Novice

Hello, Can someone tell me if it is possible to create one DAQmx task with both an input and an output channel? And if so, how to write and read to those channels? Thanks in advance. Regards, Novice.

Hello Didierj, At first, thank you for your fast reply! :worship: Regarding the PID task which should running at 150 Hz is not a big issue because the output (DAQ OUT) is forwarded to a servo controller which has a much faster PID controller by itself. Some tests already show me that the PID task is "very" stable. I was more curious about the fact how people deal with "communicating" between the different processes (DAQ reading, PID controlling, DAQ writing, etc.). In LV there are a lot of possible solutions for that kind of projects I think, but maybe people have some good experiences with a certain approach? Maybe someone has some examples of similar projects? Thanks in advance. Regards, Maarten

Hello, For a project I need to control (PID) some servo motors by reading the set point from a file at intervals of 0.1 seconds (10 S/s). Beside that the process variable is, or should be, readed at about 10 kS/s from the DAQ 1 in. The control output should writing to the DAQ OUT at 150 S/s. The DAQ 2 IN and DAQ 3 IN are readed at 48 kS/s and forwarded to a calculation and a file block. See att. for a simplified block diagram. Because of the blocks running at different time intervals, I was wondering which architecture (master / slave or producer and consumer) would be most suitable for this kind of project? Beside that, is it possible to achieve some kind of synchronisation of the different DAQ IN blocks so the recorded data can be compared in a meaningful way? Could someone give me some ideas and maybe some examples? Many thanks in advance. Greets, Maarten

Hello, I was trying to put a picture (icon) on the OK control button, which looks allright when designing the front panel (customize). After building the application there was no icon, but just an empty box, visable on the PDA itself?! My goal is to have a menu with icons which can be clicked. Has anybody an idea how to solve this? Thanks in advance. Best regards.

Hello, When programming an application with the PDA module for Labview 7.1 I discovered that the Front Panel is not easy to set for a PDA screen size. When dragging and dropping controls etc within the front panel the window is resized and/or moved and has to resized and moved afterwards to have a nice centered and full screen when building the application. Does someone experienced this as well and maybe has some ideas and/or work arounds for this? Any help will be welcome. Thanks in advance.