MULTIPLE INPUT ERROR (2 INPUT 1 OUTPUT ERROR)

I was doing my project using two different inputs(sound and Infrared sensor) with one output. However I encounter an error. I hope someone can help me out with my problems.
Error screenshot:
[spoiler][img]http://img337.imageshack.us/img337/1066/errorhe5.png[/img][/spoiler]
Attachments:
ERROR.JPG ‏85 KB
ERROR1.vi ‏186 KB

Since i don't have your hardware, it is not worthy to create an example where you hope for a direct funtionality.
It is much better if you understand the work the assistant is doing for you.
The DAQ assistant supplies the user with an interface to many (not all) functions usable with DAQmx devices. You can configure your task there; the task consists of at least one physical channel (you can say the inputpin) and the settings for the amplifier and multiplexer (if the device has a multiplexer) for each channel (which is called global virtual channel then).
Next step is to define timing and trigger settings which are effective for the whole task (so all virtual channels!).
I still suspect that you have two analog inputs connected to the sources and the device is multiplexing. So you have to configure one task containing both physical channels and their appropriate settings. Both channels will be sampled with the same timing settings then. The DAQ assistent already splits up the signals into two different waveforms which are encapsulated in the dynamic datatype. Just retrieve the signals properly.
hope this helps,
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

Similar Messages

Multiple inputs and outputs using DAQmx VIs

Hello,
I am fairly new with the LabView programming language. I have a few training books that I have been reading, and I have been following online tutorials and reading the forums. However, I have come to a problem where I don’t see a clear solution. I am using LabView 2009 (9.0f3) and DAQmx VIs.
I am using a NI 9172 chassis PLC, with two 9201 AI cards, 9217 AI RTD card, 9472 DO card, 9263 AO card, and two 9237 AI Bridge cards.
I am reading eight analog inputs with the 9201 cards, two analog RTD inputs with the 9217 card, three digital outputs with the 9472 card, three analog outputs with the 9263, and eight analog inputs with the 9237 cards.
I wrote a simple program to test one digital output task, two of the analog output tasks, and a single analog input task. I put all of them in the same while loop, and it worked perfectly. However, when I add analog input tasks to the same loop, I get an error 200022. So I tested each sensor individually by changing the channel before each run. I searched error 200022 and found that this is because I cannot start another analog input task until the previous one ends. With this said, I don’t know how to acquire an analog voltage in the same task as an analog RTD voltage. Both inputs take different constants in the start task DAQmx icon.
Attached is my test program. It is titled “Test All”. This is the program I used to test the various sensors. I tested the input sensors one at a time, and it worked fine. A few tasks are written just to test functionality, and will be added to later. The data is only displayed on the screen. I will add triggers and data write to disk functions later. This program works now, but if I add more analog inputs, it will generate the 200022 error.
Can someone show me how to correctly write the code for multiple inputs and outputs using DAQmx? All training materials and tutorials I can find all show a single input or single output, not multiples of each. Thanks for looking.
-Randy
Attachments:
TestAll-NI.vi ‏32 KB

Hi RandyC,
The Knowledge Base article Using Different Types of DAQmx Global Channels in the Same Task goes into a little more depth of what Bryan is talking about, and it also includes some example code to help show what to do.
Hope that helps,

How do I create an xControl with multiple inputs and outputs?

Hello,
i am trying to write a new Xcontrol Element. In the data model I can create data types using the cluster to create compound types, eg an int and an int array. But how do I create an xcontrol which has multiple data inputs and outputs?
Kind Regards

Limping_Twerp wrote:
Alright: I see: An xcontrol is either an input OR an output. How do I achieve an output? Secondly: So you are saying the only Elements that can have multiple inputs and outputs are VIs?
Can you take a few steps back and explain what you are actually trying to do. SubVIs and Xcontrols have nothing in common and it is not clear why you even try to compare them side by side (e.g. in terms of the number of connectors).
Your questions about input or output tell us that you seems to have some misconceptions about xcontrols. Xcontrols are like regular controls, except they have some built-in intelligence that you can program. Most front panel object can be either controls or indicators and the same is true for Xcontrol. You create an Xcontrol, and after placing it on the front panel you can decide if it should be a control (where the code reads the value) or an indicator (were the code writes values to it). When you define the xcontrol facade, you also need to program how the visuals change if it is changed from control to indicator or vice versa.
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LabVIEW Champion . Do more with less code and in less time .

