National Instruments BridgeVIEW How Do You Assign Units to an Analog Tag?, Discrete Tags

Chapter 3 Tag Configuration

BridgeVIEW User Manual 3-28 © National Instruments Corporation

Configure the tag for raw range from zero (Raw Zero Scale) to five

(Raw Full Scale). Select Linear, and set the engineering range from

50 (Eng Zero Scale) to 100 (Eng Full Scale).

A flow meter measures the flow rate of a liquid using a differential pressure

reading. The device server provides 4–20 mA readings. The actual flow is

measured in gallons per minutes (GPM). 4 mA corresponds to 0 GPM;

20 mA corresponds to 100 GPM.

Configure the tag for raw range from 4 (Raw Zero Scale) to 20 (Raw Full

Scale). Select Square Root Scaling and set the engineering range from

0 (Eng Zero Scale) to 100 (Eng Full Scale).

How Do You Assign Units to an Analog Tag?

Use the Engineering Unit ring to assign units to a tag. If the desired unit

is not in the list, select Enter New… and enter the desired unit. In the

previous example, you select units of GPM.

Discrete Tags

The only scaling available for discrete tags is invert scaling. Click the

Invert Data checkbox, shown in Figure 3-9 to advise the BridgeVIEW

Engine to invert the discrete value when it communicates with the

device server.