Procedure
Set
Frequency Output Direction
as desired.
Option
Description
Positive Flow Only
•
Forward flow: The Frequency Output reports the flow rate according to the
configured scaling method.
•
Reverse flow: The Frequency Output is 0 Hz.
Negative Flow
Only
•
Forward flow: The Frequency Output is 0 Hz.
•
Reverse flow: The Frequency Output reports the absolute value of the flow rate
according to the configured scaling method.
Both Positive and
Negative Flow
The Frequency Output reports the absolute value of the flow rate according to the
configured scaling method. It is not possible to distinguish between forward flow and
reverse flow from the Frequency Output alone. This setting is typically used in
combination with a discrete output configured to report flow direction.
Related information
Configure Sensor Flow Direction Arrow
Configure Discrete Output Source
8.4.4 Configure Frequency Output Mode (dual-pulse mode)
Display
Menu
>
Configuration
>
Inputs/Outputs
>
Channel x
>
I/O Settings
>
Dual-Pulse Mode
ProLink III
Device Tools
>
Configuration
>
I/O
>
Outputs
>
Frequency Output Mode
Field Communicator
Configure
>
Manual Setup
>
Inputs/Outputs
>
Channel
x
>
Frequency Output
x
>
Mode
If you have two frequency outputs,
Frequency Output Mode
defines the relationship between their signals.
Frequency Output Mode
is used to implement dual-pulse mode or quadrature mode.
Restriction
If you do not have two frequency outputs on your transmitter,
Frequency Output Mode
is set to Independent
and cannot be changed.
Important
If
Frequency Output Mode
is set to anything other than Independent, the configuration of
Frequency Output 1 is applied to Frequency Output 2. Any configuration parameters set for
Frequency Output 2 are ignored. Also, status information for Frequency Output 2 is ignored.
Prerequisites
If you want to use dual-pulse mode:
•
Channel C must be configured as Frequency Output 1.
•
Either Channel B or Channel D, or both, must be configured as Frequency Output 2.
Procedure
Set
Frequency Output Mode
as desired.
Configuration and Use Manual
Integrate the meter with the control system
MMI-20025166
March 2019
Configuration and Use Manual
153