Setup
3.4 Inputs and outputs
FST030
Function Manual, 04/2017, A5E35693328-AA
105
● Pulse output configuration (channels 2 to 4)
– Operation mode = Pulse output
– Process value = Mass flow
– Amount per pulse = 1 kg
– Pulse width = 1 ms
● Measured mass flow 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
Note
Pulse width must be selected with the view that remaining time is always greater than pulse
width at the highest m
easured flow.
The frequency output function supplies a frequency (50% duty cycle) proportional to the
selected process value.
Frequency is calculated as follows:
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 = Mass flow
● Direction = Positive
● Frequency value high = 12 kHz
● Frequency value low = 2 kHz
● Upper range value = 15 kg/s
● Lower range value = 5 kg/s
To Next Page
Loading...
