labview - Reading CI Frequency In C# With NI USB-6363 -


working labview code

attached above labview code have used in past read frequency data device. use start task vi between property node , while loop.

i trying code in c#. far have been able code analog output's , analog input's on device, usb-6363, (so know able write , read data device c#).

i have used multimeters (grainger link @ bottom of post) read frequency data (orange hz mode device set in picture).

however, c# code seems having issues reading frequency data. c# code attached. when try running program following error. same error when using example program called 'measdigfreqbuffcont_extclk_armstart.2013'. code show creating task, call code later in program in different section , how getting error.

------------------------------------------------- begin error code -------------------------------------------------

{error=-200077 message="requested value not supported value property. property value may invalid because conflicts property.\n\nproperty: nationalinstruments.daqmx.cichannel.frequencydivisor\nrequested value: 1\npossible values: 4 4294967295\nchannel name: digital frequency\n\ntask name: _unnamedtask<0>\n\nstatus code: -200077"}

------------------------------------------------- end error code --------------------------------------------------

in example program asks sample clock source (a pfi channel device). in labview code not ask this. example maybe more in detail trying do?

task frequencyinput = new task();  frequencyinput.cichannels.createfrequencychannel(                 "dev1/ctr0",                 "digital frequency",                 200,                 15000,                 cifrequencystartingedge.rising,                 cifrequencymeasurementmethod.dynamicaveraging,                 0.001,                 1,                 cifrequencyunits.hertz                 );   frequencyinput.cichannels["digital frequency"].frequencyterminal = "/dev1/pfi0";  countersinglechannelreader counterfreq = new countersinglechannelreader(frequencyinput.stream);   double counterfreqdata = counterfreq.readsinglesampledouble();  txtpfi0.text = convert.tostring(counterfreqdata);

fluke (r) fluke-115 compact - basic features digital multimeter, 14° 122°f temp. range

formatting error message:

requested value not supported value property. property value may invalid because conflicts property.

property: nationalinstruments.daqmx.cichannel.frequencydivisor
requested value: 1
possible values: 4 4294967295

task name: _unnamedtask<0>
status code: -200077

according documentation, asking device use invalid divisor. change 1 4:

frequencyinput.cichannels.createfrequencychannel(                 "dev1/ctr0",                 "digital frequency",                 200,                 15000,                 cifrequencystartingedge.rising,                 cifrequencymeasurementmethod.dynamicaveraging,                 0.001,    /* here */   4,                 cifrequencyunits.hertz                 );

ni installs c# examples daqmx, , includes 1 measuring frequency:

c:\users\public\documents\national instruments\ni-daq\examples\dotnet4.0\counter\measure digital frequency\measdigfrequency_lowfreq1ctr\cs


Comments

Post a Comment

Popular posts from this blog

asynchronous - C# WinSCP .NET assembly: How to upload multiple files asynchronously -

i using winscp .net assembly uploading files. want upload multiple files asynchronous way. have created method works single upload. public class uploadingdata { private sessionoptions _sessionoptions; private session _session; //connection etc private void onconnected() { foreach (var fileinfo in localfileslist) { var task = task.factory.startnew(() => uploadfilesasync(fileinfo)); } } private async task uploadfilesasync(string file) { string remotefilepath = _session.translatelocalpathtoremote(file, @"/", "/test_data_upload"); var uploading = _session.putfiles(file, remotefilepath, false); //when done await task.run(() => thread.sleep(1000)); } } please suggest me correct way. thanks you can use backgroundworker class this: string[] images = new string[50]; foreach (var path in images) { backgroundworker
Read more

aws api gateway - SerializationException in posting new Records via Dynamodb Proxy Service in API -

i getting "__type": "com.amazon.coral.service#serializationexception" as reply in postman & in test console in api gateway trying post record directly dynamodb using api proxy services.. referring aws article - https://aws.amazon.com/blogs/compute/using-amazon-api-gateway-as-a-proxy-for-dynamodb/ here's mapping { "tablename": "tablenamegoeshere", "item": { "id" : "$context.requestid" "eventname" : "$input.path('$.eventname')", "timestamp" : $input.path('$.timestamp'), "answers": "$util.parsejson($input.path('$.answers'))" } } update: did asked ... , worked if try add array of json objects gives me above same error - here's trying now. please - couldnt find on google well #set($inputroot = $input.path('$')) { "tablename": "answer", "item": {
Read more

asp.net - Problems sending emails from forum -

i have been redesigning site has message board, has been written guy looked after site. it has few problems , written in .asp , uses .mdb files database. you can see whole thing here . feel free post if helps, test thing have set using original files , new database. the basic problem when posts message, supposed email sent them, have posted it. when replies, originator supposed message, replier has been posted. i’d have thought @ point in process there should script/file in postmessage.asp? the postmessage.asp page below. <% option explicit %> <!-- #include virtual="common/adovbs.inc" --> <html> <head> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="microsoft frontpage 4.0"> <meta name="progid" content="frontpage.editor.document"> <title>new page 2</title> <base target="_self"
Read more