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I cant find anything on it in the manual.
Thanks,
Kenny

Normally I would select 'All' using a FP IO point function instead of create tag ( LV 7.0 and up ). I have noticed that the 'All' is only available if the module is all inputs or all outputs. It may be that since your module is an IO, 'All' is not available by default.
I think you need to create an item in MAX in the Data Neighborhood under the DIO-550 Module and configure it to use all the IO on the module.

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Hello
I am after some advice regarding my PCI 6543 digital I/O card and the best way to achieve my desired results. I am programming in Visual C++ with Ni-DAQ 7.
I want to generate a pattern output from one of the ports, Port A, following a software command. This pattern consists of a 10uS pulse on DIOA0, that repeats 200 times with a period of 100uS. I want this DIOA0 output line to initiate an input on ports C and D, possibly through the REQ pin. Consequently the input should acquire 200 times for each call to the pattern output.
I want this to repeat, so the pattern output goes again (as in a FOR loop), and the input occurs again for an as yet undetermined number of times.
I have managed to get something worki
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Any ideas would be gratefully appreciated.
I am still trying to get some earlier problems with this application solved.
Kind Regards
Jamie

Hi Jamie,
There are a couple different ways you can loop from a buffer. You can either use the onboard memory of the 6534 and loop from there or you can specify as a software configuration that the board loop through the PC memory buffer.
For the onboard looping you need to specify the following:
iStatus = Set_DAQ_Device_Info (1, ND_PATTERN_GENERATION_LOOP_ENABLE, ND_ON);
For software, PC memory looping, the following function specifies this:
iStatus = DIG_DB_Config (iDevice, iGroup, 1, 0, 1);
I attached a couple programs that might be of use. Check this post:
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=5065000000080000008BA10000&USEARCHCONTEXT_CATEGORY_0=_31_%24_12_&USEARCHCONTEXT_CATEGORY_S=0&UCATEGORY_0=_31_%24_1
2_&UCATEGORY_S=0
Hope that helps. Have a good day.
Ron

Planning Folders with multiple input and output layouts

Hi,
I have a planning folder with one input layout and 4 output layouts. The input layout has a GPS assigned to it which will be executed before layout change. Will this function get executed when I open any of the output layouts(out of 4) not necessarily the immediate output layout (next to the input layout) and will the calculated data be displayed accordingly. Can some one please confirm me on how that works.
Scenario2: I have one input layout and 2 output layouts. The input layout has a GPS assigned which will be executed before layout change and the first output layout has another GPS assigned which is basically a push button. Then how does this work.
Points will be assigned . Help is greatly appreciated.
Thanks,
Vamsi

GPS will not be executed when you open any of the output layouts but will be executed only when you open the input layout. Yes, the calculated data gets stored in planning buffer so it will the displayed in input/output layouts accordingly.
Scenario2: The GPS assigned to input layout will be executed when you open the input layout. GPS which is assigned to output layout in the form of a button will be only executed when user will click on that button. Calculated results will be available in all the layouts as the result remains in planning buffer until user explicitly click the 'SAVE' icon in applpication toolbar.

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I am designing an autotuning PID temperature control system whose PID gains are adjusted using a Multiple Input Multiple Output (MIMO) Fuzzy Controller. I am unsure how to set up specific inputs and how to use specific outputs when there are multiple inputs and outputs. Specifically, my Fuzzy system has two inputs and three outputs.
For the input, I have two 1D arrays of scalars (doubles) which I have used to build an array and concatanated the inputs to the array. How do I configure which values of this array are used as each specific input value to the fuzzy system?
Similarly, for the output, the fuzzy system gives three output values which are used as the PID gains. How do I configure these such that they are in the right order to be used as the PID Gains of the PID VI?

Hi natsmi,
You can find some examples by navigating to:
C:\Program Files (x86)\National Instruments\LabVIEW XXXX\examples\control\fuzzy
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Hope this helps.
Regards,
AGJ

Multiple input streams

hey folks newbie here
i am designing a client server program
with my client i want to send serialized objects & primitive types across the socket to the server
is it possible to creat two output streams on the same socket i.e an ObjectOutputStream & a DataOutputStream on the same socket, i have tried this but get some errors so i don't think this is possible
if not possible how would i be able to send both primitive types & serialized objects across the same socket

