
102 • Programmable Field Bus Controller 750-833
Acyclic Communication According to DP/V1
WAGO-I/O-SYSTEM 750
Bus System
The bus coupler supports the following acyclic services according to
IEC61158-3:
MSAC1 Service Requester Responder
MSAC1_Read
x
MSAC1_Write
x
MSAC2 Service Requester Responder
MSAC2_Initiate
x
MSAC2_Abort
x x
MSAC2_Read
x
MSAC2_Write
x
The MSAC1 services are released when the DP/V1 operation has been
activated in the parameter data and the cyclic MSCY0 connection is
established. The MSAC1 connection is closed when the DP data exchange is
finished. In the event of cyclic or acyclic connection failures, both
communication channels will be closed.
The MSAC2_Initiate service is used to open an acyclic MSAC2 connection.
Once the connection has been established, it will be monitored by the C2
master. When failures occur, both the master and the slave can close the
connection via MSAC2_Abort. The bus coupler is able to manage a MSAC2
connection.
Comentários a estes Manuais