Lenze ELCAMZIxxx4SNNPSNN (LCU122) - Manual (Page 63)

PROFIsafe on board
Parameter data transfer
PROFIdrive parameter data channel (DP-V1, acyclic)
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63 EDSLCMX3024-SPS EN 5.0
6.4.2.1 Connection establishment 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:
DPV1 parameter data
channel
Read
Write
Master
class 1
Slave
Master
class 2
Fig.6-4 Data communication via the DPV1 parameter data channel
In contrast to a class 1 master connection, the class 2 master connection must be
established and terminated separately:
Master Slave
Initiate.req (SAP 0x31)
Immediate response (with SAP x)
Polling on SAP x
Initiate.res
Either DS_Read/Write or Idle
Data exchange in both directions
Abort
Fig.6-5 Process sequence when establishing a class 2 master connection