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Chapter 5 Counters
Some of these options may not be available in some driver software. Refer to the Device Routing
in MAX topic in the NI-DAQmx Help or the LabVIEW Help for more information about available
routing options.
Routing Counter n Gate to an Output Terminal
You can route Counter n Gate out to any PFI terminal.
Counter n Aux Signal
The Counter n Aux signal indicates the first edge in a two-signal edge-separation measurement.
Routing a Signal to Counter n Aux
Each counter has independent input selectors for the Counter n Aux signal. Any of the following
signals can be routed to the Counter n Aux input:
• Any PFI terminal
• AI Reference Trigger
• AI Start Trigger
• Analog Comparison Event
• Change Detection Event
In addition, a counter’s Internal Output, Gate or Source can be routed to a different counter’s
Aux. A counter’s own gate can also be routed to its Aux input.
Some of these options may not be available in some driver software. Refer to the Device Routing
in MAX topic in the NI-DAQmx Help or the LabVIEW Help for more information about available
routing options.
Counter n A, Counter n B, and Counter n Z Signals
Counter n B can control the direction of counting in edge counting applications. Use the A, B,
and Z inputs to each counter when measuring quadrature encoders or measuring two pulse
encoders.
Routing Signals to A, B, and Z Counter Inputs
Each counter has independent input selectors for each of the A, B, and Z inputs. Any of the
following signals can be routed to each input:
• Any PFI terminal
• Analog Comparison Event
Routing Counter n Z Signal to an Output Terminal
You can route Counter n Z out to any PFI terminal.
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