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"Parallel process loops" tag

LabVIEW RT block diagram snippet: Process Loop #1 writes an indicator, Process Loop #2 reads the indicator value with a local variable

Local variable (RT)
RT code

Use a local variable (front-panel indicator) to communicate between two parallel process loops contained within the same VI, and use a local variable to stop parallel loops with one "stop" button.

LabVIEW RT block diagrams: VI #1 writes a global variable, VI #2 reads the same global variable

Global variable (RT)
RT code

Use a global variable to communicate between two parallel process loops contained within different VIs under the same target, and use a global variable to stop parallel loops with one "stop" button.

LabVIEW RT block diagram snippet: Functional global variable subVI with unitialized while-loop shift register and case structure

Functional global variable (FGV)
RT code

Use a functional global variable (FGV) to communicate between two parallel process loops contained within different VIs under the same target, and use a FGV to stop parallel loops with one "stop" button. The "functional" nature of the FGV means that you can create additional functionality beyond that of a basic global variable, e.g., counting and calculations that operate on the stored value.

LabVIEW RT block diagram: for-loop structure enqueues 10 integers, then another for-loop structure dequeues the same elements

Queue
RT code

Use a queue to send messages and data between two or more parallel process loops contained within a VI or other VIs. Queues also serve as the foundation for the "Queued State Machine" design pattern.

LabVIEW RT block diagram snippet: Process Loop #1 writes a channel wire, Process Loop #2 reads the channel wire

Channel wire
RT code

Use a channel wire to communicate between two (or more) parallel process loops contained within the same VI, and use a channel wire to stop parallel loops with one "stop" button. Requires LabVIEW 2016 or later version.

LabVIEW FPGA block diagram snippet: Process Loop #1 writes an indicator, Process Loop #2 reads the indicator value with a local variable

Local variable (FPGA)
FPGA code

Use a local variable (front-panel indicator) to communicate between two parallel process loops contained within the same VI.

LabVIEW FPGA block diagrams: VI #1 writes a global variable, VI #2 reads the same global variable

Global variable (FPGA)
FPGA code

Use a global variable to communicate between two parallel process loops contained within different VIs under the same target.