Varec 8315 Series Scaler Point Scaler, Dynamic Parame Function Ters, Value = Ax + By + Cz + K

8315 L&J Tankway Software Description TankGate Interface

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.

4.15.1Parameters

The database parameters used by the SCALER point are listed and described below:

Configuration	Function
Parameters
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	The PntRef parameters determine the input source for the SCALER point
PntRef2	to monitor. Up to three references may be specified. RefValue1 is the X
PntRef3	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-	Function
ters
Value	Output value for the SCALER point.
	Value = Ax + By + Cz + K.
	x corresponds the RefValue1, y is RefValue2, and z is RefValue3.

50 Installation and Operations Manual