Parameter data transfer
PROFIdrive parameter data channel
PROFIdrive DP−V1
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EDS82ZAFPC201 EN 4.0
8.2.2
PROFIdrive DP−V1
Features
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Parameter number and subindex addresses with a width of 16 bits each.
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Several parameter requests can be combined to one request (multi−parameter
requests).
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Processing of one parameter request at a time (no pipelining).
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A parameter request or a parameter response must fit into one data block (max. 240
bytes). Requests/responses cannot be split over several data blocks.
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Spontaneous messages are not transmitted.
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There are only acyclic parameter requests.
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Profile−specific parameters can be read independently of the slave state.
8.2.2.1
Establishing a connection between master and slave
A class 1 master can always be used to request parameters from a slave if the slave is in the
"Data_Exchange" state.
In addition to the class 1 master connection, a class 2 master can establish a
communication connection to the slave:
DP−V1 parameter data
channel
read
write
Master
class 1
Slave
Master
class 2
Fig. 8−1
Data communication via the DP−V1 parameter data channel