The NI 9944/9945 has a half-bridge circuit inside. Therefore, Half-Bridge Completion must be enabled in order to measure a quarter-bridge circuit on a CompactRIO system correctly.
To enable Half-Bridge Completion:
- Right-click the NI 9237 in the Project Explorer window and select Properties.
- Select Enable Half-Bridge Completion on the channel connected to the NI 9944 or NI 9945, as shown in the screenshot below.