Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario descargar pdf (Pagina 88)

Message Packet Formats

Chapter 5

5-9

Basic Command Set

Basic commands include those that can generally be executed by any PC

station on the communication link, regardless of the type of PC controller

at that station. In some cases, switch settings on the station interface

module can disable execution of a particular type of command at that

station. For more details, refer to the user’s manual for the station

interface module.

Basic commands are in two categories:

Privileged:

Computer

initiates. PCs execute.

•

Diagnostic Counters Reset

•

Diagnostic Loop

•

Diagnostic Read

•

Diagnostic Status

•

Set ENQs

•

Set NAKs

•

Set T

imeout

•

Set V

ariables

Non-Privileged:

PC stations and computer can initiate;

only PCs can execute (unless the

computer is programmed for execution).

•

Protected Bit W

rite

•

Protected W

rite

•

Unprotected Bit W

rite

•

Unprotected Read

•

Unprotected W

rite

Diagnostic Counters Reset

This command resets to zero all the diagnostic timers and counters in the

station interface module. The diagnostic status command gives the

starting address for this block of counters and timers.

Command

Format:

Reply Format:

TNSSTSCMD

SRCDST FNC

TNSSTSCMD

SRCDST

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 234 235

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Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario Pagina 88

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