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Network Command Examples
CONTINUOUS LINKS
Figure 6 shows the sequence for continuous link, which is
also diagrammed in Figure 7.
1. Host sends Master command to open link to Slave 01.
2. Master sends packet over power line addressed to Slave
01.
3. Slave 01 responds with acknowledgment packet to Mas-
ter.
4. Master outputs Acknowledgment.
5.
[
CMD
]
kk
ACK
llkk
address
ll
to host.
6. Master simultaneously sends packet to Slave.
7. Slave responds with packet to Master.
8. Master host, having received acknowledgment step 4,
sends data to Master, destined for Slave host, which is
buffered in Master.
9. As soon as it receives packet from Slave, Master sends
an additional packet to the Slave, containing data from
host buffered in step 7.
10. Master and Slave continue to trade packets, each
transmitting as soon as it receives a packet from the
other. The packet will contain whatever data has been
buffered, unless the control bits indicate that the prior
packet must be repeated.
11. Slave receives packet (8), and transmits the data it con-
tained to Slave host.
12. Master, having received a packet (9) from Slave, sends
Slave a packet with the rest of the data from Master’s
host, which had not yet arrived in its buffer when packet
(8) was sent.
13. This data is received by the Slave.
14. And sent to Slave’s host.
Packets will continue to be interchanged between the Mas-
ter and Slave until the link is broken by an appropriate com-
mand from the Master’s host. This supports bidirectional
virtual full duplex communication between the two hosts.
TL/DD/11727–12
FIGURE 7. Continuous Link Mode Diagram
TL/DD/11727–13
FIGURE 8. Command Interaction: Continuous Link
21
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