Allen-Bradley 1444-TSCX02-02RB User Manual page 403

Channel Select
Bit 0 1
Channel 0 1
The Dynamix 1444, as part of an 0x4F service response, return the following.
Table 130 - 0x4F Service Responses
Byte Offset Structure Member
Within
Structure
0 SessionInstance
1 DynamicChannel
2 Completed Records
4 RecordSize
8 PacketCountDown
12 Status
16 Data Array
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
2 3 4
2 3
Data Description
Type
USINT The host copies the SessionInstance returned here into each
subsequent CM Record Request.
Up to 3 instances are supported.
USINT Indicates the dynamic channel for this record. Channels 0...3
are valid channels.
UINT Incremented each time that another complete record has been
transferred.
There are often several packets per completed record.
UDINT For a given session, the RecordSize returned here is fixed.
DWORD The host copies the PacketCountDown returned here into each
subsequent Record Request. When the PacketCountDown
reaches 0, the session is complete and the final value in
CompletedRecords is all that is transferred.
DINT Any of the following can be returned:
• eUnrecognizedSession (1)
• e maxSessionsReached (2)
• ePacketCountOutOfSequence (3)
• eInvalidBufferSelect(4)
• eNoDataAvailable (5)
• eGeneralError (6)
• eLiveMeasurementInProgress (13)
For all successful requests, eSUCCESS (0) is returned. Any other
value ends the session.
DWORD Each record is an array of DWORDs of size RecordSize. This array
[50] of records can be large. It is the calling applications
responsibility to handle these records appropriately. The
DWORD type is just a placeholder for the actual types in the
data structure that maps to this RecordArray. See the next
section for details.
CIP Objects Appendix A
5 6 7
Reserved
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