Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario Pagina 119

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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.
Reply
Format:
(EXT STS Byte Optional)
B.
Format When Reporting an Error
TNSSTSCMD
4E
SRCDST
TNSSTSCMD
4E
SRCDST EXT
STS
A.
Format When Successful Execution
Command Format:
TNSSTSCMD
0E
SRCDST FNC
0D
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
0E
SRCDST FNC
0E
TOTAL
TRANS
DATA
1-239 Bytes
Command
Format:
PLC-4
SEL
TNSSTSCMD
4E
SRCDST
TNSSTSCMD
4E
SRCDST EXT
STS
Reply Format:
(EXT STS Byte Optional)
B.
Format When Reporting an Error
A.
Format When Successful Execution
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