NI PXI-5421 PFI Port Output Usage

The NI-5421 Specs Manual (http://www.ni.com/pdf/manuals/371477d.pdf) says that the PFI ports can be used to send a trigger externally. I haven't been able to find a way to do this. I want to test the potential of external triggering with my device, but for the sake of convenience I would prefer to be able to use one of the PFI ports to send a trigger to the other PFI port, for simplicity of testing (no need for additional pulse generation).
Any advice is appreciated.
Thanks,
Billy Maier

You can use the niFgen Export Signal VI to route triggers on your device to the PFI line.
http://zone.ni.com/reference/en-XX/help/370524P-01/nifgenlv/nifgen_export_signal/
Regards,
Jason L.
Product Support Engineer
National Instruments

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PXI-5421, C++, Creating output signal, DAQmxWriteAnalogF64 fails

I want to create a simple sine wave output on a PXI-5421 card. I have looked at the sample projects for DAQmx, and based an application on them.
The application falls over at the call to DAQmxWriteAnalogF64 using the following parameters:
lReturn = DAQmxWriteAnalogF64(
m_hTask,
1000,
0,
10.0,
DAQmx_Val_GroupByChannel,
data,
&lWritten,
NULL
What am I doing wrong?
Below is the output of the application, and the code.
***** START OF OUTPUT *****
DAQmxResetDevice -> SUCCESS
DAQmxCreateTask -> SUCCESS
DAQmxCreateAOVoltageChan -> SUCCESS
DAQmxCfgSampClkTiming -> SUCCESS
Samples per channel written: 0
Source terminal to be routed could not be found on the device.
Make sure the terminal name is valid for the specified device. Refer to Measurement & Automation Explorer for valid terminal names.
Device: PXI1Slot3
Property: DAQmx_SampClk_Src
Source Terminal:
Task Name: _unnamedTask<0>
Status Code: -200040
DAQmxWriteAnalogF64 -> -200040
***** END OF OUTPUT *****
***** START OF APPLICATION *****
void Startup( void )
// get amplitude
double dblAmplitude = 5; // 5 volts
// generate wave data
float64 data[1000];
for( int i=0; i<1000; i++ )
data[i] = dblAmplitude * sin( (double)i * 2.0 * PI/1000.0 );
// device, channel and terminal names
char szDeviceName[128];
strcpy(szDeviceName,"PXI1Slot3"); // PXI1Slot3
char szChannel[128];
sprintf(szChannel,"%s/ao0",szChannelName); // PXI1Slot3/ao0
char szTerminal[128];
strcpy(szTerminal,"Onboard Clock"); // Onboard Clock
// reset device
long lReturn = DAQmxResetDevice(szDeviceName);
_AddToLog("DAQmxResetDevice",lReturn);
// create task
lReturn = DAQmxCreateTask("",&m_hTask);
_AddToLog("DAQmxCreateTask",lReturn);
// if that worked...
if(lReturn==0)
// create output voltage channel
lReturn = DAQmxCreateAOVoltageChan(
m_hTask,
szChannel,
-1 * dblAmplitude,
dblAmplitude,
DAQmx_Val_Volts,
NULL
_AddToLog("DAQmxCreateAOVoltageChan",lReturn);
// if that worked...
if(lReturn==0)
// define sampling
lReturn = DAQmxCfgSampClkTiming(
m_hTask,
szTerminal,
10*1000,
DAQmx_Val_Rising,
DAQmx_Val_ContSamps,
1000
_AddToLog("DAQmxCfgSampClkTiming",lReturn);
// if that worked...
if(lReturn==0)
// write to buffer
long lWritten = 0;
lReturn = DAQmxWriteAnalogF64(
m_hTask,
1000,
0,
10.0,
DAQmx_Val_GroupByChannel,
data,
&lWritten,
NULL
CString strLine;
strLine.Format("Samples per channel written: %d",lWritten);
_AddToLog(strLine);
_AddToLog("DAQmxWriteAnalogF64",lReturn);
// if that worked...
if(lReturn==0)
// start task
lReturn = DAQmxStartTask(m_hTask);
_AddToLog("DAQmxStartTask",lReturn);
else
// clean up
_CleanUp();
void _CleanUp( void )
// stop task
long lReturn = DAQmxStopTask(m_hTask);
_AddToLog("DAQmxStopTask",lReturn);
// clear task
lReturn = DAQmxClearTask(m_hTask);
_AddToLog("DAQmxClearTask",lReturn);
***** END OF APPLICATION *****

