9 Parameter data transfer
9.3 PROFIdrive parameter data channel (DP-V1)
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Lenze · E84AYCPM communication module (PROFIBUS®) · Communication Manual · DMS 5.0 EN · 11/2012 · TD17
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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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