Pulse repetition
Pulse repetition is calculated as follows:
)&
$PRXQWSHUSXOVH
3XOVHUHSHWLWLRQ
0HDVXUHGIORZUDWH
Note
Pulse width must be selected with the view that remaining time is always greater than pulse
width at the highest measured flow.
Example
● Pulse output configuration (channels 2 to 4)
– Operation Mode = Pulse Output
– Process Value = Massflow
– Amount Per Pulse = 1 kg
– Pulse Width = 1 ms
● Measured massflow value = 10 kg/s (constant)
Result:
● Pulse repetition = 100 ms
● Output frequency = 10 pulses per second with a pulse width of 1 ms
● Remaining time between pulses is 99 ms
8.6.3
Frequency output
The frequency output function supplies a frequency (50% duty cycle) proportional to the
selected process value.
Frequency is calculated as follows:
)&
0HDVXUHGPDVVIORZYDOXH
)UHTXHQF\
)OLJK)ORZ9DOXH/RZ
;
)UHTXHQF\9DOXH+LJK)UHTXHQF\9DOXH/RZ
Example
This example shows how to calculate the output frequency for any measured flowrate:
Frequency output configuration:
● Operation Mode = Frequency Output (Channel 2 to 4)
● Process Value = Massflow
Functions
8.6 Inputs and outputs
FC430 (From firmware 4.0)
Operating Instructions, 06/2017, A5E39789392-AA
165