Forget about the first person's post. He his correct, but it is not the solution used by most developers.
Multiple Input Streams/Output Streams are easy to create. A better "management" deal would be like FTP - FTP uses two port, one for data and one for commands.
Socket objectSocket = new Socket("www.object-server.com", objectPort);
Socket dataSocket = new Socket("www.data-server.com", dataPort);
The server should implement a class which represents the connection of both sockets as a single client. Somethig like this:
public class Connection {
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    public Connection(Socket s1) {
        dataSocket = s1;
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        objectSocket = s2;
}You can then use this class (permission given to copy and use without license hereby granted) to manage the task.
There are also many other ways of doing this. You can also apply multiple i/o streams to the same socket - but your server/client needs to know which data type is being sent or to which stream the data needs to be read from.
Example: Client sends binary file to server (such as FTP)
ObjectOutputStream out = new ObjectOutputStream(socket.getOutputStream());
PrintWriter out2 = new PrintWriter(socket.getOutputStream());
The code above will work, but data send in one stream will not show up in the other stream. The server does the reverse for the input > adding different InputStreams to the socket, but when data is sent from the client's object stream both of the server's streams (BufferedReader or other text-based input) and the object stream will receieve the file, so you need to communicate between the client and server which stream to read from/write to.
Client: Send file via socket to server by means of ObjectOutputStream
Note: You should not need to implement the try-catch logic when passing the argument of the socket - since it would throw that in the class which was calling the constructor, but you CAN implement it here as long as it is not handled in the calling class. If you do, the complier should throw an error saying that the exception would not be thrown at this point.

RFC Assign Link As XML Multiple Input Error SAP JRA Function Call

I am using SAP MII 12.1.0 (Build 201)
I have a problem with SAP JRA Function Call Action in Link Assignment as assign XML.
I need to assign multiple input but from local xml property to my RFC table as assign XML
but when i am going to execute my transaction i am getting following errors.
[WARN] Data buffer filter for this action does not exist or the interface is incorrect.
[ERROR] Unable to make RFC call Exception: [com.sap.conn.jco.JCoException: (104) RFC_ERROR_SYSTEM_FAILURE: Transferred IDoc data records are empty (internal error) ]
[WARN] [SAP_JRA_Function_Upload_Material_Consumption] Skipping execution of output links due to action failure.
[ERROR] [UserEvent] : com.sap.conn.jco.JCoException: (104) RFC_ERROR_SYSTEM_FAILURE: Transferred IDoc data records are empty (internal error)
Please help me out in this issue.
Regards,
Manoj Bilthare

Dear Jeremy
Thanks for reply
My Problem is got solved that problem is due to version problem now the MII version is Version 12.1.4 Build(46).
Regards,
Manoj Bilthare

NI error -201133; Input and output on the NI9401

Former user of Matlab, it is the first time I try to work with the DAQ and national instrument. My device is a NI9401.
I want to record the position of 1 optical encoders. For this , the encoder is connected to counter in the 9401.
Here is how I proceed:
1/ I open a new DAQ session
2/ I add a counter channel, in order to make a clock (because, as I understood, to do a startForeground I have to configure a clock which will be associated with my data recording, am I right?
3/ I add a counter channel in order to have the data corresponding to the position of the encoder. But at this time I have the error message about the session reserved.
here is the code
//first I do the clock
ClockFreq=100;
sClk=daq.createSession('ni');
sClk.addCounterOutputChannel('cDAQ1Mod5',0,'PulseGeneration');
clkTerminal=sClk.Channels(1).Terminal;
sClk.Channels(1).Frequency=ClockFreq;
sClk.IsContinuous=true;
sClk.startBackground
//then
I configure the data input
s=daq.createSession('ni')
s.addCounterInputChannel('cDAQ1Mod5'),1,'Edgecount')
At this time I have the NI error -201133 message
Devices cannot be configured for input or output because lines and/or terminals on this device are in use by antoher task or route. This operation requires temporarily reserving all lines and terminals for communication, which interferes with the other task or route.
If possible, use DAQmx Control task to reserve all tasks that use this device before committing any tasks that use this device. Otherwise, uncommit or unreserve the other task or disconnect the other route before attempting to configure the device for input or output.
device : cDAQ1Mod5
Digital Port:0
Lines:3
Thus, my question is :
1/how can I configure both output clock and input counter in NI9401 directly using Matlab?
Thanks for your help.

