Appendix; Terminology - Honeywell TC4S User Manual

8.1

Terminology

Terms and abbreviation used in this user's guide and the analog module in general are as
described below.
A/D converter: converts analog to digital value proportionately to the size of analog
•
input signal.
Analog input module: as a module with the circuit to convert analog voltage/current
•
input signal to digital value, it has resolution of 14 and 16 bits according to
converters.
Channel: related with the terminal of analog I/O module and connected to various
•
voltage/current I/O devices, respectively, with applicable data and diagnosis
function.
Conversion time: time necessary for analog input module to sample and convert the
•
analog signal for the processor inside the module to get digitally-converted value
input. On the other hand, it is necessary for analog output module to convert the
digital value output from the processor inside the module to analog output signal so
to transmit the output channel.
D/A converter: related with the output module, it is used to change the continuous
•
size of analog voltage and current signal proportionately to the digital value.
Full scale: defined as the size of voltage/current where the normal operation is
•
executed.
Full scale error: displays the graph difference between agreeable analog-converted
•
value and actual analog-converted value.
Full scale range: displays the difference between the maximum and the minimum of
•
the analog input.
LSB (Least Significant Bit): displays the minimum value of the bit unit.
•
Linearity error: analog I/O is related between continuous voltage/current value and
•
digital value, whose agreeable I/O value is defined as a line within a distance of the
minimum 1LSB of voltage/current. I/O linearity error is regarded as the declination
between the agreeable-converted value and the actual-converted value on the graph.
R200 Isolated Thermocouple Input Module TC4S User's Guide
September 2010

8. Appendix

Honeywell
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