LabVIEW Serial Communication LabVIEW Serial Communication Brought to you by: embeddedlab. LabVIEW Serial Communication. LabVIEW is a graphical programming environment by National InstrumentsTM used by millions of engineers and scientists to develop sophisticated measurement, test, and control systems using. I need to simply write a command and then read the response. Im attempting to interface with a simple serial device. Simple Serial Communication.
I/O Control of instruments and equipment. Utilize LabVIEW Built in driver library and industry standard device driver software , But for GPIB（ Universal interface bus ）、Ethernet（ Ethernet ） Interface 、RS-232（ Standard serial interface bus ）/RS-485 etc. Get project updates, sponsored content from our.
I fould one document that guild to communicate with Atlas copco controller you can find more detalied. Since I am trying to get a detailed of of tightening result to logging into LabVIEW. LabVIEW communication with Atlas Copco controller by Using Serial Communication referring open Atlass protocol.
VISA yes Virtual Instrument Software Architecture For short , It's made up of VXI plug & play System Alliance 35 By the largest instrument company I/O Interface software standards and related specifications. TxD Send data for ,RxD To receive data ,GND For the earth terminal. Although this is slower than parallel communication, which allows the transmission of.With the help of computers RS-232 Serial port , The hardware connection line to realize the communication between two computers is shown in the figure below , This is the simplest three wire connection. The serial port sends and receives bytes of information one bit at a time.
Error in and error out The string contains the error condition. Return count Returns the number of bytes actually transferred. VISA Write Module handle write buffer String in （ Command or data ） write in VISA Resource Name The device specified by the end parameter. Please refer to LabVIEW Help document for3. Send VISA The serial port specified by resource name is initialized according to specific settings. MAX Can be used to configure VISA Resource name.
Open and VISA The session connection of resources will also occupy the system resources of the computer , So when VISA At the end of the program , All open session channels must be closed. VISA Bytes at Serial Port Returns the number of bytes in the input buffer of the specified serial port. Byte count Indicate to read in read buffer The number of bytes in.
Wait for the number of milliseconds of the specified length , And returns the value of the millisecond timer. Find the waiting in the timing module (ms) Sub module , Put in while Delay in the loop. This function is closed by VISA Resource Name The communication process of the device specified by the end parameter , Release VISA Session Occupied computer system resources.
NI MAX namely NI Configuration management software (Measurement & Automation Explorer), It is mainly used to configure and manage various software and hardware resources on local and remote systems. It can be opened after loading NI MAX, Under the software module, you can view some software that has been installed , You can see NI-VISA It's set up. If the following error pops up when running the program , No installation VISA drive , Can be in here Download the appropriate VISA The driver. After connecting all the modules , Click the run button. Pay attention to the conditional structure (case structure) Of false Under the conditions, we should also connect well to VISA Close The line of the module , Otherwise it will go wrong. Add boolean type OK button and stop button , Change the property to “ Keep switching until you release ”, That is, it will change when you press down true, The release will change falseAdd to 4 Number constants ： Programming （Programming）→ The number （Numeric）→ Numerical constants （ Numerical constants （Numeric Constant）, Values, respectively 9600（ Baud rate ： Baud rate is defined as the number of bits per second to transmit binary numbers , Take the place of / second （bit/s） In units of , Also known as “ potter ”.）、8（ Data bits ）、0（ Check bit , nothing ）、10（ Corresponding to stop bit 1）.Add a comparison function , Match the number of bytes in the input buffer with 0 Compare , Only if the number of data received by serial port buffer is not equal to 0 when , Read the data into the receiving area.
Such as 1d, It's binary ：0001 1101, Then the number from right to left represents the 1,3,4,5 Port occupied. In the dialog box “regedit” Enter the registry Then enter HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\COM Name Arbiter Then we can find the numerical term ：ComDB, Its value represents the serial port pin number currently in use. According to the method on the Internet, clear the serial port configuration by deleting a numerical key in the registry ： stay “ function ” Enter. Online to find the relevant reasons and solutions , Probably because the serial port is occupied. Run again or pop up an error , As shown in the figure below.
Labview Serial Communication Download InstallationNI Configuration
On the right is a waveform chart , Inside the program, the data sent by the serial port each time , With f% format , It's shown on the waveform chart. Program interface : Function is introduced : Upper left serial port receiving area , Below is the serial port character sending area. LabVIEW An example of serial communication - A serial port ' Oscilloscope '1. LabVIEW Serial port instrument control —VISA Driver download installationNI Configuration management software MAX Introduction to some functions ofLabview getting started LabVIEW More articles about serial communication Take USB To the serial line RXD and TXD We'll have a stand-alone test together , As shown in the figure below , Write a string in the send area "hello,world!" Then click the send character button to send , The receiving area will display the sent string. And then in the device manager through the serial port “ attribute ” Medium “ senior ” To reconfigure the port number.
Little grass teaches you LabVIEW Serial port instrument control — Install and use the existing driver of the instrumentStatement : Many instruments are not driven. Theoretical knowledge in books is a waste of time these days. At first it was imitation. Many people learn a technology , All like ready-made examples to start with , For example, learning SCM , It's all examples of modification at the beginning , The language learners are also. Little grass teaches you LabVIEW Serial port instrument control — First time to know VISA A serial portSome people , When learning something , Like ready-made examples.
LABVIEW Serial communication foundationThe opportunity to write this article on the basis of serial communication is that we have just finished the instrument control program of a incubator ,LABVIEW Through the serial port and the temperature box microcontroller communication , I plan to list some problems and gains encountered in the process here to facilitate the comparison of netizens in need. Under normal circumstances , You have installed LabVIEW, It's all without VISA drive. Some instruments may not need VISA, Have their own DLL What? , I don't care. Hand to hand LabVIEW Serial port instrument control —VISA Download and install the driverInstrument control , The core is VISA function. Therefore : Don't confuse the concepts. Another statement : The so-called drive , That is the packaged bottom serial communication program , It's just a procedure , It's just that someone else made it for you VI, Make it easy to use.
And the communication between the devices is the use of serial port or network (Socket) The way. Labeling machine and other hardware.
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