If you want to do clocked counter input measurements you need to specify an external clock OR (if available) you can add an analog input channel from another module on the same chassis -- in this case the session shares an internal clock with both modules.
The external clock can be generated by a counter output channel in pulse generation mode, as you had session sClck configured. However, ther error you are running into could be due to using channels from the same counter subsystem (on the same module) in two separate sessions.
Can you try using the counter output channel from another module (if available)?
s = daq.createSession('ni');
s.addCounterInputChannel('cDAQ1Mod5', 1,'EdgeCount');
s.addClockConnection('External', 'cDAQ1Mod5/PFI2', 'ScanClock');
extClockFreq = 1E+3;
% this should match the frequency of the external clock
s.Rate = extClockFreq;
s.DurationInSeconds = 1;
[data, timestamps] = s.startForeground;
The alternative to using an external clock, as I mentioned, is to have one session with one counter input channel and an analog input channel from another module on the same chassis -- in this case the session shares an internal clock with both modules, so no external clock needs to be provided. Please see the following example:
http://www.mathworks.com/help/daq/examples/count-pulses-on-a-digital-signal-using-ni-devices.html

BOM and Production Order: Multiple Inputs to Multiple Outputs

Dear All, My client's industry required BOM and Production Order must be Multiple Inputs to Multiple Outputs. We propose to create customization program to work on it but client do not want any customizations. Any suggestions? SAP B1 8.81 PL13 Thank you very much in advance. Best Regards, Vivian

Hi,
Please advice your requirement with an example. There is possibility to input multiple components to produce single finished product.
Not sure you have checked with SAP help file. If not refer SAP help file and below blog.
http://scn.sap.com/community/business-one/blog/2014/03/01/how-to-implement-production-in-default-sap-business-one
Thanks & Regards,
Nagarajan

SSIS: How to use one Variable as Input and Output Parameter in an Execute SQL Task

Hello,
i need your help,I'm working on this issue since yesterday and have no idea how to deal with it.
As I already said in the tilte i want to start a stored procedure via a Execute SQL Task which has around 15 prameters. 10 of these should be used as input AND output value.
As an example:
i have three Variable:
var1    int        2
var2    int     100
var3    int     200
the stroed procedure:
   sp_test
     @var1 int
      @var2 int output
      @var3 int output
   AS
   BEGIN
        SET @var2 = @var2 * @var1
        SET @var3 = @var3 + @var1
   END
So in the Execute SQL Task i call the Stored Procedure as follwos:
    Exec sp_test  @var1 = ?, @var2 = ? output, @var3 = ? output
(I use an OLE DB Connection)
The parameter mapping is as follows:
User::Var1        input                   numeric              0                 -1
User::Var2        input/output         numeric              1                 -1
User::Var3        input/output         numeric              2                 -1
Now my problem. If i set  Var2 and Var3 as Input parameter the values are still the same after running the package. If i set them to a output value the are both Null because the procedure doesnt get any values.
I already tried to list them a second time - like
    User::Var2        input                  numeric              1                 -1
    User::Var2        output                 numeric              1                 -1
or i use a new variable
    User::Var2                  input                  numeric              1                 -1
    User::Var2Return        output                 numeric              1                 -1
but i alwas get the error
"Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done."
Has anybody an idea how I can solve this problem?
Thanks a lot.
Kind Regards,
Alice

Hi Alain,
thx for your answer.
I have around 15 procedures called one after the other to calculated and modify my values. Each procedure is responsible for an other but overlapping set of variables. So i thought it would be a good idea to call them one after the other with the needed variables via a execute sql task.
So if i use a result set, how i get my stored procedure to return 10 values? I would have to use a Function instead of a procedure, wouldn't i?
As if i have 15 procedures this would be a lot of work.
But thanks a lot for the idea. I think an other idea would be to create one function which calls all stored procedures and returns all the calculated values as a result set, wouldn't it?.
Kind Regards.
Alice

Input and output on same device, producer/consumer structure

Hello interested people,
I have a question about using the same device for both digital inputs
and outputs. I have written a simple program of one while loop
that continuously polls the device, processes, and requests. I
have addressed the device using two DAQmx Asst. and I have attached
them with their error in/out cluster terminals to provide data flow and
eliminate the chance of addressing the devices at the same time (which
produces an error). Now I want to change this program structure
to a producer/consumer loop foundation with state machine.
In this design, I will have the DI in the producer loop and the DO in
the consumer loop, under one of the states. I can't simply
connect the error in/out ports in this configuration, so my question is
how to avoid the error caused by addressing the same device
simultaneously with two different tasks (input and output)? I
have attached two VI's, the "One Loop" vi is the original configuration
(simplified), and the Producer-Consumer vi is a NONSENSICAL program
that simply represents the desired configuration. (I don't need
any comments on the programming of this vi, it is only an example for
illustration of the problem).
I am thinking about bundling the input data and the error cluster, both
from the PXI 6528 DI, into one cluster, queueing that up, and
unbundling the de-queued elements for some kind of data flow between
the producer loop and the "Request" state of the consumer loop.
Is this the right approach, or am I barking up the wrong tree?
Thanks
Attachments:
One Loop DO DI.vi ‏102 KB
Producer-Consumer DI-DO.vi ‏106 KB

