Rockwell-automation 5720 DriveLogix System Manual do Utilizador descarregar pdf (Página 133)

Publication 20D-UM002C-EN-P - November 2003

Communicating with Devices on an EtherNet/IP Link 6-17

The DriveLogix controller can send typed or word-range commands to PLC-5

controllers. These commands read and write data differently. The following

diagrams show how the typed and word-range commands differ.

The DriveLogix controller can process messages initiated from PLC or SLC

controllers. These messages use data table addresses. In order for these

controllers to access tags within the DriveLogix controller, you map tags to

data table addresses.

16-bit words in

PLC-5 controller

32-bit words in

DriveLogix controller

The typed commands maintain data structure and value.

1

2

3

4

Typed read command

1

2

3

4

16-bit words in

PLC-5 controller

32-bit words in

DriveLogix controller

The word-range commands fill the destination tag contiguously. Data

structure and value change depending on the destination data type.

1

2

3

4

Word-range read command

1

3

2

4

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