" & value1
Rem VB Script
- rotate
fan if tag FANSTART is on
If
GETVAL("FAN_START103") = 1 Then
SETVAL "rotatefan103=%LOOPMINUS 12"
End If
# tcl - set script variable xsetpoint to value of TIC101:SP
set
xsetpoint [GETVAL TIC101:SP]
# tcl - set script variable xalarm to Hi Alarm limit of TIC101:MEAS
set
xalarm [GETVAL TIC101:MEAS.ALMHI]