Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Instrukcja Użytkownika Pobierz pdf (Strona 112)

Message Packet Formats

Chapter 5

5-33

File Write

This is a write command, starting address of which is either a file symbol

or a block address. This starting address must point to a file of words.

Command Packet:

TNSDST SRC CMD FNC

0F 03

PACKET

OFFSET

TOTAL

TRANS

PLC-3 LOGICAL

ADDRESS

(2-51 Bytes)

DATA

— Max. length is 239 bytes minus the length of the PLC-3 logical address.

STS

(Must be an even number of bytes.)

TNSSTSCMD

SRCDST

TNSSTSCMD

SRCDST EXT

STS

Format:

(EXT STS Byte Is Optional)

Format When Reporting an Error

Format When Successful Execution

Physical Read

This is a read command where the starting address is a PLC-3 physical

address. It is used to upload from a PLC-3 to a computer. The destination

1775-KA module will accept this command only after the source station

has successfully transmitted a shutdown request.

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

DATA

— Max. of 244 Bytes

or 122 W

ords

SIZEPLC-3

Physical

Address

1 2 ... 107 108 109 110 111 112 113 114 115 116 117 ... 234 235

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