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Overview of transferred data
Control System
Group
Cyclic data
Monitored signals
(inputs)
exchange
Commands (outputs)
Diagnosis
other basic
data transfer
Configuration,
Identification
Bus specific data
Block parameters**
Acyclic data
Single parameters
exchange
* The quantities of bytes/words are defined by the connected device.
** Block parameters are transferred during power-up.
The PDP22 (PROFIBUS DP-V1) allows to suppress the block parameter transfer (executed e.g.
during power-up) setting the appropriate parameter. This parameter is not sent to the device and
cannot be set via the device.
In the Control Builder AC500 used for the CPU AC500, the parameter is 'Ignore Block Parameters' or
'Use Block Parameters' respectively in the PDP22 parameter part.
Figure: Overview of transferred data
PROFIBUS DP-V0 <---> PROFIBUS DP-V1
Commands and monitoring signals
The transfer of commands and monitoring signals is the essential task of the field bus and the connected
units. They control and inform mainly about the process, e.g. start a motor and inform if it runs correctly,
and are the same for DP-V0 and DP-V1.
Command and monitoring telegrams represent the cyclic data transfer.
____________________________________________________________________________________________________________
V2
AC500 Hardware
Example of a slave with
PROFIBUS FieldBusPlug
Data exchange on the PROFIBUS
Type / example *
DI = digital input
AI = analog input
DO=digital output
AO=analog output
Faults and
warnings
Qty. of DI, DO,...+
product code..
baud rate, time-out..
Control function...
trip class ...
Control function...
trip class ...
1-46
Device
Direction
Comment
read
read
write
write
read
read / write
read / write
write
read / write
DP/V1 only
System data
AC500 / Issued: 05.2007
DP/
V0
and
DP/V1
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