Glossary
7344/7334Hardware User Manual G-2 ni.com
A
A amperes
A/D analog-to-digital
absolute mode treatthe target position loaded as position relative to zero (0) while making
amove
absolute position position relativeto zero
acceleration/
deceleration
ameasurement of the change in velocity as a function of time. Acceleration
and decelerationdescribes the period when velocity is changing from one
valueto another.
active-high asi gnal is activewhen its value goes high (1)
active-low asignal is activewhen its value goes low (0)
ADC analog-to-digital converter
address charactercode that identifiesa specific location (or series of locations)
in memory or on a host PC bus system
amplifier the drivethat delivers power to operate the motor in response to low level
control signals. In general, the amplifieri s designed to operate with a
particular motor type—you cannot use a stepper driveto operate a DC
brush motor,for instance
Analog Input <1..4> 12-bita nalog ADC input
Analog Output <1..4> DACvoltage output
API application programming interface
axis unit that controls a motor or any similar motion or control device
Axis <1..4> Inhibit axis 1 through 4 inhibit output
Axis<1..4> Forward
Limit Input
axis 1 through 4 forward/clockwise limit switch
Axis<1..4> Home
Input
axis 1 through 4 home input