Input-Signal Function Block

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or
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Input function blocks are needed wherever a control or filter block does not receive its input from another control or filter block. This includes external time functions that need to be passed into a block, as well as measures of your model that represent error signals to pass into a block.
An input function block takes any valid Adams Solver (run-time) expression as its input. The input function block is a valid controls block to reference as the input to any other controls block.
 
For the option:
Do the following:
Name
Enter the name that you want assigned to the function block.
Function
Enter the function expression that defines the function block. Select the More button to display the Function Builder and build an expression. See Function Builder and Adams View Function Builder online help.
Check the inputs to the function block.
Display the Information window to review the connections to the block.
Create an output measure. See Controls_measure_panel dialog box help.