Rockwell Automation Publication 1444-UM001D-EN-P - June 2018 489
CIP Objects Appendix A
Example, where identifier lower 16 bits are 0x 0024
• 00 indicates that measurement unit is Volt
• Bits 2 & 5 are set to indicate path 1 is in use and synchronous sampling is
enabled (so data is based on synchronous sampling)
Response to an 0x4D service request is as follows.
Behavior
Through the Object-specific services 0x4B and 0x4C, the Advanced CM Data
Object gives access to dynamically configurable analysis data (variable FFT
lines, and so on). The service 0x4B configures/requests the desired processing
be implemented, while the service 0x4C is used to request the resulting data.
One request can include multiple channels and data types to avoid the
complication of varying record sizes the resulting data can be requested on one
channel and data type per session basis.
See the Data Manager Object for access to historical data (Trend and Alarm),
to the Normal CM Object for access to a 'Live' version of that data. Also see the
Transient Data Manager Object for access to stored transient event data.
Table 236 - 0x4D Advanced CM Data Session Reset, Service Request
Byte Offset Within
Structure
Structure Member Data Type Description
0 Advanced Session Instance UINT The Advanced Session
Instance to be reset.
2 Pad UINT Used to align data to a 32
bit boundary
Byte Offset
Within Structure
Structure Member Data Type Description
0 Status DINT Status codes:
0: eSUCCESS
• Returned after all successful requests.
1. eUnrecognizedSession
2. eMaxSessionsReached
3. ePacketCountOutOfSequence
4. eInvalidBufferSelect
5. eNoDataAvailable
6. eGeneralError
7. eDeniedRequestAlreadyInProgress
8. eSessionAccessDenied
• Is returned if trying to reset the advanced
setup with the wrong Advanced Session
Instance.
9.eAdvancedMeasurementRequestInProgress
10. eRequestQueued
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