NI WSN-3226 Settings

Right-click the node in the Project Explorer window and select Properties. Select the Channels or Node tab.

To upload the serial number of a connected node to the Project Explorer window, right-click the gateway and select Refresh node serial numbers.

Channels Tab: Analog Input

This dialog box includes the following components:

• Channels—Specifies the channel or channels to configure.
• Channel Configuration
  • Range—Specifies the voltage range of the selected channel(s). You cannot change this setting.

    Note  Set the input range by selecting the Measurement Type on the Channels tab and the RTD/Resistance Range on the Node tab.

• Channel Attributes:
  
  

  Attribute	Value
  Measurement Type	Voltage, Resistance, or RTD
  RTD Temperature Scale*	Celsius, Fahrenheit, or Kelvin
  RTD Coefficient* (per degree Celsius)	3750—Measures the temperature of an RTD with a=.003750. 3851—Measures the temperature of an RTD with a=.003851.   3911—Measures the temperature of an RTD with a=.003911. 3916—Measures the temperature of an RTD with a=.003916. 3920—Measures the temperature of an RTD with a=.003920. 3928—Measures the temperature of an RTD with a=.003928.
  *Applicable only if you select RTD as the Measurement Type

  
  

Channels Tab: Digital Input/Output

• Channels—Specifies the channel or channels to configure.
• Channel Configuration
  • Range—You cannot change this setting.
• Channel Attributes:
  

  Attribute

  Value

  DIO Mode

  Returns or sets the mode for the corresponding DIO lines. This property can contain the following values: DI - 24V Sinking—Use this mode to connect to industrial 24V sourcing output devices. The input has a low impedance to ground and input thresholds compatible with 24 V signaling. DI - 24V Sinking with Power Management—This mode is similar to DI-24V Sinking, but the low impedance path to ground is removed when the inputs are not being actively read. This may reduce power consumption of the output device. This mode should only be used with output devices that have valid output states within 100 µs of having a low impedance path presented to the output. DI - TTL Logic—High impedance inputs with TTL compatible thresholds; suitable for most 3V or 5V logic signals. DI - Contact Closure —The input has TTL compatible thresholds and provides a pull-up resistor to 3V when the input is actively being read. This is suitable for connections to contact switches wired between the input and ground. If a contact to ground remains closed in this setting while DIO Notifications are not set to Disabled, the current into the contact switch increases power consumption and can reduce battery life. DO - Drive Low (Sinking)—For DIO output value 1, do not drive the DIO line. For DIO output value 0, drive the DIO line low. This setting does not require a supply voltage on DIO_PWR. DO - Drive High (Sourcing)—For DIO output value 1, drive the DIO line high to the DIO_PWR voltage. For DIO output value 0, do not drive the DIO line. This setting requires a supply voltage connected to the DIO_PWR pin. DO - 3V TTL Logic (Open-Collector with Pull-Up)—For DIO output value 1, pull-up the DIO line to 3V through a pull-up resistor. For DIO output value 0, drive the DIO line low. When read, the DIO line is read with TTL input thresholds. This mode allows for connection to 3V and 5V logic inputs with TTL compatible input thresholds. This setting does not require a supply voltage on DIO_PWR. Drive High and Low (Sourcing and Sinking)—For DIO output value 1, this mode drives the DIO line high to the DIO_PWR voltage. For DIO output value 0, drive the DIO line low. This setting requires a supply voltage connected to the DIO_PWR pin in order to drive high. If no supply is connected to DIO_PWR, this mode will operate as if it were set to the DO-Drive Low (Sinking) mode.

Node Tab (Analog Input and Digital Input/Output)

This dialog box includes the following components:

• Device Name—Specifies the name of the WSN node, which appears in the Project Explorer window. LabVIEW assigns a default name to the node based on the Hardware Configuration ID. You can use this field to give the node a descriptive name.
• Device Type—Specifies the type of WSN node. You cannot change this value.
• Hardware Configuration—Specifies the hardware configuration ID and the sample interval (seconds).
  • ID—Allows you to map a node in the property tree to a node of that ID on the gateway.
  • Sample Interval—Specifies how often the node samples all inputs, in seconds. For End Nodes, the nodes sleep during this interval.
  • RTD/Resistance Range—Specifies the resistance value, depending on the sensor type:
    • 400 ohms/Pt100
    • 4 kiloohms/Pt1000
    • 100 kiloohms

Note  The range you select applies to all channels only if you select RTD or Resistance as the Measurement Type.

• Sensor Power—Specifies when to apply power to the 12 V SENPWR terminal (and not to the RTD sensor). Sensor power turns off after the acquisition (except for Always On). Possible inputs are:
  • 0 ms before sampling—turns on the Sensor Power immediately when the analog acquisition starts.
  • 25 ms before sampling—turns on Sensor Power 25 ms before the analog acquisition starts.
  • 100 ms before sampling—turns on Sensor 100 ms before the analog acquisition starts.
  • 250 ms before sampling—turns on Sensor Power 250 ms before the analog acquisition starts.
  • Always On—turns on Sensor Power when the next analog acquisition starts and leaves it on indefinitely.
  • Always Off—never turns on Sensor Power

Note  Enabling Sensor Power (other than Always Off) diminishes battery life.

• Powerline Filtering—Sets or returns powerline filtering for the node. Possible inputs are:
  • None—do not reject powerline noise.
  • 50 Hz—rejects 50 Hz powerline noise.
  • 60 Hz—rejects 60 Hz powerline noise.
  • 50/60 Hz—rejects 50 Hz and 60 Hz powerline noise.

• Filtering Strength—Specifies the strength of the filter versus the power consumption. Possible inputs are:
  • High Rejection—rejects powerline noise more, at the expense of higher energy consumption.
  • Low Power—rejects powerline noise, but as energy efficiently as possible.