Spectrum Controls 1746sc-INO4vi - Manual (Page 10)

vi SLC 500 ™ Isolated Analog Output Modules
Overall accuracy – The worst-case deviation of the signal over the full
range, expressed in percent of full scale.
Rack – A hardware assembly that houses devices such as I/O modules,
adapter modules, processor modules, and power supplies.
Repeatability – The closeness of agreement among repeated
measurements of the same variable under the same conditions.
Resolution – The smallest detectable change in a measurement, typically
expressed in engineering units (e.g. 0.15
°
C) or as a number of bits. For
example, a 12-bit system has 4096 possible output states. It can therefore
measure 1 part in 4096. See also effective resolution.
Safe state – The state of the analog outputs entered when the processor is
not in RUN mode. The user must ensure that this state is a safe state for
the application.
Status word – Contains status information about the channel’s current
configuration and operational state. You can use this information in your
ladder program to determine whether the channel data word is valid.
Step response time – The time required for the output signal to reach
95% of its expected, final value, given a full-scale step change in the
output data word.
Useful resolution – See effective resolution.