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Flow-X─ Function Reference
Flow-X General functions - fxDeviationAlarm
fxDeviationAlarm
Description
The function watches the deviation, or the difference or discrepancy, between two values and
generates an alarm when the deviation exceeds the specified limit.
Function inputs and outputs
Function inputs
Remark
EU
SW tag
Range
Default
Name
Optional tag
name, tag
description and
tag group
Input value 1
Must be linked to
another cell
Same as linked
cell
-1e11..1e11
0
Input value 2
Must be linked to
another cell
Must be same
as for input
value 1
-1e11..1e11
0
Deviation type
Determines
whether the
absolute or the
relative
difference needs
to be checked.
The unit of the
deviation limit
will be in
accordance.
1: Absolute
2: Relative
DEVTYP
1
Deviation limit
The unit depends
on the 'Deviation
type'
Absolute: Same
as input value 1
Relative : %
DEVLIM
0..1e11
0
Enabled
Enabled or
disabled the
alarm
True or false
True
Alarm type
1: Alarm
2: Warning
1
Function outputs
Remark
EU
SW tag
Alarm
Fallback
Deviation alarm
0: Normal
1: Alarm
-
DEVALM
DEVALM
Logic
Deviation type = 1 (Absolute)
A deviation alarm is raised when the absolute difference between the two values is greater
than the ‘Discrepancy limit’.
Deviation type = 2 (Relative)
A deviation alarm is raised when the absolute difference between the two values divided by
the minimum of the two values times 100 % is greater than the ‘Discrepancy limit'.
Содержание flow-x
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