Lenze E94AYCPM Instrukcja Użytkownika Pobierz pdf (Strona 57)

Lenze · E94AYCPM communication module (PROFIBUS®) · Communication Manual · DMS 12.0 EN · 11/2012 · TD17 57

9 Parameter data transfer

9.3 PROFIdrive parameter data channel (DP-V1)

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9.3 PROFIdrive parameter data channel (DP-V1)

Data communication with PROFIBUS-DP-V0 is characterised by cyclic diagnostics and cyclic process

data and parameter data transfer.

An optional service expansion is the acyclic parameter data transfer of PROFIBUS-DP-V1. This

service does not impair the functionality of the standard services under PROFIBUS-DP-V0.

PROFIBUS-DP-V0 and PROFIBUS-DP-V1 can be operated simultaneously in the same network. This

enables the step-by-step expansion or retrofitting of a system.

The services of PROFIBUS-DP-V1 can be used by the class 1 master (PLC) and the class 2 master

(diagnostics master, etc.).

The integration of the acyclic service into the fixed bus cycle depends on the corresponding

configuration of the class 1 master:

• With configuration, a time slot is reserved.

• Without configuration the acyclic service is appended when a class 2 master acyclically accesses

a DP-V1 slave.

Features

• Parameter number and subindex addresses with a width of 16 bits each.

• Several parameter requests can be combined to one request (multi-parameter request).

• There is always only one parameter request in process (no pipelining).

• A parameter request/response must fit into a data block (max. 240 bytes). Requests/responses

cannot be split into several data blocks.

• No spontaneous messages are transferred.

• There are only acyclic parameter requests.

• Profile-specific parameters can be read independently of the slave state.

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Lenze E94AYCPM Instrukcja Użytkownika Strona 57