Lenze E84Dxxxx - Manual (Page 45)

Communication manual 8400 protec PROFIBUS
Parameter data transfer
DP-V1 parameter data channel (PROFIdrive profile)
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EDS84DPBUS EN 2.0 - 09/2010
8.3 DP-V1 parameter data channel (PROFIdrive profile)
Data communication with the PROFIBUS DP-V0 is characterised by cyclic diagnostics and
cyclic process data and parameter data transfer.
An optional service extension is the acyclic parameter data transfer of the PROFIBUS DP-
V1. All standard services under PROFIBUS DP-V0 still maintain their unrestricted validity.
PROFIBUS DP-V0 and PROFIBUS DP-V1 can be operated simultaneously in the same
network. This enables the step-by-step extension or retrofitting of a system.
The services of PROFIBUS DP-V1 can be used by the class 1 master (PLC) and 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
 Address for parameter number and subindex with a width of 16 bits each.
 Several parameter requests can be united 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.
 Only acyclic parameter requests exist.
 Profile-specific parameters can be read independently of the slave status.