CAN-8124/CAN-8224/CAN-8424 User Manual
CAN-8124/ CAN-8224/ CAN-8424 User Manual (Version 2.0, Aug/2007)
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3.2.3 I/O Poll Messages:
The Poll Command is a command that is transmitted by the Master. A Poll
Command is directed towards a single, specific Slave (point-to-point
connection). A Master must transmit a separate Poll command message for
each one of its Slaves that is to be polled. The Poll-Response is an I/O
message that the Slave transmits back to the Master when the Poll Command
is received. Within a Slave the two messages are received/transmitted by a
single Connection Object as in figure 3-5.
Figure 3-5 the architecture of poll IO message