Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Bedienungsanleitung PDF herunterladen (Seite 107)

Message Packet Formats

Chapter 5

5-28

Physical Read

This command reads bytes of data from the PC data table or program

memory. Use this command to upload the contents of PLC-2 memory to

your computer.

Use the SIZE field to specify the number of bytes to be read. 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 244 Bytes

SIZE

Physical Write

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

memory. Use this command to download the contents of a computer file

into PLC-2 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

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 234 235

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Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Bedienungsanleitung Seite 107