Broccoli wrote:
I want to create a simple sine wave output on a PXI-5421 card. I have looked at the sample projects for DAQmx, and based an application on them.
The application falls over at the call to DAQmxWriteAnalogF64 using the following parameters:
lReturn = DAQmxWriteAnalogF64(
m_hTask,
1000,
0,
10.0,
DAQmx_Val_GroupByChannel,
data,
&lWritten,
NULL
What am I doing wrong?
Below is the output of the application, and the code.
***** START OF OUTPUT *****
DAQmxResetDevice -> SUCCESS
DAQmxCreateTask -> SUCCESS
DAQmxCreateAOVoltageChan -> SUCCESS
DAQmxCfgSampClkTiming -> SUCCESS
Samples per channel written: 0
Source terminal to be routed could not be found on the device.
Make sure the terminal name is valid for the specified device. Refer to Measurement & Automation Explorer for valid terminal names.
Device: PXI1Slot3
Property: DAQmx_SampClk_Src
Source Terminal:
Task Name: _unnamedTask<0>
Status Code: -200040
DAQmxWriteAnalogF64 -> -200040
***** END OF OUTPUT *****
***** START OF APPLICATION *****
void Startup( void )
// get amplitude
double dblAmplitude = 5; // 5 volts
// generate wave data
float64 data[1000];
for( int i=0; i<1000; i++ )
data[i] = dblAmplitude * sin( (double)i * 2.0 * PI/1000.0 );
// device, channel and terminal names
char szDeviceName[128];
strcpy(szDeviceName,"PXI1Slot3"); // PXI1Slot3
char szChannel[128];
sprintf(szChannel,"%s/ao0",szChannelName); // PXI1Slot3/ao0
char szTerminal[128];
strcpy(szTerminal,"Onboard Clock"); // Onboard Clock
// reset device
long lReturn = DAQmxResetDevice(szDeviceName);
_AddToLog("DAQmxResetDevice",lReturn);
// create task
lReturn = DAQmxCreateTask("",&m_hTask);
_AddToLog("DAQmxCreateTask",lReturn);
// if that worked...
if(lReturn==0)
// create output voltage channel
lReturn = DAQmxCreateAOVoltageChan(
m_hTask,
szChannel,
-1 * dblAmplitude,
dblAmplitude,
DAQmx_Val_Volts,
NULL
_AddToLog("DAQmxCreateAOVoltageChan",lReturn);
// if that worked...
if(lReturn==0)
// define sampling
lReturn = DAQmxCfgSampClkTiming(
m_hTask,
szTerminal,
10*1000,
DAQmx_Val_Rising,
DAQmx_Val_ContSamps,
1000
_AddToLog("DAQmxCfgSampClkTiming",lReturn);
// if that worked...
if(lReturn==0)
// write to buffer
long lWritten = 0;
lReturn = DAQmxWriteAnalogF64(
m_hTask,
1000,
0,
10.0,
DAQmx_Val_GroupByChannel,
data,
&lWritten,
NULL
CString strLine;
strLine.Format("Samples per channel written: %d",lWritten);
_AddToLog(strLine);
_AddToLog("DAQmxWriteAnalogF64",lReturn);
// if that worked...
if(lReturn==0)
// start task
lReturn = DAQmxStartTask(m_hTask);
_AddToLog("DAQmxStartTask",lReturn);
else
// clean up
_CleanUp();
void _CleanUp( void )
// stop task
long lReturn = DAQmxStopTask(m_hTask);
_AddToLog("DAQmxStopTask",lReturn);
// clear task
lReturn = DAQmxClearTask(m_hTask);
_AddToLog("DAQmxClearTask",lReturn);
***** END OF APPLICATION *****
Hello Broccoli,
NI-DAQmx is not a supported API for the NI-5421 AWG. For all NI Signal Generators, please use the NI-FGEN API, which shipped with your instrument. You may also download NI-FGEN (2.2.1 as of today) from
http://digital.ni.com/softlib.nsf/954feaeea92d90918625674b00658b83/8b1f32b4b8f7148586256efd006075a9?OpenDocument
You should find helpful C examples bundled with NI-FGEN that will make using the NI-5421's full capabilities very easy.
Marcos Kirsch
Signal Generators Software Engineer
Marcos Kirsch
Principal Software Engineer
Core Modular Instruments Software
National Instruments

Im using a pci-6221 daq-card.I want to know the difference(use)of a line output and a port output.

