Allen-Bradley LOGIX 5000 Reference Manual page 378

Chapter 4 Select_Limit Instructions
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Gain6 REAL
Select6 BOOL
In7 REAL
Gain7 REAL
Select7 BOOL
In8 REAL
Gain8 REAL
Select8 BOOL
Bias REAL
Output Data Type
Parameter
EnableOut BOOL
Out REAL
Structured Text
Operand Type
SSUM tag SELECTED_SUMMER
See Structured Text Syntax for more information on the syntax of expressions
within structured text.
Description
The SSUM instruction operates as follows:
Condition
No In is selected
One or more In are selected
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Gain for the sixth input.
Valid = any float
Default = 1.0
Selector signal for the sixth input.
Default is false.
The seventh input to be summed.
Valid = any float
Default = 0.0
Gain for the seventh input.
Valid = any float
Default = 1.0
Selector signal for the seventh input.
Default is false.
The eighth input to be summed.
Valid = any float
Default = 0.0
Gain for the eighth input.
Valid = any float
Default = 1.0
Selector signal for the eighth input.
Default is false.
Bias signal input. The instruction adds the
Bias to the sum of the inputs.
Valid = any float
Default = 0.0
Description
Indicates if instruction is enabled. Cleared
to false if Out overflows.
The calculated output of the algorithm.
Format
Structure
Action
Out = Bias
For all n where Selectn is true
Out = ∑ (In x Gain ) + Bias
n n
Description
SSUM structure