Counter N A, Counter N B, And Counter N Z Signals; Routing Signals To A, B, And Z Counter Inputs; Routing Counter N Z Signal To An Output Terminal; Counter N Up_Down Signal - National Instruments X Series User Manual

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.

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:
• RTSI <0..7>
• PFI <0..15>
• PXI_STAR
• PXIe_DSTAR<A,B>
• Analog Comparison Event

Routing Counter n Z Signal to an Output Terminal

You can route Counter n Z out to any RTSI <0..7> terminal.

Counter n Up_Down Signal

Counter n Up_Down is another name for the Counter n B signal.

Counter n HW Arm Signal

The Counter n HW Arm signal enables a counter to begin an input or output function.
To begin any counter input or output function, you must first enable, or arm, the counter. In some
applications, such as a buffered edge count, the counter begins counting when it is armed. In
other applications, such as single pulse-width measurement, the counter begins waiting for the
Gate signal when it is armed. Counter output operations can use the arm signal in addition to a
start trigger.
Software can arm a counter or configure counters to be armed on a hardware signal. Software
calls this hardware signal the Arm Start Trigger. Internally, software routes the Arm Start Trigger
to the Counter n HW Arm input of the counter.
X Series User Manual
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