Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario descargar pdf (Pagina 104)

Message Packet Formats

Chapter 5

5-25

Physical Write

This command writes bytes of data into the PC data table or program

memory. Use this command to download a computer file into PLC

memory.

Use the SIZE field to specify the number of bytes to be written. To

specify a number of PC words, SIZE should be an even value because PC

words are two bytes long.

Command

Format:

Reply Format:

TNSSTSCMD

SRCDST

TNSSTSCMD

SRCDST

ADDR

DATA

— Max. of 242 Bytes

PLC-2 Commands

PLC-2 stations can execute all of the commands in the basic command

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

PLC-2 Family controllers:

Enter Download Mode

Enter Upload Mode

Exit Download/Upload Mode

Physical Read

Physical Write

Set Data Table Size

The above commands are privileged. This means that only a computer

can initiate them. Their primary use is for uploading and downloading

PLC-2 memory.

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Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario Pagina 104