To configure the data rate at which C Series modules acquire and returns data at edit time, use the C Series Module Properties dialog box.

To programmatically change the data rate at run time, use the FPGA I/O Property Node. The execution of an I/O Property Node that is configured with a Data Rate property overwrites the value you configured in the C Series Module Properties dialog box.

Note Refer to the module documentation on ni.com/docs for information about the data rates of specific modules.

Configuring the Data Rate Using the C Series Module Properties Dialog Box

Complete the following steps to configure the data rate using the C Series Module Properties dialog box.
  1. Configure the system and add a module.
  2. Right-click the module in the Project Explorer window and select Properties to open the C Series Module Properties dialog box.
  3. Select the rate from the Data Rate pull-down menu.
  4. Click the OK button.
  5. Select File»Save All in the Project Explorer window.

Configuring the Data Rate Using the FPGA I/O Property Node

Complete the following steps to configure the data rate using the FPGA I/O Property Node.

  1. Place an FPGA I/O Property Node on the block diagram and configure it for the module.
  2. Right-click the Property section and select Data Rate from the shortcut menu.
  3. Right-click the Data Rate input and select Create»Control from the shortcut menu.
  4. On the front panel of the VI, select a rate from the Data Rate pull-down menu.

How do I change the data rate from the host VI?

Change the data rate at run time by writing to the control from the host VI.

What happens to the data rate if you change the master timebase source?

When you change the master timebase source, the data rate in the C Series Module Properties dialog box automatically updates to reflect the actual data rate of the module. However, the Data Rate property controls or constants on the block diagram do not automatically update when you change the master timebase source.

Note You might need to delete and recreate controls or constants for any Data Rate property on the block diagram after changing the master timebase source.

Does the Data Rate property return an error?

The Data Rate property returns error 65538 when the module is acquiring data.

To stop acquiring data before you can write properties to the modules, use Stop channel.