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140 Rockwell Automation Publication 1440-UM001D-EN-P - September 2016
Appendix B CIP Objects
Channel Object
(Class ID 31F
H
)
The Channel Object models front-end processing that is performed on an
input signal before specific measurements are performed. This processing
typically includes gain, filtering, and/or integration.
Channel Attributes
The Channel Object provides no class attributes.
Instances
There are four instances of this object. Instances 1 and 2 correspond to
standard channels 1 and 2, respectively. Instances 3 and 4 correspond to gSE
channels 1 and 2, respectively.
Instance Attributes
Table 67 - Channel Object Instance Attributes
Attribute
ID Access Rule Name Data Type Description Semantics
3 Get/Set Output Data Units ENGUNIT The data units of the signal resulting from
the signal processing that is performed in
the channel.
See DeviceNet Specification Volume 1 Appendix K.
Also see Parameter Object Instances 3 and 4.
Valid values:
g = 1504
h
in/sec = 2B07
h
mil = 0800
h
psi = 1300
h
volt = 2D00
h
mm/s = 0900
h
μm = 2204
h
Pa = 1309
h
mbar = 1308
h
This setting is directly related to the Sensitivity Units
of the associated transducer and the Level of
Integration that is performed on the channel.
4 Get Integration Level of
Integration USINT The level of integration to perform on the
signal.
0 = None
1 = Single
2 = Double
5 Get/Set Low Cutoff
Frequency USINT The effective high pass filter (low frequency
corner) selection.
0 = Very low (0.2 Hz)
1 = Low (1 Hz)
2 = Medium (5 Hz)
3 = High (10 Hz)
4 = Very high (40 Hz)
See attributes 100…104.
6 Get/Set Synchronous BOOL Indicates whether this channel is
synchronized with the tachometer signal. 0 = Asynchronous
1 = Synchronous