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4.10 DP-V1
– Acyclic data transfer
4.10.1 DP-V1 interface
By default, one MSAC_C1 and three MSAC_C2 connections each with 244 bytes of data (4 bytes DPv1
header plus 240 bytes of user data) are supported. The MSAC_C1 connection is established together with
the cyclic connection and must be activated via the UserPrmData:
Byte
Bit
Data
Description
0
7
1
MSAC_C1 connection will be activated
The MSAC_C2 connection can be used by a C2 master (which then communicates only acyclically with the
slave) and has its own connection setup. The parameters during MSAC_C2 connection setup
(Feature_Supported, Profile_Feature_Supported, Profile_Ident_Number, etc.) are not checked, the
parameters of the request are mirrored in the response. Slot_Number = 0 addresses data of the coupler,
Slot_Number> 0 addresses the data of the function module(s).
