Sequence Of Communication - BONFIGLIOLI Vectron ACTIVE CUBE Manual

13.1.5
A request from the master is always answered with a reply from the slave. Each PPO
can only accept one request or one reply at a time. In this way, a defined hand-shake
procedure between master and slave must be complied with.
In the initial situation, the request and reply identification must = 0. The master sets
its request identification and waits for the slave to change the reply identification from
0 to ≠ 0. Now, the reply from the slave is available and can be evaluated. Thereupon,
the master sets its request identification = 0 and waits for the slave to change the
reply identification from ≠ 0 to 0. With this, the communication cycle is completed and
a new one can start.
Attention! The slave only replies to new requests if it has reacted to the request
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Sequence of communication

identification = 0 with the reply identification = 0.
Idle
request identification Master= 0
reply identification Slave
Master set data
+ order identification
identification
of the slave
unequal 0 ?
evulate reply data of the slave
set order identification = 0
CM-PDPV1
CM-PDPV1
a request can
= 0
be started
reply
False
True
False
True
08/08
08/08