Multifunction DAQ

cancel
Showing results for 
Search instead for 
Did you mean: 

Error -200077 while configuring NI 9236

Hi,

I am using NI 9236 card with 3.3V for loadcell.I am having 5 load cells of 10N,20N,50N,200N,1000N. I want to create AI virtual channel with excitation voltage. Below is my code which is giving error at line AITaskForLoadCell.Control(TaskAction.Verify);  error -200077 msg=Requested value is not supported value for this property. The property value may be invalid because it conflicts with another property.

 

public bool CreateAIChannelLoadCell()
        {
            try
            {
                //Create a task
                AITaskForLoadCell = new Task();

                //Find out the Analog Input Channels
                if (DaqSystem.Local.GetPhysicalChannels(PhysicalChannelTypes.All, PhysicalChannelAccess.External).Length > 0)
                {
                    ArrayList AIArrChannelsLoadCell;
                    AIArrChannelsLoadCell = new ArrayList();
                    AIArrChannelsLoadCell.AddRange(DaqSystem.Local.GetPhysicalChannels(PhysicalChannelTypes.AI, PhysicalChannelAccess.External));

                    //Create custom scale for each LoadCell
                    //for 1000N having sensitivity 2.00050 mV/V
                    customScale_1000 = new RangeMapScale(customScaleName_1000, -0.00200050, 0.00200050, -1000, 1000);
                    //for 200N having sensitivity 1.99780 mV/V
                    customScale_200 = new RangeMapScale(customScaleName_200, -0.00199780, 0.00199780, -200, 200);
                    //for 50N having sensitivity 2.00217 mV/V
                    customScale_50 = new RangeMapScale(customScaleName_50, -0.00200217, 0.00200217, -50, 50);
                    //for 20N having sensitivity 1.997780 mV/V
                    customScale_20 = new RangeMapScale(customScaleName_20, -0.00199778, 0.00199778, -20, 20);
                    //for 10N having sensitivity 1.99785 mV/V
                    customScale_10 = new RangeMapScale(customScaleName_10, -0.00199785, 0.00199785, -10, 10);

                    AIBridgeConfiguration bridgeConfiguration = AIBridgeConfiguration.QuarterBridge;
                    AIExcitationSource excitationSource = AIExcitationSource.Internal;
                    //
                    //Create Analog Input Channels for LoadCell
                    AIChannel LoadcellChannel5 = AITaskForLoadCell.AIChannels.CreateVoltageChannelWithExcitation(AIArrChannelsLoadCell[0].ToString(), "channel1", AITerminalConfiguration.Differential, -0.01513, 6.551721, bridgeConfiguration, excitationSource, 3.3, false,customScale_10.Name);

                    AIChannel LoadcellChannel4 = AITaskForLoadCell.AIChannels.CreateVoltageChannelWithExcitation(AIArrChannelsLoadCell[1].ToString(), "channel2", AITerminalConfiguration.Differential, 0.00648, 6.614124, bridgeConfiguration, excitationSource, 3.3, false, customScale_20.Name);

                    AIChannel LoadcellChannel3 = AITaskForLoadCell.AIChannels.CreateVoltageChannelWithExcitation(AIArrChannelsLoadCell[2].ToString(), "channel3", AITerminalConfiguration.Differential, -0.01311, 6.563898, bridgeConfiguration, excitationSource, 3.3, false, customScale_50.Name);

                    AIChannel LoadcellChannel1 = AITaskForLoadCell.AIChannels.CreateVoltageChannelWithExcitation(AIArrChannelsLoadCell[3].ToString(), "channel4", AITerminalConfiguration.Differential, -0.01163, 6.554526, bridgeConfiguration, excitationSource, 3.3, false, customScale_1000.Name);

                    AIChannel LoadcellChannel2 = AITaskForLoadCell.AIChannels.CreateVoltageChannelWithExcitation(AIArrChannelsLoadCell[4].ToString(), "channel5", AITerminalConfiguration.Differential, -0.02233, 5.867086, bridgeConfiguration, excitationSource, 3.3, false, customScale_200.Name);

                    
                    //Verify the Task
                    AITaskForLoadCell.Control(TaskAction.Verify);

                    LoadcellChannel1.PerformBridgeOffsetNullingCalibration();
                    LoadcellChannel2.PerformBridgeOffsetNullingCalibration();
                    LoadcellChannel3.PerformBridgeOffsetNullingCalibration();
                    LoadcellChannel4.PerformBridgeOffsetNullingCalibration();
                    LoadcellChannel5.PerformBridgeOffsetNullingCalibration();

                    AIMultichnanelReaderforLoadCell = new AnalogMultiChannelReader(AITaskForLoadCell.Stream);

                    //AITask.AIChannels.All.AveragingWindowSize = 50;

                    IsConnected = true;
                }
            }
            catch (DaqException exception)
            {
                StopTask();
            }
            return IsConnected;
        }

0 Kudos
Message 1 of 2
(3,636 Views)

The feedback forum is wrong for this kind of questions. Maybe one of the hardware or CVI forums.

(sorry, I am not familiar with your device)

0 Kudos
Message 2 of 2
(3,626 Views)