Chapter 1
CIP services
16
Rockwell Automation Publication 1756-PM020F-EN-P - January 2019
These values are based on the CIP Data Type Reporting Values that are
defined in Volume 1, Appendix C of the
CIP Networks Library
, but are
extended to 16-bits.
The Request Path in a CIP explicit message contains addressing information
indicating which internal resource in the target node directs the service. This
addressing information is organized by using Logical Segments, Symbolic
Segments, or both.
For more detailed information about segments, see the
CIP Networks
Library
, Volume 1, Appendix C.
The following is a summary of the Logical Segment types defined by CIP
that are supported by the Logix 5000 controller.
See also
These tables explain the Logical Segments. Not all segment types defined by
CIP are supported by Logix 5000 controllers.
Segment Type
Value
Byte Order Representation of Element ID Value (low byte first)
0
1
…
n
n+1
8-bit Element ID
0x28
Value
N/A
N/A
N/A
N/A
16-bit Element ID
0x29
00
Low
High
N/A
N/A
32-bit Element ID
0x2A
00
Lowest
Low
High
Highest
Segment Type
Value
Byte Order Representation of Class ID Value (low byte first)
0
1
…
n
n+1
8-bit Class ID
0x20
Value
N/A
N/A
N/A
N/A
16-bit Class ID
0x21
00
Low
High
N/A
N/A
Segment Type
Value
Byte Order Representation of Instance ID Value (low byte first)
0
1
…
n
n+1
8-bit Instance ID
0x24
Value
N/A
N/A
N/A
N/A
16-bit Instance ID
0x25
00
Low
High
N/A
N/A
Analysis
Segment Encoding
Logical Segments