Azbil ATT085, Руководство пользователя

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Chapter 9. Operation via F
oundation
Fieldbus™
9-1. Block model
In the Foundtion Fieldbus™ all the device parameters are categorized according to their func.
tional properties and task and are generally assigned to three different blocks. A block may be
regarded as a container in which parameters and the associated functionalities are contained.
A Foundtion Fieldbus™ device has the following block types:
„
A Resource Block (device block): The Resource Block contains all the device-specific
features of the unit.
„
One or more Transducer Blocks: The Transducer Blocks contain the measuring and device-
specific parameters of the device.
„
One or more function blocks: The function blocks contain the device's automation
functions. We distinguish between different function blocks, e.g. Analog Input function
block, Analog Output function block. Each of these function blocks is used to execute
different application functions.
Depending on how the individual function blocks are arranged and connected, various
automation tasks can be realized. In addition to these blocks, a field device may have other
blocks, e.g. several Analog Input function blocks if more than one process variable is available
from the field device.
The device has the following blocks:
Fig. 9-1. Block model