Hello,
It sounds to me like you really have two modes:
1. user interface actions determine execution
2. user interface is locked, and execution is automated.
I think it would make sense to use the producer consumer for an architecture. Basically you would do the following:
1. program the producer to handle the user interface as you normally would.
2. provide one additional event case in the producer which would be your "automated handling" case. In that case, you could put a state machine which could run until whatever conditions were met to put your program back in "user interface mode".
Keep in mind that you can use custom USER EVENTS to programmatically generate events ie. you can trigger the start of your "automated handling" form anywhere in your code at virtually any time.
I think this would allow you to take advantage of the producer consumer architecture in its intended spirit, while integrating an automated routine.
I hope this helps!
Best Regards,
JLS
Best,
JLS
Sixclear

Wrong input and output files path?

When i tried to run my code i got wrong path of input and output files, why it was and where is the mistake? I did not meant the path \tmp\xorout.txt and C:\jar\org\joone\samples\engine\xor\xor.txt in the source code - where are they from? :
* XOR.java
* Sample class to demostrate the use of the Joone's core engine
* see the Developer Guide for more details
* JOONE - Java Object Oriented Neural Engine
* http://joone.sourceforge.net
package org.joone.samples.engine.xor;
import java.io.File;
import org.joone.engine.*;
import org.joone.engine.learning.*;
import org.joone.io.*;
import org.joone.net.NeuralNet;
public class XOR implements NeuralNetListener {
/** Creates new XOR */
public XOR() {
* @param args the command line arguments
public static void main() {
XOR xor = new XOR();
xor.Go();
public void Go() {
* Firts, creates the three Layers
LinearLayer input = new LinearLayer();
SigmoidLayer hidden = new SigmoidLayer();
SigmoidLayer output = new SigmoidLayer();
input.setLayerName("input");
hidden.setLayerName("hidden");
output.setLayerName("output");
/* sets their dimensions */
input.setRows(2);
hidden.setRows(3);
output.setRows(1);
* Now create the two Synapses
FullSynapse synapse_IH = new FullSynapse(); /* input -> hidden conn. */
FullSynapse synapse_HO = new FullSynapse(); /* hidden -> output conn. */
synapse_IH.setName("IH");
synapse_HO.setName("HO");
* Connect the input layer whit the hidden layer
input.addOutputSynapse(synapse_IH);
hidden.addInputSynapse(synapse_IH);
* Connect the hidden layer whit the output layer
hidden.addOutputSynapse(synapse_HO);
output.addInputSynapse(synapse_HO);
FileInputSynapse inputStream = new FileInputSynapse();
/* The first two columns contain the input values */
inputStream.setAdvancedColumnSelector("1,2");
/* This is the file that contains the input data */
inputStream.setInputFile(new File("c:\\xor.txt"));
input.addInputSynapse(inputStream);
TeachingSynapse trainer = new TeachingSynapse();
/* Setting of the file containing the desired responses,
provided by a FileInputSynapse */
FileInputSynapse samples = new FileInputSynapse();
