Mindconnect Ethernetip - Cip Communication Path; Case 1 - Accessing Data Inside An Allen- Bradley Plc - Siemens MindConnect Nano System Manual

Appendix
8.13 Case 1 Accessing data inside an Allen- Bradley PLC
Abbreviation
PC
S7
UI
8.12 MindConnect EthernetIP - CIP Communication path (route
parameters) settings
The CIP uses a method of encapsulating the messages adding communication path segments to
the command segment. This leads to a longer and longer growing message as the number of
routing stations grows.
As an example, the following simple layout is used to explain that fact.
The MindConnect is acting as a CIP client.
The CIP server is provided by a ControlLogix or CompactLogix.
Each CIP message contains the routing information to the target. Every time a bridge accepts
such a CIP message it strips out its own address information and forwards the modified CIP
message to the next addressee along the way. When there is no further routing information
available the destination target has been reached and the CIP message will be interpreted. Once
interpreted the response will be send the same way back the request came. This means each
bridge keeps a reference to the request package.
8.13 Case 1 – Accessing data inside an Allen- Bradley PLC
MindConnect Nano
System Manual 7/2023
Description
Personal Computer
STEP 7
User Interface
122