Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Instrukcja Użytkownika Pobierz pdf (Strona 119)

Message Packet Formats

Chapter 5

5-40

Physical Read

This command reads the specified number of bytes from the memory of

the selected PLC-4 controller. Use this command to upload the contents

of PLC-4 memory to your computer. The SIZE field contains the number

of bytes to be read, and it may have a value from 1 to 242 decimal.

Format:

(EXT STS Byte Optional)

Format When Reporting an Error

TNSSTSCMD

SRCDST

TNSSTSCMD

SRCDST EXT

STS

Format When Successful Execution

Command Format:

TNSSTSCMD

SRCDST FNC

PLC-4

SEL

DATA

1-242 Bytes

ADDR SIZE

Physical Write

This command writes bytes of data into the memory of the selected PLC-4

controller. Use this command to download data from your computer to

the controller. The PLC-4 ADDRESS field contains the physical byte

address where the data will begin being written into PLC-4 memory.

Refer to Chapter 6 for a description of this physical address.

TNSSTSCMD

SRCDST FNC

TOTAL

TRANS

DATA

1-239 Bytes

Command

Format:

PLC-4

SEL

TNSSTSCMD

SRCDST

TNSSTSCMD

SRCDST EXT

STS

Reply Format:

(EXT STS Byte Optional)

Format When Reporting an Error

Format When Successful Execution

1 2 ... 114 115 116 117 118 119 120 121 122 123 124 ... 234 235

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