ProSoft Technology MVI56E-MNETC - Manual (Page 138)

Guide to the MVI56E-MNETC User Manual MVI56E-MNETC ♦ ControlLogix Platform
User Manual Modbus TCP/IP Client Enhanced Communication Module
Page 138 of 183 ProSoft Technology, Inc.
February 3, 2013
5.3 Data Flow between MVI56E-MNETC Module and Processor
The following topics describe the flow of data between the two pieces of
hardware (processor and MVI56E-MNETC module) and other nodes on the
Modbus TCP/IP network. The module contains up to 30 Clients, which can
generate either MBAP (Modbus API for network communications) or MNET
requests dependent on the service port selected in the command.
To Processor
DATABASE
To Module
Processor
MNETC
Module
MODBUS/TCP
Network
Output from Module
Input from Network
5.3.1 Server Driver
The server driver allows the MVI56E-MNET module to respond to data read and
write commands issued by Clients on the Modbus TCP/IP network. The following
illustration describes the flow of data into and out of the module.
1 The server driver receives the configuration information from the
configuration file on the Personality Module (compact flash card), and the
module initializes the server.