Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario descargar pdf (Pagina 116)

Message Packet Formats

Chapter 5

5-37

Word Range Write

This is a write command whose starting address is either a word symbol, a

file symbol plus a word offset, or a logical address. This starting address

must point to a word in a file. The function code is 0. A special case of

this command is the single-word write, where the number of bytes to read

is only one word long.

Command Format:

TNSDST SRC CMD 00 00FNC

0F 00

PACKET

OFFSET

TOTAL

TRANS

ASCII SYMBOL

(8 CHARS. MAX.)

DATA — MAX. OF 228 BYTES OR 114 WORDSW/F

TNSDST SRC CMD FNC

0F 00

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

Logical Address

A. W

ord Symbol Address

STS

PLC-4 Commands

PLC-4 stations can execute all of the commands in the basic command

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

PLC-4 Microtrols:

Allocate Processor

Deallocate Processor

Initialize Processor

Physical Read

Physical Write

Physical Write with Mask

Set to Program Load Mode

Set to Run Mode

Set to Single-Scan Test Mode

Set to Test Mode

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