Lenze ELCAMZIxxx4SNNPSNN (LCU122) - Manual (Page 62)

PROFIsafe on board
Parameter data transfer
PROFIdrive parameter data channel (DP-V1, acyclic)
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62 EDSLCMX3024-SPS EN 5.0
6.4.2 PROFIdrive parameter data channel (DP-V1, acyclic)
Introduction
Data communication with PROFIBUS-DP-V0 is characterised by cyclic diagnostics and
cyclic process data and parameter data transfer.
Anoptional service extensionis theacyclic parameterdatatransferof 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 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:
ƒ
For an existing configuration a time slot is reserved.
ƒ Without configuration the acyclic service is appended when a class 2 master
acyclically accesses a DP-V1 slave.
Features
ƒ Address for parameter number and subindex with a width of 16 bits each.
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Processing of one parameter request at a time (no pipelining).
ƒ A parameter request/response must fit into a data block (max. 240 bytes).
Requests/responses cannot be split into several data blocks.
ƒ Spontaneous messages are not transmitted.
ƒ There are only acyclic parameter requests.
ƒ Profile-specific parameters can be read independently of the slave state.