CIP Over the Controller Serial Port
76 Rockwell Automation Publication 1756-PM020F-EN-P - January 2019
Name Type Description of Request Parameter Semantics of Values
FNC USINT Fragmentation protocol function See CIP Services on page 13.
Extra USINT Additional information for fragmentation protocol
Request Service USINT CIP Service Code
Request Path Size USINT Number of 16-bit words in the Request Path
Request Path EPATH Logical or Symbolic Segments, or both
Service Request Data
Service data as defined by the service. Size and type varies
Similarly, the CIP service response is returned in a PCCC command reply, as
shown in the following table.
Name Type Description of Request Parameter Semantics of Values
CMD USINT Response = 0x0B + 0x40 See the DF1 Protocol and Command Set Reference
Manual, publication 1770-6.5.16.
STS USINT Status (0 == Success)
TNSW UINT Used to match response with request
FNC USINT Fragmentation protocol function See Fragmentation Protocol
Extra USINT Additional information for fragmentation protocol
Reply Service USINT CIP Service Code + 0x80 See CIP Services.
Reserved USINT 00
General Status USINT ss
Extended Status Size USINT nn
Extended Status
Only present if Size > 0
Service Response Data
Service determines whether present or not, and the size/ data
type
See also
Connected Explicit Messages through PCCC on page 76
CIP Services on page 13
Fragmentation Protocol on page 78
PCCC Command Code 0A provides CIP explicit-message connection
behavior. The services are used within these commands. For example, the
only difference between connected explicit messages through PCCC and an
EtherNet/IP explicit message connection is the wrapper that the CIP service
is carried in. EtherNet/IP network uses Ethernet and TCP/IP technology and
this uses DF1 and PCCC.
Tip:
Rockwell Automation assumes that you are familiar with CIP and the information related to CIP that is discussed here. The details of the
CIP portions of the frame are not fully described here. References to where more detailed information can be found are provided later. If
you are not familiar with CIP, a tutorial is available for purchase at http://www.rockwellautomation.com/enabled/cipetraining.html
.
The table shows the fields used and where more information can be found
about specific fields of the command structure.
Connected Explicit
Messages through PCCC
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