Lenze E84AYCER - Manual (Page 48)

E84AYCER communication manual (PROFINET)
Parameter data transfer
The acyclic channel (PROFIdrive profile)
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EDS84AYCER EN 2.0 - 11/2010
9 Parameter data transfer
9.1 The acyclic channel (PROFIdrive profile)
An optional service extension is the acyclic parameter data transfer.
Cyclic and acyclic PROFINET services can be operated simultaneously in the network.
Properties
 Only one parameter request is processed at a time (no pipelining).
 Spontaneous messages are not transmitted.
 There are only acyclic parameter requests.
 Profile-specific parameters can be read independently of the IO device state.
9.1.1 Connection establishment of an IO controller to an IO device
An IO controller can always be used to request parameters from an IO device if the IO
device is in the "DATA_EXCHANGE" state.
[9-1] Data communication via the acyclic channel
E94YCER010
Parameter data channel
Read
Write
IO
controller
IO device