Industrial Communication Systems

Probus 32-11

is executed parallel to cyclic data communication, but with lower priority. Figure 32.3 shows some

sample communication sequences. e master class 1 has the token and is able to send messages to

or retrieve them from slave 1, then slave 2, etc., in a xed sequence until it reaches the last slave of the

current list (MS0 relation); it then passes on the token to the master class 2. is master can then use

the remaining available time of the programmed cycle to set up an acyclic connection to any slave to

exchange records (MS2 relation); at the end of the current cycle time, it returns the token to the DPM1.

Similarly, as well