Endress+Hauser PROline Prosonic Flow 93 Function Manual page 174

4 Analog Input function block
174
Base index: AI 1 = 350, AI 2 = 390, AI 3 = 430, AI 4 = 470, AI 5 = 510, AI 6 = 550, AI 7 = 590, AI 8 = 630
Parameter Write access
with operating
mode
(MODE_BLK)
L_TYPE MAN
PROline Prosonic Flow 93 FOUNDATION Fieldbus
Analog Input function block /
Description
Selects the type of linearisation for the input value.
Options:
Uninitialized
Direct
With this setting, the input value avoids the linearisation function
and is looped unchanged with the same unit through the Analog
Input function block. With this option the scaling and unit of the
XD_SCALE and OUT_SCALE parameter groups must be identical.
If this is not the case, the function block changes to the OOS
operating mode and the "BLOCK CONFIG ERROR" block error is
displayed in the BLOCK_ERROR parameter.
=
PV Input value
Indirect
With this setting, the input value is re-scaled linearly via the
XD_SCALE input scaling to the desired OUT_SCALE output range.
PV
X = FIELD_VAL
Y = OUT_SCALE_100%
Z = OUT_SCALE_0%


Note!
Further information in rescaling the input value is provided on
Page 165.
Indirect Square Root
With this setting, the input value is re-scaled via the XD_SCALE
parameter group and recalculated using a root function. It is then
rescaled again to the desired output range via the OUT_SCALE
parameter group.
PV
X = FIELD_VAL
Y = OUT_SCALE_100%
Z = OUT_SCALE_0%
Factory setting:
Uninitialized


Note!
If "Uninitialized" is selected, the operating mode of the function
block does not switch to the AUTO status. In this case, the "BLOCK
CONFIG ERROR" block error is displayed via the BLOCK_ERROR
parameter.
X
--------- - ⋅ ( ) Z
= Y Z – –
100
X
⋅ ( ) Z
= --------- - Y Z – –
100
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