Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario Pagina 76

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Asynchronous Link Protocols
Chapter 4
4-33
Figure 4.19
Message T
ransfer with ACK Destroyed
Not Full
OK
xxxx
xxxx
SINK MASTER LINK SLAVE SINK
11569
DLE ACK
SOURCE/ SOURCE/
DLE STX xxxx DLE ETX BCCDLE SOH STN
(Timeout)
DL ??? CK
DLE STX xxxx DLE ETX BCCDLE SOH STN
Figure 4.20
Poll with No Message A
vailable
No Message
Not Full
SINK MASTER LINK SLAVE SINK
11570
DLE EOT
SOURCE/ SOURCE/
BCCDLE ENQ STN
Figure 4.21
Poll with Message Returned
xxxx
xxxx
OK
Not Full
SINK MASTER LINK SLAVE SINK
11571
DLE ACK
SOURCE/ SOURCE/
BCCDLE ENQ STN
DLE STX xx???xx DLE ETXBCC
BCCDLE ENQ STN
DLE STX xxxx DLE EXT BCC
Same Message
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