Parameter data transfer
PROFIdrive parameter data channel
PROFIdrive DP−V1
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EDSMF2133IB EN 5.0
8.3.1 PROFIdrive DP−V1
Features
ƒ Parameter number and subindex addresses with a width of 16 bits each.
ƒ Several parameter requests can be combined to one request (multi−parameter
requests).
ƒ Processing of one parameter request at a time (no pipelining).
ƒ 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.
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.
8.3.1.1 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
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