Prosoft-technology MVI69-EGD Manual de usuario descargar pdf (Pagina 78)

MVI69-EGD ♦ CompactLogix or MicroLogix Platform Reference

GE Ethernet Global Data Communication Module

Page 78 of 96 ProSoft Technology, Inc.

November 3, 2008

Central to the functionality of the module is the internal database. This database

is shared between all the drivers in the module and is used as a conduit to pass

information from one device on one network to one or more devices on another

network. This permits data from devices on one communication port to be viewed

and controlled by devices on another port.

The consumer functionality provided in the EGD driver is used to transfer data

from other nodes on the network into the module's database. The following

diagram describes the flow of data between the consumer, the internal database

and the remote EGD devices:

5.2.5 General Concepts

The following topics describe several concepts that are important for

understanding the operation of the MVI69-EGD module.

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 Reads configuration from Compact Flash Disk

3 Initialize Module Register space

4 Enable Slave Driver on selected ports

After the module has received the Module Configuration, the module will begin

communicating with other nodes on the network, depending on the configuration.

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Prosoft-technology MVI69-EGD Manual de usuario Pagina 78