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# Converting the Temperature of a CompactRIO Chassis, Ethernet RIO Chassis, MXIe-RIO Chassis, or a Single-Board RIO Device (FPGA Interface)

CompactRIO Reference and Procedures (FPGA Interface)

Edition Date: June 2010

Part Number: 370984T-01

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The FPGA I/O Node returns binary values for the chassis temperature. You can convert these values into meaningful engineering units. To ensure that the FPGA VI is as efficient as possible, convert the values in the host VI.

## Using a VI to Convert Values

Refer to the 910x Temperature Monitor (FPGA) VI in the labview\examples\CompactRIO\Chassis Specific\910x Temperature Monitor\910x Temperature Monitor.lvproj for an example of converting binary values. You can use the 910x Temperature Monitor (FPGA) VI as a subVI in the host VI to convert the values.

(cRIO-910x)

Refer to the 911x Temperature Monitor (FPGA) VI in the labview\examples\CompactRIO\Chassis Specific\911x Temperature Monitor\911x Temperature Monitor.lvproj for an example of converting binary values. You can use the 911x Temperature Monitor (FPGA) VI as a subVI in the host VI to convert the values.

(cRIO-911x)

Refer to the 915x Temperature Monitor (FPGA) VI in the labview\examples\CompactRIO\Chassis Specific\915x Temperature Monitor\915x Temperature Monitor.lvproj for an example of converting binary values. You can use the 915x Temperature Monitor (FPGA) VI as a subVI in the host VI to convert the values.

(NI 915x)

## Using an Equation to Convert Values

You can use the following equation in the host VI to convert binary values to temperature:

Temperature = Binary Value × 0.25 °C

 where Binary Value is the value returned by the FPGA I/O Node.