samples.setInputFile(new File("c:\\xor.txt"));
/* The output values are on the third column of the file */
samples.setAdvancedColumnSelector("3");
trainer.setDesired(samples);
/* Creates the error output file */
FileOutputSynapse error = new FileOutputSynapse();
error.setFileName("c:\\xorout.txt");
//error.setBuffered(false);
trainer.addResultSynapse(error);
/* Connects the Teacher to the last layer of the net */
output.addOutputSynapse(trainer);
NeuralNet nnet = new NeuralNet();
nnet.addLayer(input, NeuralNet.INPUT_LAYER);
nnet.addLayer(hidden, NeuralNet.HIDDEN_LAYER);
nnet.addLayer(output, NeuralNet.OUTPUT_LAYER);
nnet.setTeacher(trainer);
FileOutputSynapse results = new FileOutputSynapse();
results.setFileName("c:\\results.txt");
output.addOutputSynapse(results);
// Gets the Monitor object and set the learning parameters
Monitor monitor = nnet.getMonitor();
monitor.setLearningRate(0.8);
monitor.setMomentum(0.3);
/* The application registers itself as monitor's listener
* so it can receive the notifications of termination from
* the net.
monitor.addNeuralNetListener(this);
monitor.setTrainingPatterns(4); /* # of rows (patterns) contained in the input file */
monitor.setTotCicles(2000); /* How many times the net must be trained on the input patterns */
monitor.setLearning(true); /* The net must be trained */
nnet.go(); /* The net starts the training job */
public void netStopped(NeuralNetEvent e) {
System.out.println("Training finished");
public void cicleTerminated(NeuralNetEvent e) {
public void netStarted(NeuralNetEvent e) {
System.out.println("Training...");
public void errorChanged(NeuralNetEvent e) {
Monitor mon = (Monitor)e.getSource();
/* We want print the results every 200 cycles */
if (mon.getCurrentCicle() % 200 == 0)
System.out.println(mon.getCurrentCicle() + " epochs remaining - RMSE = " + mon.getGlobalError());
public void netStoppedError(NeuralNetEvent e,String error) {
ERROR:
C:\jar>java -cp joone-engine.jar org.joone.samples.engine.xor.XOR C:\\xor.txt C:
\\xorout.txt
[main] [ERROR] - org.joone.io.FileOutputSynapse - IOException in Synapse 6. Mess
age is : \tmp\xorout.txt (The system cannot find the path specified)
Training...
[Thread-0] [WARN] - org.joone.io.FileInputSynapse - IOException in Synapse 3. Me
ssage is : C:\jar\org\joone\samples\engine\xor\xor.txt (The system cannot find t
he path specified)
[Thread-0] [WARN] - org.joone.io.FileInputSynapse - IOException in Synapse 3. Me
ssage is : C:\jar\org\joone\samples\engine\xor\xor.txt (The system cannot find t
he path specified)
java.lang.NullPointerException
at org.joone.io.StreamInputSynapse.getStream(StreamInputSynapse.java:176
at org.joone.io.StreamInputSynapse.readAll(StreamInputSynapse.java:288)
at org.joone.io.StreamInputSynapse.fwdGet(StreamInputSynapse.java:106)
at org.joone.engine.Layer.fireFwdGet(Layer.java:212)
at org.joone.engine.Layer.fwdRun(Layer.java:1225)
at org.joone.net.NeuralNet.stepForward(NeuralNet.java:1015)
at org.joone.net.NeuralNet.fastRun(NeuralNet.java:970)
at org.joone.net.NeuralNet.fastRun(NeuralNet.java:937)
at org.joone.net.NeuralNet$1.run(NeuralNet.java:890)
at java.lang.Thread.run(Thread.java:534)

