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ProSoft Technology MVI69-GSC User Manual

Page 73

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MVI69-GSC ♦ CompactLogix or MicroLogix Platform

Reference

Generic ASCII Serial Communication Module

User Manual

ProSoft Technology, Inc.

Page 73 of 102

September 24, 2010

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

o

Initialize CompactLogix or MicroLogix backplane driver

o

Test and Clear all RAM

o

Initialize the serial communication ports

2 Module configuration
3 Initialize Module Register space
After this initialization procedure is complete, the module will begin

communicating with other devices 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 following functions: