hurang

hi. I am a Labview beginner. I want to create a program that processes data collected by mcc equipment. Could you please help? I expressed the algorithm I wanted to create in a pdf file. I made a little bit of vi with my little knowledge, but it's not enough. Please help me. thank you. labview question.pdf data input.vi

Hello, I am currently working with a DAQ device(USB-1808X, USB-2020) from MCC and using LabVIEW to create a block diagram for data storage. My specific requirement is to save data every hour, 10 times, for a duration of 1 minute each time. In essence, if I measure for 5 hours, I should have 50 sets of data, each 1 minute long. However, I'm encountering difficulties in designing the block diagram to meet this specific requirement. Can anyone provide some guidance or assistance on how to set this up? I would greatly appreciate any help! Best regards, DAQ_qna.vi

First and foremost, I'd like to express my sincere appreciation for your detailed response to our previous inquiry. Your insights and guidance have been invaluable to us. 1.In your last response, you recommended to "Reduce the USB-2020 sample rate." However, our target sampling rate must be at least 1MHz. When operating simultaneously on USB-2020, the signal abruptly stops working after about 2 seconds, with an error appearing specifically on the 2 channels of the USB-2020, as shown in the attached photo (See Attachment 1). 2. Could the computer specifications possibly influence the reading of the data? I will attach a photo (See Attachment 2) of my laptop's specifications for your reference." 3. In your previous feedback, you mentioned to "Increase the USB-2020 buffer size to 8,000,000." Could you explain the rationale behind setting the buffer size to this specific number? I've included a snapshot for your reference (See Attachment 3). 4. You also advised to "Record one file for each device." We intend to receive data for each channel in separate folders. Could you elaborate on the reason for your recommendation? 5. In a previous response, you explained the importance of timing and buffer management when using multiple DAQ devices simultaneously, highlighting the roles of the ULx Timing VI and ULx Read VI. You stated that the ULx Timing VI is used for buffer size setting, and the ULx Read VI is used to request data from the buffer. How should these ULx be configured when aiming to receive data from 6 channels simultaneously, with the 2 channels corresponding to the USB-2020 requiring a minimum sampling rate of 1MHz? I look forward to your insights on these matters. Once again, thank you for your unwavering support and guidance. We truly appreciate your assistance in helping us tackle these challenges. Warm regards,

Thanks for your reply! Both devices work well at first, but after 1 second, the signal from the USB-2020 device does not appear. I received the same amount of data as you recommended. There is no buffer error. I will attach the VI I created. thank you. USB2020_USB1808x.vi

I want to receive analog input from one labview Vi at the same time through two DAQ devices (USB-2020, USB-1808x). However, only USB-1808x works, USB-2020 does not work. I need to receive 2 analog inputs from USB-2020 and 4 analog inputs from USB-1808x. Each device works fine in each vi, but when combined into one, only one works. I tried combining each device by creating a sub vi, but it didn't work. Can you help me with this problem?