Rockwell-automation 1768-EWEB EtherNet/IP Web Server Module User Manua Manual do Utilizador descarregar pdf (Página 133)

Publication ENET-UM527E-EN-P - October 2006

Socket Interface 133

For details on specific services, see See Socket Object Services on

page 140.

Message Transfer Sizes

The maximum amount of application data you can send or receive

depends on whether you configure the MSG instruction as connected

or unconnected. The size of the application data does not include the

parameters in the Read and Write services.

For TCP sockets, if the application data is larger than the maximum

size, you can issue multiple Reads or Writes to receive or send the

entire application message.

For UDP sockets, the size application data cannot exceed the

maximums listed for Read and Write services.

For more information on MSG instructions, see:

• Logix5000 Controllers General Instructions Reference Manual,

1756-RM003

• Logix5000 Controllers Common Procedures Programming

Manual, 1756-PM001

• EtherNet/IP Modules in Logix5000 Control Systems User Manual,

ENET-UM001

Source Length Specify the length of the Source Element.

Destination Contains the response data returned by the service.

Create a user defined type for the response data for each service.

Communication The communication path must point to the web server.

CIP Generic Msg Parameter Description

Service Connected or Unconnected

(Configured On the MSG

Communications tab)

Maximum Amount Of

Application Data

Read Connected 484 bytes

Unconnected 484 bytes

Write Connected 472 bytes

Unconnected 462 bytes

1 2 ... 128 129 130 131 132 133 134 135 136 137 138 ... 169 170

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Rockwell-automation 1768-EWEB EtherNet/IP Web Server Module User Manua Manual do Utilizador Página 133