Spirit flow-x, Function Reference

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Flow-X─ Function Reference
Flow-X General functions - fxTotalizerDelta
fxTotalizerDelta
Description
The function accumulates a flow increment into a cumulative (eternal) total.
Besides of the cumulative total the function also outputs the flow increment that represents the
increase in flow quantity in the last calculation cycle. This increment value serves as an input for related
batch and period flow-weighted averaging and totalization functions.
Note: As opposed to the flow increment input value, the flow increment output
value is set to 0 when the totalization is disabled and has the proper units and is
therefore better suited as input for other functions.
Inputs and outputs
Function
inputs Remark EU SW tag Range Default
Name Optional tag name, tag description
and tag group and retentive storage.
Flow
increment Actual flow increment to be
accumulated.
Negative values will be ignored, so
the cumulative total will not
decrease. Defined by
'Input unit' 0..1e11
Enabled Dictates whether the flow
accumulation is enabled or not.
When disabled the cumulative total
will not be updated and the
increment will be set to 0.
0: Disabled
1: Enabled
EN
Input unit Unit of input 'Flow increment'.
Output unit Unit to be used for total and
increment.
Refer to the next section 'Unit
conversion' for more information.
Changing the unit will only be
possible when the cumulative total
value equals 0.
Rollover value The cumulative total will be reset to
0 when it reaches the rollover value Defined by
'Output
unit' ROVAL 0..1e15 1e12
Decimal places Defines the number of decimal
places for the total and increment
output values.
-1 means full precision (no rounding
applied) DECPLS -1..10 -1
Reset This should be used with great care!
Command to reset the cumulative
total to 0
0: No reset
1: Reset 0
Function
outputs Remark EU SW tag Alarm Fallback
Cumulative
total Total quantity accumulated
so far since the last rollover
or reset Defined by
'Input unit' CUM
Increment Increment in last Defined by INCR