Effect of Flow Direction on digital communications
Flow Direction affects how flow values are reported via digital communications.
Effect of the Flow Direction parameter and actual flow direction on velocity
values reported via digital communications
Table 4-6:
Flow Direction setting
Actual flow direction
Forward Zero flow Reverse
Forward Positive 0 Negative
Reverse Positive 0 Negative
Bidirectional Positive 0 Negative
Absolute Value Positive
(1)
0 Positive
(1)
Negate Forward Negative 0 Positive
Negate Bidirectional Negative 0 Positive
(1) Refer to the digital communications status bits for an indication of whether flow is positive or negative.
4.5.4 Configure Velocity Cutoff
Display Not available
ProLink III Device Tools > Configuration > Process Measurement > Velocity > Velocity Cutoff
Field Communicator Configure > Manual Setup > Measurements > Velocity > Velocity Cutoff
Overview
Velocity Cutoff defines the point below which velocity will be reported as 0.
Procedure
Enter the desired value for Velocity Cutoff.
The default is 0.0. There are no limits on the range.
4.5.5 Configure Velocity Switch Setpoint
Display OFF-LINE MAINT > OFF-LINE CONFG > IO > CH B DO > CONFIG DO > CONFIG VELSW
ProLink III Device Tools > Configuration > Process Measurement > Velocity > Velocity Switch Setpoint
Field Communicator Configure > Manual Setup > Inputs/Outputs > Discrete Output > Velocity Switch
Configure process measurement
Configuration and Use Manual 43