Flow-X─ Function Reference
5-317
Flow-X IO Functions - fxDigitalInput
fxDigitalInput
The Digital Input function processes a single digital input and outputs either the actual input signal or
the latched input signal.
Function inputs
Remark
EU
SW tag
Default
Name
Optional tag name, tag description and tag
group
Channel number
1..16
CHAN
1
Logic
1: Positive
2: Negative
LOGIC
1
Mode
1: Actual
2: Latched
MODE
1
Threshold
Each digital input has 2 threshold levels that
determine whether the signal is considered
to be either high (above the threshold) or low
(below the threshold).
The threshold levels are as follows (all
relative to signal ground):
Channels 1 through 8:
1: + 1.25 Volts
2: + 12 Volts
Channels 9 through 16:
1: + 3.75 Volts
2: + 12 Volts
THRESHOLD
1
Function outputs
Remark
SW tag
Alarm
EU
Status
0: Normal
1: Input argument out of range
STS
FIOOR
-
Signal State
0: Off
1: On
Meaning depends on the input Logic and
Mode, refer to the table below.
SIGSTATE
-
Calculations
The following table summarizes the relationship between the input signal and the output 'State',
depending on the inputs 'Logic and 'Mode'.
Logic
Mode
Signal state = Off
Signal State = On
Positive
Actual
Actual signal is low
Actual signal is high
Positive
Latched
Signal has not been high during last
calculation cycle
Signal has been high during last
calculation cycle
Negative
Actual
Actual signal is high
Actual signal is low
Negative
Latched
Signal has not been low during last
calculation cycle
Signal has been low during last
calculation cycle
Summary of Contents for flow-x
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