Rockwell-automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter Manual de usuario descargar pdf (Pagina 165)

Publication 1769-UM001B-EN-P - October 2002

Explicit Messaging Application Examples B-7

The following correlates the CIP Generic message terminology with

DeviceNet command terminology and illustrates the values needed

specifically for the Get 1769 I/O Configuration Size message:

The following ladder logic program is an example of the MSG logic

needed to initiate an explicit message to the scanner/adapter. This

MSG instruction logic is specifically for the Get 1769 I/O Module

Configuration Size message. Assume the 1756-DNB scanner is in slot 1

and the Logix5550 controller is in slot 0.

Values (Hexadecimal) DeviceNet Terminology CIP Generic Terminology

e Service

Service Code

30c Class

Object Type

10 (decimal) Instance

Object ID

17 Attribute

Object Attribute

1 Service specifies the type of request being delivered. “e” hexadecimal is a “Single Parameter Read”.

2 Class specifies the desired DeviceNet class. “30c” hexadecimal is the class code for the object representing

1769 I/O.

3 Instance represents the slot number of the I/O module from which we want the configuration size.

“10” decimal in this example is the analog output module in slot 10.

4 Attribute identifies the specific characteristics of the object towards which the transaction is directed.

“17” hexadecimal means Module Configuration Size.

1 2 ... 160 161 162 163 164 165 166 167 168 169 170 ... 203 204

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Rockwell-automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter Manual de usuario Pagina 165