Reference, Installation, and Operations Manual

Section 6: Meter operation

3-9000-743 Rev S

June 2013

 

 

 

6.2.2Digital outputs

The following paragraphs describe the digital output configuration options.

Refer to Section 5.6.10 for information on configuring these outputs using the Daniel MeterLink Field Setup Wizard. The associated configuration data points can also be configured via the Daniel MeterLink Edit/Compare Configuration screen.

Digital output data content

The group 1 digital outputs are configured via the DO1AContent and DO1BContent data points to represent the Frequency 1 data validity (0) or the flow direction (2).

The group 2 digital outputs are configured via the DO2AContent and DO2BContent data points to represent the Frequency 2 data validity (1) or the flow direction (2).

Digital output data polarity

When a digital output represents frequency data validity, the normal polarity is for the signal to be:

a logic ‘high’ when the frequency is valid, anda logic ‘low’ when the frequency is invalid.

When a digital output represents the flow direction, the normal polarity is for the signal to be:

a logic ‘high’ when the flow is in the forward direction, anda logic ‘low’ when the flow is in the reverse direction.

The DO1AIsInvPolarity, DO1BIsInvPolarity, DO2AIsInvPolarity, and DO2BIsInvPolarity data points are used to configure the digital output polarities as follows:

FALSE - normal polarity (default setting), orTRUE - inverted polarityDigital output value data points

The value of each digital output is readable via a data point (DO1A, DO1B, DO2A, and DO2B).

Digital outputs

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