Rockwell Automation 1440-VLF02-01RA XM-121 Absolute Shaft Module - Manual (Page 131)

Publication GMSI10-UM014D-EN-P - May 2010
DeviceNet Objects 123
1 Attributes can only be set while the device is in Program Mode. See the description of the Device Mode Object
for more information.
Get_Stored_Waveform_Chunk
This service functions just like Get_Waveform_Chunk (described below)
except it operates on the stored waveform data rather than the current
waveform data. A waveform data set is stored in conjunction with the
triggered trend’s trigger event if the triggered trend is enabled.
Get_Waveform_Chunk
This service returns a portion of the waveform data structure. It is likely that
the waveform data structure will be too large to transfer over the network in
one message. This service allows the data structure to be transferred over the
network in smaller portions so that the explicit message buffer does not need
to be so large.
The Waveform Data structure contains an array of values that, taken together,
are the output of the sampling performed by the Spectrum/Waveform
10
h
Instance Set_Attribute_Single
Sets a single attribute.
1
4C
h
Instance Get_Waveform_Chunk Upload a portion of the
current Waveform data.
4E
h
Instance Get_Stored_Waveform_
Chunk Upload a portion of the
stored Waveform data.
Table C.45 Spectrum Waveform Measurement Object Services
Service
Code
Class/Instance Usage Name Description