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8315 L&J Tankway Software Description TankGate Interface
50 Installation and Operations Manual
4.15 Scaler Point (SCALER)
The Generic Scaling point allows the user to perform math functions in the
TankGate. The SCALER point monitors one or more database reference
values and performs an equation in the form:
Value = Ax + By + Cz + K
Note! A, B, C & K are user entered constants.
Note! x, y & z are inputs from other database points.
4.15.1 Parameters
The database parameters used by the SCALER point are listed and described below:
Configuration
Parameters
Function
Tag
A Tag can contain 15 bytes of data and can include any printable ASCII
character. Tags can be used to identify points indicating the use of the
point such as “Eng Converter” . The default tag is set to “SCALER.00”.
PntRef1
PntRef2
PntRef3
The PntRef parameters determine the input source for the SCALER point
to monitor. Up to three references may be specified. RefValue1 is the X
term, PntRef2 is the Y term, and PntRef3 is the Z term. If a reference is
not specified, then it is not used in the equation.
A
Constant that is multiplied with RefValue1
B
Constant that is multiplied with RefValue2
C
Constant that is multiplied with RefValue3
K
Constant K
Deadband
Change of State deadband
Report
Causes automatic notification to the Host (in response to a Change of
State Request) when the Value changes State. Parameter value can be
High, Low or No. Report=No disables notification. Points with Report =
High will be sent before points with Report = Low. The default is No.
Maxtime
Specifies the maximum time (in secs) between automatic Change of
State responses being sent to the Host. Report must be set to either Low
or High for the Value parameter to be sent in response to a Change of
State Request. A value of 0 disables this option. Non-zero values cause
responses to be sent although the value may have not changed since
the last message. The default is 60.
Dynamic Parame-
ters
Function
Value
Output value for the SCALER point.
Value = Ax + By + Cz + K.
x corresponds the RefValue1, y is RefValue2, and z is RefValue3.