c:xor.txt
c:/xor.txt
i think c:xor stands for somthing else like a virtual drive but ima not sure

Synchronize input and output tasks to start at the same sample point [C++ NI_DAQmx Base]

I'm trying to initiate the analog input and output streams to start reliably at the same sample. I've tried triggering the output from the start of the input using the following code [NI-DAQmx Base 2.1 under Mac OS X with an M-Series multifunction board]. It compiles and runs, but gives an error message at the call to "DAQmxBaseCfgDigEdgeStartTrig". Any suggestions about synchronized I/O on this platform?
#include "NIDAQmxBase.h"
#include
#include
#include
#define DAQmxErrorCheck( functionCall ) { if ( DAQmxFailed( error=( functionCall ) ) ) { goto Error; } }
int main( int argc, char *argv[] )
// Task parameters
int32 error = 0;
TaskHandle inputTaskHandle = 0;
TaskHandle outputTaskHandle = 0;
char errorString[ 2048 ] = {'\0'};
int32 i;
time_t startTime;
// input channel parameters
char inputChannelList[] = "Dev1/ai0, Dev1/ai1";
float64 inputVoltageRangeMinimum = -10.0;
float64 inputVoltageRangeMaximum = 10.0;
// output channel parameters
char outputChannelList[] = "Dev1/ao0, Dev1/ao1";
char outputTrigger[] = "Dev1/ai/StartTrigger";
float64 outputVoltageRangeMinimum = -10.0;
float64 outputVoltageRangeMaximum = 10.0;
// Timing parameters
char clockSource[] = "OnboardClock";
uInt64 samplesPerChannel = 100000;
float64 sampleRate = 10000.0;
// Input data parameters
static const uInt32 inputBufferSize = 100;
int16 inputData[ inputBufferSize * 2 ];
int32 pointsToRead = inputBufferSize;
int32 pointsRead;
float64 timeout = 10.0;
int32 totalRead = 0;
// Output data parameters
static const uInt32 outputBufferSize = 1000;
float64 outputData[ outputBufferSize * 2 ];
int32 pointsToWrite = outputBufferSize;
int32 pointsWritten;
for( int i = 0; i < outputBufferSize; i++ )
outputData[ 2 * i ] = 9.95 * sin( 2.0 * 3.14159 * i / outputBufferSize );
outputData[ 2 * i + 1 ] = -9.95 * sin( 2.0 * 3.14159 * i / outputBufferSize );
// ------------------- configure input task -----------------------
DAQmxErrorCheck ( DAQmxBaseCreateTask( "", &inputTaskHandle ) );
printf( "Created input task\n" );
DAQmxErrorCheck ( DAQmxBaseCreateAIVoltageChan( inputTaskHandle, inputChannelList, "", DAQmx_Val_RSE, inputVoltageRangeMinimum, inputVoltageRangeMaximum, DAQmx_Val_Volts, NULL ) );
printf( "Created AI Voltage Chan\n" );
DAQmxErrorCheck ( DAQmxBaseCfgSampClkTiming( inputTaskHandle, clockSource, sampleRate, DAQmx_Val_Rising, DAQmx_Val_ContSamps, samplesPerChannel ) );
printf( "Set sample rate\n" );
// ------------------- configure output task -----------------------
DAQmxErrorCheck ( DAQmxBaseCreateTask( "", &outputTaskHandle ) );
printf( "Created output task\n" );
DAQmxErrorCheck ( DAQmxBaseCreateAOVoltageChan( outputTaskHandle, outputChannelList, "", outputVoltageRangeMinimum, outputVoltageRangeMaximum, DAQmx_Val_Volts, NULL ) );
printf( "Created AO Voltage Chan OK\n" );
DAQmxErrorCheck ( DAQmxBaseCfgSampClkTiming( outputTaskHandle, clockSource, sampleRate, DAQmx_Val_Rising, DAQmx_Val_ContSamps, samplesPerChannel ) );
printf( "Set sample rate\n" );
// trigger output when input starts
DAQmxErrorCheck ( DAQmxBaseCfgDigEdgeStartTrig( outputTaskHandle, outputTrigger, DAQmx_Val_Rising ) );
printf( "Set output trigger\n" );
// ------------------- configuration -----------------------
// write output signal
DAQmxErrorCheck ( DAQmxBaseWriteAnalogF64( outputTaskHandle, pointsToWrite, 0, timeout, DAQmx_Val_GroupByScanNumber, outputData, &pointsWritten, NULL ) );
printf( "Write output signal\n" );
// set up input buffer
DAQmxErrorCheck ( DAQmxBaseCfgInputBuffer( inputTaskHandle, 200000 ) ); // use a 100,000 sample DMA buffer
// initiate acquisition - must start output task first
DAQmxErrorCheck ( DAQmxBaseStartTask( outputTaskHandle ) );
DAQmxErrorCheck ( DAQmxBaseStartTask( inputTaskHandle ) );
// The loop will quit after 10 seconds
Dr John Clements
Lead Programmer
AxoGraph Scientific

