Search the Community

Showing results for tags 'quadrature'.

More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


  • DAQFactory
    • Alarming
    • Channels, Conversions and general data acquisition
    • Graphing
    • Logging
    • Modbus
    • Networking: web, email, FTP etc.
    • PID
    • Screen Components and User Interface
    • Sequences and scripting
    • Serial Communications
    • General DAQFactory
    • DAQFactory and the LabJack
    • DAQFactory Express
    • DAQConnect
    • DAQFactory New Feature Requests
    • The DAQFactory Guru's Articles
    • DAQFactory Newletters

Find results in...

Find results that contain...

Date Created

  • Start


Last Updated

  • Start


Filter by number of...


  • Start





Website URL







Found 1 result

  1. Hi, I'm trying to understand how to get the MSW for two quadrature channels streamed into a U6. I have done this for a single quadrature encoder and there are no issues. Two quadrature inputs need 4 timers to be used, so I've set up four Timers 0 thru 3 in Mode 8 ( quadrature). So far so good. The LSW of the quadrature count is then read from the special stream channels 200 (Timer0) and 202 (Timer2) . I have created channels with a timing of 0 in the DF channel table. The confusion begins when one needs to read the MSW of Timer0 and Timer2 The MSW is available in the special Channel No 224 ( TC_Capture), which has to be read after the LSW. So, for a single quadrature counter, the stream channel list would be (200,224), and data from these "registers" would be stuffed ino the DF channels with the corresponding channel nos. The channel table then looks like this:( and works if you want to stream a sigle quadrature encoder) Name Device Device Number I/O Type Channel Timing ChA1 LabJack 0 A to D 200 0 ChA2 LabJack 0 A to D 224 0 One then can obtaine signed 32bit 2's complement using the data from ChA1 and ChA2. However, when we need to stream two quadrature encoders, the stream list would be (200,224,202,224) and set by these statements: AddRequest(ID, LJ_ioADD_STREAM_CHANNEL, 200, 0, 0, 0) AddRequest(ID, LJ_ioADD_STREAM_CHANNEL, 224, 0, 0, 0) AddRequest(ID, LJ_ioADD_STREAM_CHANNEL, 202, 0, 0, 0) AddRequest(ID, LJ_ioADD_STREAM_CHANNEL, 224, 0, 0, 0) How then do I read ( and distinguish between ) the MSW corresponsing to Timer0 and Timer2? What DF "Channel" do I assign to the TC_Capture of Timer2? Any help will be much appreciated! Regards Arjun