13.3 Application and Communication Relationship (AR, CR)
Every data exchange between an IO-Controller and an IO-Device is embedded into an
application relationship (AR). These ARs are used to define communication relationships
(CR) with different characteristics for the transfer of parameters, cyclic exchange of data
and handling of alarms:
n Record Data CR for the acyclic parameter data exchanger
n IO Data CR for the cyclic process data exchange
n Alarm CR for the real-time transfer of alarm events
IO-Controller IO-Device
Standard Channel
Configuration
Record Data CR
Real-Time Channel
Process Data
I/O Data CR
Real-Time Channel
Alarms
Alarm CR
Fig. 358: Application and Communication Relationship
13.4 Drive Units (DU) and Drive Objects (DO)
The PROFIdrive Base Model defines as basic elements the following three classes of
communication devices:
n Controller
The Controller is a controlling device which is associated with one or more drives
(axes). Related to the automation system, the Controller is the host for the overall
automation.
n P-Device
The P-Device (peripheral device) is a field device and the host device for the drives
(closed loop control, inverter). The P-Device typically is associated with one or more
Controller devices.
n Supervisor
The Supervisor typically is an engineering device which manages provisions of con-
figuration data (parameter sets) and collections of diagnosis data from P-Devices
and/or Controllers.
If we take a closer look at the P-Device type, we see that the Functional Objects inside
the P-Device consist of one or more Drive Units (DU) which comprises one or more Drive
Objects (DO).
PROFIdrive Base Model
Drive Units (DU) and Drive
Objects (DO)
Sigma-7 Series SERVOPACKs
PROFINET Communication
Drive Units (DU) and Drive Objects (DO)
| | PROFINET Communications - SIEP YEUOC7P 02A Revision 0 | en | 485
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