Endress+Hauser Proline Promag 55 Operating Manual page 114

5 Analog Input function block
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5.2 Important functions and parameters
of the Analog Input function blocks
The primary functions and parameters of the Analog Input function blocks are listed below.
Note!
All FOUNDATION Fieldbus parameters available are described in the "FOUNDATION Fieldbus
Overview" Operating Instructions (BA013S) (available at: → www.endress.com → Download).
5.2.1 Selecting the operating mode
The operation mode is set by means of the MODE_BLK parameter group. The Analog Input function
block supports the following operation 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 Promag 55 FOUNDATION Fieldbus has five Analog Input function blocks. The process
variables of the Transducer Block that are to be processed are assigned via the parameter
CHANNEL. The Promag 55 FOUNDATION Fieldbus is configured in the factory as follows:
• CHANNEL = 1 → Calculated mass flow
• CHANNEL = 2 → Volume flow
• CHANNEL = 7 → Totalizer 1
• CHANNEL = 8 → Totalizer 2
• CHANNEL = 9 → Totalizer 3
5.2.3 Linearization types
In the Analog Input function block the input value can be linearized by the Transducer Block 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) avoids 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.
Device functions Proline Promag 55 FOUNDATION Fieldbus
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