Varec TankGate Interface 8315 Series - Manual (Page 48)

Software Description Tank Gate Interface
38 Installation and Operations Manual
4.4.9 Scaler Point (SCALER)
The Generic Scaling point allows you to perform math functions in the 8300 series
Tank Gate Interface. 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.
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 Parameters Function
Value Output value for the SCALER point.
Value = Ax + By + Cz + K.
x corresponds the RefValue1, y is RefValue2, and z is RefValue3.
RefValue1
RefValue2
RefValue3
RefValue1 - 3 are the values of the PntRef1 - 3 parameter references.
The references can be to any point that produces a floating point value.
Value1 Value parameter converted to Integer format