Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario descargar pdf (Pagina 120)

Message Packet Formats

Chapter 5

5-41

Physical Write with Mask

This command sets or resets bits in a memory word of the selected

controller. The ADDRESS field contains the physical PLC-4 address of

the memory word to be modified. Refer to Chapter 6 for a description of

physical addresses.

The BIT MASK field specifies which bits in the PLC-4 word are to be

modified, and the DATA field specifies whether those bits are to be set or

reset. For each bit that is 1 in the BIT MASK, the corresponding bit in the

addressed PLC-4 word is set to the same value (1 or 0) as the

corresponding bit in the DATA field. For each bit that is 0 in the BIT

MASK, the corresponding bit of the addressed PLC-4 word is left

unchanged.

Note that you can modify up to 40 PLC-4 words in this way by specifying

a series of ADDRESS, DATA, and BIT MASK fields.

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

ADDRESS

(Repeated up to 40

Times)

DATA BIT

MASK

1 2 ... 115 116 117 118 119 120 121 122 123 124 125 ... 234 235

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Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario Pagina 120