Rockwell-automation 1770, D17706.5.16 Ref Mnl DF1 Protocol Command Uživatelský manuál stáhnout pdf (Strana 85)

6–6 Application Layer Message Packets

Publication

17706.5.16 - October 1996

STS and EXT STS

These bytes work together to indicate the status of the message

transmission.

This byte In this message Has this value

STS

command The application program sets = 0.

STS

(status)

= 0 when the command has executed with no

error.

EXT STS

➀

(extended status)

= one of the status codes listed in Chapter 8,

Message Packet Status Codes (STS, EXT

STS)." This byte will also  0 if an error

occurs.

➀

EXT STS is part of the message only if STS = F0.

32107654

Link layer uses these bits to report local errors  errors that occur

when the link layer attempts to transmit a message across the link.

Application layer uses these bits (and in some cases the EXT STS byte),

to report remote errors  errors that occur when the command executor

at the destination node tries to execute the command message).

STS byte

EXT STS byte

no EXT STS byte

Four high bits

of STS byte all

= 1 (F0 hex)?

Yes

STS and EXT STS error codes

For more information on STS and EXT STS error codes,

see Chapter 8, “Message Packet Status Codes (STS, EXT STS).”

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Rockwell-automation 1770, D17706.5.16 Ref Mnl DF1 Protocol Command Uživatelský manuál Strana 85