Endress+Hauser Proline Prowirl 72 - 11.2 Resource Block (device block)

Proline Prowirl 72 FOUNDATION Fieldbus 11 Operation via FOUNDATION Fieldbus
Endress + Hauser 81
The sensor signal is first prepared in the measuring block, the Transducer Block "Flow". The process
variables mass flow and volume flow are then passed to the Analog Input Function Blocks for
technical processing (e.g. scaling, limit value processing).
In the Transducer Block "Totalizer", the measured variables for the totalizer are derived from the
process variables volume flow, corrected volume flow and calculated mass flow. These are also
available as process variables at the output of the Transducer Block.
All the important parameters for configuring the local display (display language, display values, etc.)
can be configured via the Transducer Block "Display".
The Transducer Block "Diagnosis" contains all the important parameters for diagnosis and device
maintenance. These can be used to query the device status or reasons for error messages, for
example.
The process variables run through the entire function block algorithm and are available as an output
variable to other function blocks to connect up the desired application function.
The Discrete Output Function Block (DO) allows various actions and functions in Prowirl 72 FF to
be triggered or controlled via FOUNDATION Fieldbus, e.g. resetting the totalizer.
11. 2 Resource Block (device block)
A Resource Block contains all the data that clearly identify and characterize the field device. It is an
electronic version of a nameplate on the field device. Parameters of the Resource Block include the
device type, device name, manufacturer ID, serial number, etc.
A further task of the Resource Block is the management of overall parameters and functions that
have an influence on the execution of the remaining blocks in the field device. The Resource Block
is thus the central unit that also checks the device status and thereby influences or controls the
operability of the other blocks and thus also of the device. As the Resource Block does not have any
block input and block output data, it cannot be linked to other blocks.
The most important functions and parameters of the Resource Block are listed below.
11.2.1 Selecting the operating mode
The operating mode is set by means of the MODE_BLK parameter group. The Resource Block
supports the following operating modes:
!
Note!
The OOS operating mode is also displayed by means of the BLOCK_ERR parameter. In the OOS
operating mode, all write parameters can be accessed without restriction if write protection has not
been enabled.
– AUTO (automatic mode)
–OOS (out of service)