Endress+Hauser Proline Promass 83 - Important functions and parameters of the Analog Input function blocks

Device Functions Proline Promass 83 FOUNDATION Fieldbus 5 Analog Input function block
Endress+Hauser 183
5.2 Important functions and parameters of the
Analog Input function blocks
The most important functions and parameters of the Analog Input function blocks are listed below.
!
Note!
All the FOUNDATION Fieldbus parameters available are described in the Operating Instructions
"FOUNDATION Fieldbus Overview" (BA013S) (available at: → www.endress.com → download).
5.2.1 Selecting the operating mode
The operating mode is configured via the MODE_
BLK parameter group. The Analog Input function block supports the following operating modes:
• AUTO (automatic mode)
• MAN (manual mode)
•OOS (out of service)
!
Note!
The block status OOS is also shown via the parameter BLOCK_ERR. In operating mode OOS, if
write protection is not enabled, you can access all the write parameters without restriction.
5.2.2 Assignment of the process variable
The Promass 83 FOUNDATION Fieldbus has eight Analog Input function blocks. The process
variables of the Transducer Block that are to be processed are assigned via the parameter
CHANNEL.
Factory-based configuration of the Transducer Blocks → Page 111 ff.
5.2.3 Linearization types
In an Analog Input function block, the input value of a Transducer Block can be linearized using the
parameter L_TYPE. The following types of linearization are available:
•Direct
With this setting the measured value from the Transducer Block (input value) bypasses the
linearization function and is looped unchanged with the same unit through the Analog Input
function block.
•Indirect
With this setting the measured value from the Transducer Block (input value) is re-scaled linearly
via the input scaling XD_SCALE to the desired output range OUT_SCALE.
• Indirect Square Root
With this setting the measured value from the Transducer Block (input value) is re-scaled via the
parameter group XD_SCALE and recalculated using an evolution function. It is then rescaled
again to the desired output range via the parameter group OUT_SCALE.