System Configuration; Topology - AUMA AUMATIC AC 01.2 Manual

Actuator controls
AC 01.2/ACExC 01.2 Foundation Fieldbus
2.5.4.

System configuration

2.6.

Topology

Scheduled communication as well as all fieldbus devices must be configured before
their first start-up (refer to figure below). This requires a configuration tool, e.g. the
NI-FBUS Configurator by National Instruments.
Figure 3:
1 Configuration device
2 Configurating basic devices
3 Configurating LAS and link master
Prior to the actual commissioning, the Device Descriptions (DD) for all devices to be
configured must be entered using configuration tools. The configuration software
must either be able to access the device descriptions in the available libraries, or
the device descriptions must be loaded via external data storage devices.
The configuration software helps to determine how and with which devices the
measurement and control tasks of a plant are processed by connecting the function
blocks of the field devices. This task can be performed using a graphical user
interface. For this, just connect inputs and outputs of the corresponding block symbols
and define the block behaviour.
The figure below shows an example of a filling level control. The sensor output value
is connected to a PID function block. This block can be provided e.g. by actuator
controls. The subsequent analogue output acts on the actuator positioner for filling
level control by means of the valve.
Figure 4:
Several structures are available for Foundation Fieldbus:
Point-to-point topology, whereby only one device is connected to each line.
General information regarding Foundation Fieldbus
13