Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 102)

102 Rockwell Automation Publication 1440-UM001C-EN-P - May 2014
Chapter 3 Operate the Module
Poll Message Format
The XM-124 module Poll request message contains no data. The Poll response
message can contain up to 44 REAL values for a total of 176 bytes.
The XM-124 module provides one pre-defined (static) data format of the Poll
response, defined in Assembly instance 101. It also provides a dynamic Assembly
instance, instance 199, with which you can define a custom data format for the
Poll response. The dynamic Assembly instance can contain any of the
measurement parameters included in Assembly instance 101, as well as several of
the alarm and relay configuration parameters.
The default Assembly instance is 101 and the default size is 20 bytes. You can
change the Assembly instance and define the custom Assembly instance using the
configuration software. Refer to
I/O Data Tab on page 89 .
The Poll response data can also be requested explicitly through Assembly Object
(Class ID 0x4), Instance 101 (0x65), Data Attribute (3). When you explicitly
request the Data Attribute for Assembly instance 101, it returns the entire 176
bytes.
The following tables show the static data format of Assembly instance 101.
Table 16 - XM-124 Module Assembly Instance 101 Data Format
Byte Definition
0…3 Channel 1 Overall measurement value
4…7 Channel 2 Overall measurement value
8…11 Channel 1 Gap measurement value
12…15 Channel 2 Gap measurement value
16…19 Current Speed measurement value
20…23 Peak Speed measurement value
24…27 Channel 1 Band 1 measurement value
28…31 Channel 2 Band 1 measurement value
32…35 Channel 1 Band 2 measurement value
36…39 Channel 2 Band 2 measurement value
40…43 Channel 1 Band 3 measurement value
44…47 Channel 2 Band 3 measurement value
48…51 Channel 1 Band 4 measurement value
52…55 Channel 2 Band 4 measurement value
56…59 Channel 1 1X Vector Magnitude measurement value
60…63 Channel 1 1X Vector Phase measurement value
64…67 Channel 2 1X Vector Magnitude measurement value
68…71 Channel 2 1X Vector Phase measurement value
72…75 Channel 1 2X Vector Magnitude measurement value
76…79 Channel 1 2X Vector Phase measurement value