Data Flow Between Mvi56E-Mnetr Module And Controllogix Processor - ProSoft Technology ControlLogix inRAx MVI56E-MNETR User Manual

MVI56E-MNETR ♦ ControlLogix Platform
Modbus TCP/IP Interface Module with Reduced Data Block
5.2.4 Data Flow between MVI56E-MNETR Module and ControlLogix
Processor
The following topics describe the flow of data between the two pieces of
hardware (ControlLogix processor and MVI56E-MNETR module) and other
nodes on the Modbus TCP/IP network under the module's different operating
modes. The module has both server and Client capability. The servers accept
TCP/IP connections on service ports 502 (MBAP) (10 server connections) and
2000 (MNET) (10 server connections). The Client can generate either MBAP or
MNET requests dependent on the service port selected in the command.
The following topics discuss the operation of the server and Client drivers.
Server Driver
The Server Driver allows the MVI56E-MNETR module to respond to data read
and write commands issued by clients on the Modbus TCP/IP network. The
following illustration and associated table describe the flow of data into and out of
the module.
ProSoft Technology, Inc.
June 14, 2011
Reference
User Manual
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