ProSoft Technology MVI69-DFNT - Manual (Page 81)

MVI69-DFNT ♦ CompactLogix or MicroLogix Platform Reference
EtherNet/IP Client/Server Communication Module User Manual
ProSoft Technology, Inc. Page 81 of 167
May 14, 2014
5.2 Functional Overview
5.2.1 General Concepts
The following discussion explains several concepts that are important for
understanding module operation.
Module Power Up
On power up the module begins performing the following logical functions:
1 Initialize hardware components
2 Initialize CompactLogix or MicroLogix backplane driver
o Test and clear all RAM
o Initialize the serial communication ports
o Read configuration for module from DFNT.CFG file on Compact Flash
Disk
3 Initialize Module Register space
4 Enable Server Drivers
5 Enable Client Driver
6 Initialize all serial communication ports
After the module receives the configuration, the module begins communicating
with other nodes on the network, depending on the configuration.
Main Logic Loop
Upon completing the power-up configuration process, the module enters an
infinite loop that performs the functions shown in the following diagram.
Call I/O Handler
Call CFG/DEBUG Port
Driver
Call Network Client &
Server Drivers
Call I/O Handler
Transfers data between the module and processor
(user, status, etc.)
Call Serial Port Driver
Rx and Tx buffer routines are interrupt driven. Call to
serial port routines check to see if there is any data
in the buffer, and depending on the value, will either
service the buffer or wait for more characters.
Call Network Client & Server Drivers
Generate messages and
respond to messages received.
From Power Up Logic