Rockwell Automation 1746-NI16V SLC 500 Analog Input Modules User Manual User Manual
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Publication 1746-UM001A-US-P
Glossary 2
is enabled and there are no channel errors. When the channel is
disabled, the channel data word is cleared (0).
digital filter - A filter implemented in firmware, using discrete,
sampled data of the input signal.
filter - A device that passes a signal or range of signals and eliminates
all others.
filter frequency - (-3 dB frequency) The user-selectable frequency.
full scale error - (gain error) The difference in slope between the
actual and ideal analog transfer functions.
full scale range - (FSR) The difference between the maximum and
minimum specified analog input values.
gain drift - The change in full scale transition voltage measured over
the operating temperature range of the module.
input data scaling -The data formats that you select to define the
logical increments of the channel data word. These may be
scaled-for-PID, or Engineering Units, which are automatically scaled.
They may also be proportional counts, which you must calculate to fit
the resolution of the quantity being measured in your application.
input image - The input from the 1746-NI16 module to the SLC500™
processor. The input image contains the module data words and status
words.
local configuration - A control system where all the chassis are
located within several feet of the processor, and chassis-to-chassis
communication is via a 1746-C7 or 1746-C9 ribbon cable.
LSB - (Least Significant Bit) The bit that represents the smallest value
within a string of bits.
module scan time - same as module update time
module update time - The time required for the module to sample
and convert the input signals of all enabled input channels and make
the resulting data values available to the SLC500 processor.
multiplexer - An switching system that allows several input signals to
share a common A/D converter.
normal mode rejection - (differential mode rejection) A logarithmic
measure, in dB, of a device’s ability to reject noise signals between or
among circuit signal conductors.