Switch Block

Ribbon menu Elements tab Controls Toolkit Standard Control Blocks New/Modify
or
(Classic) Build Controls Toolkit Standard Control Blocks New/Modify
The switch is a convenient means to “zero” the signal into any block. Connect the switch at a point in the feedback loop to quickly see the change from open loop control to closed loop control. The switch takes any control block as its input.
 
For the option:
Do the following:
Name
Enter the name that you want assigned to the function block.
Input
Specify the assembly name of any controls block.
Close Switch
Set the loop to be closed.
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.