Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 142)

142 Rockwell Automation Publication 1440-UM001C-EN-P - May 2014
Appendix B CIP Objects
Services
(1) Attributes can only be set while the device is in Program mode. See the description of the Device Mode Object for more information.
Relay Object (Class ID 323
H
) The Relay Object models a relay (actual or virtual). A relay can be activated or
deactivated based on the status of one or more alarms.
7 Get Time Constant REAL The detection time constant
associated with the output
smoothing filter (for the RMS and
DC meters) or the decay rate of the
peak meters. This setting is based on the Low
Frequency Cutoff (Channel object) and
Measurement (attribute 6).
If Measurement is set to 3 or 4, the
Overall Time Constant is 1.5 seconds.
If Measurement is set to 0, 1, or 2, the
table below shows the Time Constant.
8 Get Damping Factor REAL The damping factor associated
with output smoothing filter for
the RMS and DC meters (not used
with peak meters). 1.0
9 Get/Set Overall Filter USINT Overall filter type applied to the
input signal before the
measurement is performed. 0 = None
1 = Low Pass Filter
2…255 Reserved
10 Get/Set Low Pass Corner
Frequency UINT The corner frequency of the low
pass filter. 100…20,000 Hz
Table 63 - Overall Measurement Object Instance Attributes
Attr ID Access Rule Name Data Type Description Semantics
Low
Frequency
Cutoff Overall
Time
Constant
0.2 Hz 0.8
1 Hz 0.16
5 Hz 0.045
10 Hz 0.045
40 Hz 0.045
Table 64 - Overall Measurement Object Services
Service Code
Class/Instance Usage Name Description
0E
h
Instance Get_Attribute_Single Returns a single attribute.
10
h
Instance Set_Attribute_Single Sets a single attribute.
(1)