Manual

Publication GMSI10-UM013D-EN-P - May 2010
164 DeviceNet Objects
Instance Attributes
Table C.52 Spectrum Waveform Measurement Object Instance Attributes
Attr ID
Access
Rule Name Data Type Description Semantics
3 Get Status BOOL Indicates if a fault or
alarm has occurred.
0 = Operating without alarms or
faults.
1 = Alarm or fault condition
exists. The Spectrum and
Waveform data may not
represent the actual field value.
4 Get Data Units ENGUNIT The units context of the
Data attributes.
This setting is determined by the
Channel Object’s Output Data
Units attribute (see page 153.
5 Get Domain USINT The domain used for the
spectrum and waveform
measurements.
0 = Frequency/Time
1 = Order/Position
6 Get/Set FMAX REAL The maximum frequency
or order of the spectrum
data.
0-20000 Hz if Domain = 0.
There are several predetermined
FMAX settings for which
spectrum data can be produced.
If you select an unsupported
value, then the next greater
supported FMAX value will be
used for the spectrum data.
4-40 Orders if Domain = 1.The
Number of Lines value must
be evenly divisible by the FMAX
value or an Invalid Device
Configuration error will be
returned during the Device
Mode Object Start and Save
services.
7 Get/Set Number of
Spectrum Lines
UDINT Number of lines or bins in
the spectrum data.
100, 200, 400, or 800
8 Get/Set Window Type USINT The window function to
be applied to the
waveform data prior to
computing the spectrum.
0 = Rectangular
1 = Hamming
2 = Hanning
3 = Flat Top
4 = Kaiser Bessel
9 Get/Set Period REAL The period of the
waveform.
Seconds if Domain = 0.
Cycles if Domain = 1.
10 Get Number of
Waveform
Points
UDINT Number of points in the
waveform data.
256, 512, 1024, or 2048
11 Get Overlap USINT The percent overlap
applied to the waveform
data sets used for
calculating the spectrum.
Only 0% supported.