© National Instruments
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G-1
Glossary
S
ymbol
Prefix
Value
n
nano
10
-9
μ
micro
10
- 6
m
milli
10
-3
k
kilo
10
3
M
mega
10
6
Numbers/Symbols
+5 V OUT
+5 VDC source signal
A
acceleration/
deceleration
A measurement of the change in velocity as a function of time.
amplifier
A device that delivers power to operate the motor in response to
control signals.
axis
Unit that controls a motor or any similar motion or control device.
C
CCW
counterclockwise—Implies direction of motor rotation.
closed-loop
A control system that uses feedback to achieve control.
COM
Reference signal for digital I/O.
counts
Specified encoder resolution multiplied by four.
crosstalk
A phenomenon by which a signal transmitted on one channel causes
an undesired effect on another channel.
CW
clockwise—Implies direction of motor rotation.