Hi Michael,
First of all, thanks very much for taking the time to investigate this problem! Much appreciated.
You asked for "an actual error code you got and any description that is given". The full output from the program that I posted earlier in this thread is appended to the end of this message. In summary, following the call to...
DAQmxErrorCheck ( DAQmxBaseCfgDigEdgeStartTrig( outputTaskHandle, outputTrigger, DAQmx_Val_Rising ) );
... with ...
char outputTrigger[] = "Dev1/ai/StartTrigger";
...the error message is ...
DAQmxBase Error: Specified route cannot be satisfied, because the hardware does not support it.
You asked "specifically which M series device you are using"? It is the PCIe 6251 (with BNC 2111 connector block). I'm testing and developing on an Intel Mac Pro (dual boot OS X and Windows XP).
You asked for "the location you pulled the code from". Here it is...
http://zone.ni.com/devzone/cda/epd/p/id/879
...specifically from the file "Multi-Function-Synch AI-AO_Fn.c".
I adapted the NI-DAQmx calls to their NI-DAQmx Base equivalents.
Finally, you asked "Is the trigger necessary, or do you just need to know that the measurements are running on the same clock?". I believe that some kind of sychronized trigger is necessary in my situation (correct me if I'm wrong). Timing is crucial. Say I initiate an analog output stream that delivers a voltage command step 5 ms from the onset. I need to record the response (analog input stream) so that its onset is accurately aligned (synchronized) at 5 ms. A typical recording situation would stimulate and record a short data 'sweep', then wait for the (biological) system to recover, then stimulate and record another short sweep, and repeat. I need all the recorded sweeps to align accurately so that they can be averaged and analyzed conveniently.
I definitely do not want my customers to rely on an expensive external TTL pulse generator to initiate and synchronize each 'sweep'. That would effectively eliminate the cost advantage of an NI board, as well as adding unnecessary complexity in setup and use. It would be a show-stopper for me.
It seems perverse, but would it be possible to use a digital output channel connected directly to a digital input chanel to trigger the input and output streams?
Regards,
John.
Full output from test program. Compiled with gcc 4 under OS X...
[Session started at 2007-05-23 14:17:01 +1000.]
LoadRuntime: MainBundle
CFBundle 0x303cc0 (executable, loaded)
_CompatibleWithLabVIEWVersion: linkedAgainst: 08208002
_CompatibleWithLabVIEWVersion: result= false, mgErr= 1, theActualVersion= 00000000
_CompatibleWithLabVIEWVersion: linkedAgainst: deadbeef
_CompatibleWithLabVIEWVersion: Reseting Linked Against
_CompatibleWithLabVIEWVersion: linkedAgainst: 08208002
_CompatibleWithLabVIEWVersion: result= true, mgErr= 0, theActualVersion= 00000000
_CompatibleWithLabVIEWVersion: linkedAgainst: 08208002
_CompatibleWithLabVIEWVersion: result= true, mgErr= 0, theActualVersion= 00000000
com.ni.LabVIEW.dll.nidaqmxbaselv
CFBundle 0x313760 (framework, loaded)
{type = 15, string = file://localhost/Library/Frameworks/nidaqmxbaselv.framework/, base = (null)}
Amethyst:Library:Frameworks:nidaqmxbaselv.framework
2007-05-23 14:17:02.248 test-ni[4445] CFLog (21): Error loading /Library/Frameworks/LabVIEW 8.2 Runtime.framework/resource/nitaglv.framework/nitaglv: error code 4, error number 0 (no suitable image found. Did find:
/Library/Frameworks/LabVIEW 8.2 Runtime.framework/resource/nitaglv.framework/nitaglv: mach-o, but wrong architecture)
CFBundle 0x1751fdc0 (framework, not loaded)
Created input task
Created AI Voltage Chan
Set sample rate
Created output task
Created AO Voltage Chan OK
Set sample rate
DAQmxBase Error: Specified route cannot be satisfied, because the hardware does not support it.
test-ni has exited with status 0.
Dr John Clements
Lead Programmer
AxoGraph Scientific

Simultaneous Digital Input and Output from NI 9403

Hi,
I was wondering if it is possible to digital output through one line in this module(NI 9403) while simultaneously reading from 10 other lines?
Basically what I need is for line0 to always be closed(true), and read lines1:10 - at very least 1sample/second.
I have attached a stripped down version of my code illustrating my error. I thought I was getting the error because the two tasks were using different clock configurations, but I tried using the same inputs and that doesn't work for me.
Any input is greatly appreciated.
Thank you
Attachments:
Digital I-O.vi ‏22 KB

Hi Matthew,
The behavior you're seeing is expected for the 9403 module, since it is a serial module. The DAQmx help has the following restrictions in the Digital I/O Considerations for C Series Devices section.
Timed digital input/output restrictions:
You cannot use parallel and serial modules together on the same hardware timed task.
You cannot use serial modules for triggering.
You cannot do both static and timed tasks at the same time on a single serial module.
You can only do hardware timing in one direction at a time on a serial bidirectional module.
So you can only do timed input or output at one time, but not both. However, based on the VI you attached and the description of what you want to do, you don't necessarily need both timed tasks in your loop. You can create a static output task to update that one line and after that, you can just start your timed input task on the rest of the lines. This should maintain the state on the DO line, since you're not acquiring from it.
Cheers,
Cristina
Cristina

MULTIPLE INPUT ERROR (2 INPUT 1 OUTPUT ERROR)

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