Lenze E84DxxxxxxxxxR Uživatelský manuál stáhnout pdf (Strana 37)

EDS84DPNET EN 4.0 - 11/2010 L 37

Communication manual 8400 protec PROFINET

Parameter data transfer

The acyclic channel (PROFIdrive profile)

8 Parameter data transfer

8.1 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.

8.1.1 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.

[8-1] Data communication via the acyclic channel

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