Sequence Of Communication - BONFIGLIOLI ACTIVE Manual

10.1.5
An order of the master is always answered by a reply from the slave. Each PPO can
always only accept one order or one reply. In this way, a defined hand-shake proce-
dure between master and slave is to be complied with.
In the initial situation, order and reply identification must = 0. The master sets its
order 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 order 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 orders if it has reacted to the order identi-
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Sequence of communication

fication = 0 with the reply identification = 0.
Idle
order identification Master = 0
reply identification Slave
Master set data
+ order identification
identification
unequal 0 ?
evulate reply data of the slave
set order identification = 0
= 0 an order can
reply
False
of the slave
True
False
True
be started
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