VIPA IM 253 DP Series, Руководство пользователя, Страница: 48 / 100

Chapter 3 Deployment IM 253DP Manual VIPA System 200V
3-8 HB97E - IM - RE_253-xDPxx - Rev. 12/44
Additional available services are shown in following table.
More detailed information to the services and the DP-V0/1 communication -
principles is to find in the PROFIBUS norm IEC 61158.
Services for Acyclic data communication between the
DPM 1 and Slaves
Read The master reads a data block from the slave.
Write The master writes a data block to the slave.
Alarm An alarm is transmitted from the slave to the
master, which explicitly acknowledges receipt.
The slave can only send a new alarm
message after it has received this
acknowledgment; this prevents any alarms
being overwritten.
Alarm_Acknowledge The master acknowledges receipt of an alarm
to the slave.
Status A status message is transmitted from the slave
to the master. There is no acknowledgment.
Data transmission is connection-oriented over a MS1 connection.
This is set up by the DPM 1 and is closely linked to the connection for
cyclic data communication. It can be used by the master that has
parameterized and configured the respective slave.
Services for Acyclic data communication between the
DPM 2 and Slaves
Initiate Abort Setup and termination of a connection for
acyclic data communication between the
DPM 2 and the Slave
Read The master reads a data block from the slave.
Write The master writes a data block to the slave.
Data_Transport The master can write application-specific data
(specified in profiles) acyclically to the slave
and if required, read data from the slave in the
same cycle.
Data transmission is connection-oriented over a MS2 connection.
This is set up before the start of the acyclic data communication by
the DPM 2 using the Initiate service. The connection is then available
for Read, Write and Data_Transport services. The connection is
terminated correspondingly. A slave can maintain several active MS2
connections simultaneously. A limitation is given by the resources
available in the Slave.
Services
Acyclic data
communication
DPM 1 (MSAC-C1)
DPM 2 (MSAC-C2)