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Siemens SITRANS F
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Setup
3.4 Inputs and outputs
FST030
Function Manual, 04/2017, A5E35693328-AA
107
Figure 3-2 Positive flow - channel 3 leads by 90°
Figure 3-3 Negative flow - channel 3 lags by 90°
Channel 2 configured as positive direction and channel 3 set to redundancy mode 180˚
Figure 3-4 Positive/negative flow - channel 3 lags by 18
Redundancy mode (pulse)
If both channel 2 and channel 3 are configured as pulse outputs, channel 3 can be
configured for redundancy mode to follow channel 2 shifted by 90˚or 180˚ of the functional
width of the pulse. If set to redundancy mode, channel 3 inherits all channel 2 settings. The
functional width of the pulse is two times the pulse "On" duration. The flow direction will
determine whether channel 3 is shifted before or after channel 2.
The following examples describe the pulse functionalities for channel 2 and 3 in redundancy
mode:
Channel 2 configured as positive and negative direction and channel 3 set to redundancy
mode 90°
Figure 3-5 Positive flow - channel 3 leads by 90°
Figure 3-6 Negative flow - channel 3 lags by 90°
Channel 2 configured as positive direction and channel 3 set to redundancy mode 180˚

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