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Reference Number: AA-01569 // Views: 0 // Created: 2018-12-13 19:36:32 // Last Updated: 2018-12-13 20:12:15
Problem & Solution
LabVIEW Panels: Connecting Multiple Signals to a Waveform Graph
When connecting multiple RT-LAB signals to a waveform graph in my LabVIEW panel, I receive the following error:
Unable to create connection: Two sources of data can't be connected to a same input.
How can I connect multiple signals to a LabVIEW Waveform Graph?
This error can occur if the LabVIEW Waveform Graph is configured in Single Plot mode rather than Multiplot mode. Please follow the steps below to ensure that your VI is properly configured.
Step 1: Open the panel VI in LabVIEW by right-clicking the panel name in the RT-LAB Project Explorer and clicking Edit
Step 2: Navigate to Help >> Show Context Help in LabVIEW to open the Context Help window
Step 3: Hover over the graph you'd like to connect to and make sure it is a LabVIEW Waveform Graph. Waveform Charts, XY Graphs, and all other components in the Graph palette are not supported in RT-LAB LabVIEW Panel
Step 4: Make sure the Waveform Graph input is configured in Multiplot (two-dimensional) mode by following the steps described below
Step 5: In the RT-LAB Project Explorer, hold down the Ctrl key to select multiple dynamic signals
Step 6: Drag and drop the selected signals onto the Waveform Graph in the LabVIEW panel