10 Configuration
194
10.24 External digital inputs
Open: Device Menu > Configuration > External Digital Inputs > External Digital
Inputs 1 to 8
10.25 Flow
Open: Device Menu > Configuration > Flow Rate > Flow Rate 1 to 2
Configuration point Selection/
setting option
Explanation
Designation up to 20 text characters Designation of the external digital input
Hold value No
Yes
Nonvolatile storage of the last binary value re-
ceived when the device restarts
Alarm Alarms for external digital inputs are used to monitor input-side binary sig-
nals.
The alarm settings for all digital device functions are explained together.
⇨ Chapter 10.11.3 "Digital signal alarms", page 173
Configuration point Selection/
setting option
Explanation
Input type Inactive
Digital input 2
Digital input 3
Analog input
Selection of the signal source for the flow rate
measurement
Digital input 1/2: Pulse frequency signals via
Digital inputs
Analog input: An analog signal is specified in
the
configuration item "Analog signal".
Designation up to 20 text characters Designation of the flow rate function
Analog signal Selection from
Analog selector
only for "Analog input" as "Input type":
Selection of the analog signal source as the flow
rate signal
Measuring principle Period measurement
3to300Hz
Pulse counting
300Hzto10kHz
only for "Digital input 2/3" as "Input type":
Measurement method for determining the flow
rate
Pulse frequency signals are provided by paddle
wheel sensors, for instance.
Time base 0 to 9999 s only for "Pulse counting" as "Measuring prin-
ciple":
Duration of a counting segment
The pulses counted within a counting segment
divided by the time base yields the pulse fre-
quency value.
With a setting of 0 s, the time base is 250 ms.
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