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Hello Hellraiser24,
This question has actually been discussed in another thread here:
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I am using 96 channel PXI 6509 as a DIO, In this 96 channels i need to assign 1st port for input, 2nd port for output and 4th and 5th for input so on. its is not a big deal using labview but labview creates seperate reference( Task in) for input and ouput.
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I had the system turned off over the weekend & started it up to do some linearity measurements on an ADC yesterday. As usual, I was going to do a quick check of my setup by using the NI DC-power soft front panel to output some dc voltages & check that the data converter was giving ball park correct codes before I started a vi to sweep the input voltage & collect real data.
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Hello Bob,
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What is the value read in the front panel for voltage and current after you enable the output? Are you working with the Local or Sense measurement mode? Please connect your oscilloscope to terminals C and F (refer to picture 7 on the link below) and configure the test panel to Local Sense, what is the value read on your oscilloscope?
http://www.ni.com/pdf/manuals/375128b.pdf
Regards,
MCOTO

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i understand u use javax.comm.*; classes to access the parallel port.
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PXI-6723 PFI Question

Is there any way the 10 PFIs on the PXI-6723 can be used as general-purpose DIO lines in LV 8.2?

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Regards,
André
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http://zone.ni.com/reference/en-XX/help/370736F-01/ni_dc_power_supplies_help/4130_source_stability/
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http://www.ni.com/white-paper/13093/en/
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Hi
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How Do I Configure the PFI Lines as input in PXI 6713 module

Hi,
I have PXI 6713 module in my PXI 1044 chassis. I have configured PXI 6713 module to geneate certain analogue signals to my board.
Board inturn process this analogue signal and responds back the status signals through a status register on the board. In my application,the status bits in status register of the board are mapped to the PFI 0:3 bits on PXI 6713 module ( pins 11,10 , 42 and 43).
My query is how do i configue the PFI lines as input in PXI 6713 module to read these status bits ??
May be below explanation could give you little bit more information w.r.to my query.
When i use NI USB - 6008 module to read the same bits , since this device has 12 digital I/O lines, i could able to read the status bits in to the last 4 digital lines by configuring the those digital lines as input.
In PXI 6713 module i have only 8 digital lines. These 8 digital lines i have used to send the digital signals to the board. I am left with no digital I/O lines. Hence i couldn't use these digital lines. I am left with only one option to use. Theya re PFI lines. Moreover the status bits in the pin out of board are mapped such that the bits can be read through the PFI lines.
I am wondering do we have any example code to use inorder to read these status bits on the board using the PFI lines.
Please let me know if you need additional information to help me out.
Thanks.
Solved!
Go to Solution.

Hello There,
When using the PFI pin as an input, you can individually configure each PFI for edge or level detection and for polarity selection. This PFI information can be referenced in the DAQ Analog Output Series Manual on page 6-1 (http://www.ni.com/pdf/manuals/370735e.pdf). Unfortunately, the PXI-6713 PFI lines are only capable of timing input and output signal for AI, AO, or counter/timer functions. The option of creating static DI from the PFI lines is not available for the PXI-6713. However, some cards have this capability. Newer National Instruments products with PFI lines have the option of setting PFI lines as:
Static Digital Input
Static Digital Output
Timing Input Signal for AI, AO, DI, DO, or counter/timer functions
Timing Output Signal from AI, AO, DI, DO, or counter/timer functions
(http://digital.ni.com/public.nsf/allkb/14F20D79C649F8CD86256FBE005C2BC4)
When set as static DIO, the PFI lines are assigned to a different port (eg. PFI0-7 is Port1). More details about this can be referenced at:
http://digital.ni.com/public.nsf/allkb/DA2D3CD0B8E8EE2A8625752F007596E1
http://digital.ni.com/public.nsf/allkb/862567530005F09E8625677800577C27
Regards,
Roman Sandoval | National Instruments | RF Systems Engineer

NI PXI-5421 PFI Port Output Usage

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