468 Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Appendix A CIP Objects
FFT Window Options
The following window processing options are selectable.
0x4C CM Record Request
Normal CM data is retrieved using a series of request/response unconnected
messages. One service is used to both start and continue with a session. The
first request initiates the session and subsequent requests return values that are
returned by the service. When the packet count down value returned reaches 0,
the session is completed.
The instance and attribute can be set to 1, but they are ignored.
Index FFT Window FFT Lines with Amplitudes Set to Zero
0x00 (0) Normal/Rectangular DC line only
0x01 (1) Flat-Top DC + 4 lines
0x02 (2) Hanning DC + 1 line
0x03 (3) Hamming DC + 1 line
Table 203 - Averages
Index Number of Averages
0x00 (0) 1
0x01 (1) 2
0x02 (2) 3
0x03 (3) 6
0x04 (4) 12
0x05 (5) 23
0x06 (6) 45
0x07 (7) 89
0x08 (8) 178
Table 204 - Common Services
Service
Code
Implementation Service Name Description of Service
Class Instance
0x0E x x Get Attribute Single Returns the contents of the specified attribute.
Table 205 - Object Specific Services
Service
Code
Implementation Service Name Description of Service
Class Instance
0x4B - - Reserved Reserved
0x4C - x Normal CM Data
Record Request
Data types consisting of multiple bytes are
transferred in little-endian format (least
significant byte first). Also, a data communication
session starts at the first service request and ends
after the final response of the exchange or after
timeout of 30 seconds.
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