Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario descargar pdf (Pagina 108)

Message Packet Formats

Chapter 5

5-29

Set Data Table Size

This command sets the data table size for the PLC-2 processor. Use this

command immediately before performing any physical writes on the

PLC-2 processor.

For the DATA field in this command, enter the number of bytes of

memory that you want to allocate to the PLC-2 data table. Since PC

words are two bytes long, the DATA value is double the number of words

in the PLC-2 data table. The DATA value is also equivalent to the

physical address (Chapter 6) of the start of the processor’s program

memory. To determine allowable data table sizes, refer to the

programming manual for the appropriate PLC-2 processor.

Command

Format:

Reply Format:

TNSSTSCMD

SRCDST

TNSSTSCMD

SRCDST

FNC

DATA

PLC-3 Commands

PLC-3 stations can execute all of the commands in the basic command

set. They can also execute the following commands, which apply

specifically to PLC-3 controllers:

Non-Privileged Commands

Bit Write

Word Range Read

Word Range Write

Privileged Commands

Download Request

Physical Read

Physical Write

Restart Request

Shutdown Request

Upload Request

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Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario Pagina 108