Schneider-optics Web Embedded Server Manual de usuario descargar pdf (Pagina 76)

Ethernet Developers Guide

840 USE 115 00 Version 1.0

B.3 Overview

The sample application performs the followin

steps:

Calls the window socket function

socket

to create a socket.

Calls the window socket function

setsockopt

to set the socket attributes.

Calls the window socket function

connect

to establish a connection.

Encodes the re

uest. The re

uest consists of a header followed b

a Modbus

messa

e. The header contains an invoke identifier, a protocol t

pe, the

command len

th, and a destination identifier.

Calls the window socket function

send

to transmit the re

uest to the remote

node.

Calls the window socket function

recv

to receive the response from the remote

node.

Calls the window socket function

closesocket

to close the connection and

release the socket.

The winsock.lib import librar

provided b

the installation is used to link the window

socket calls.

B.4 Development Environment

The sample application was developed with Microsoft Visual C++, version 1.52.

The sample application uses Microsoft Foundation Class. The initial application

was

enerated b

the Visual C++ application wizard.

Invoke Identifier Protocol Type Command Len

th Destination ID Modbus Messa

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 104 105

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Schneider-optics Web Embedded Server Manual de usuario Pagina 76

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