Profinet Connection; Structure Of The Application And Communication Relationships (Ar And Cr); Connection Response With No Configuration Differences; Connection Response With Configuration Differences - WAGO -I/O-SYSTEM 750 Manual

WAGO-I/O-SYSTEM 750
750-375 PROFINET IO advanced Fieldbus Coupler
8.7

PROFINET Connection

In addition to the implicit application relationship, two IOARs and one IOSAR
are supported.
Connecting an IOAR beyond that is acknowledged negatively by the fieldbus
coupler.
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8.7.1 Structure of the Application and Communication
Relationships (AR and CR)
Once the IO controller has identified the fieldbus coupler by the device name on
the fieldbus and then assigned the configured IP settings to it, the fieldbus coupler
receives the IO controller's request to establish a connection.
The request contains various request blocks:
•
An "ARBlockReq"
•
An "IOCBlockReq" for input data
•
An "IOCBlockReq" for output data
•
An "ExpectedSubmoduleBlockReq" for each configured module or
submodule slot (incl. slot 0 of the DAP)
•
An "AlarmCRBlockReq"
8.7.1.1

Connection Response with no Configuration Differences

If the specified configuration can be adapted to the existing actual configuration,
the communication relationships (CRs) are established by the fieldbus coupler and
the blocks for the communication relationships acknowledged positively in the
response from the fieldbus coupler ("IOCBlockRes").
Since there is no difference, there is also no "ModuleDiffBlock" in the response
from the fieldbus coupler.
8.7.1.2

Connection Response with Configuration Differences

If there are differences in the configurations, the fieldbus coupler returns a
"ModuleDiffBlock" in the response to the connection in which all submodules are
listed with one ore more of the following properties, e.g.:
•
DAP revision level incompatible
(byte 2 and/or 3 of the module ID differ)
•
Wrong DAP
(byte 0 and/or 1 of the module ID differ)
•
One or more incorrectly configured or incorrectly populated module slots
•
One or more incorrectly configured or incorrectly populated submodule
slots
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Manual
Version 1.1.0
Commissioning 103