Frequency Output - Siemens SITRANS F Operating Instructions Manual

Functions
8.6 Inputs and outputs
Channel 2 configured as positive direction and channel 3 set to redundancy mode 90°
Figure 8-7
Figure 8-8
Channel 2 configured as positive direction and channel 3 set to redundancy mode 180˚
Figure 8-9
Figure 8-10
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:
Example
This example shows how to calculate the output frequency for any measured flowrate:
Frequency output configuration:
126
Positive flow - channel 3 lags by 90°
Negative flow - channel 3 leads by 90°
Positive flow - channel 3 lags by 180°
Negative flow - channel 3 leads by 180°
SITRANS FC430 with HART
Operating Instructions, 03/2012, A5E03361511-01