Low level control of serial port?

Hi there,
We're using LabVIEW 7.1 and I would like to control some low level aspects of the serial port (I'm having a LOT of difficulty connecting to an ABU93 autoburette). Is there a way to set the DTR, DTS RTS and CTS in LabVIEW 7.1? Is this controllable through VISA?
Thanks for any help,
Russ

The serial lines cannot be adressed using the Configure serial port VI. You need to dig a little deeper, and access the modem property node.
See the attached vi.
CC
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
Serial line settings.vi ‏35 KB

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Motion Control via Serial Port

I have previously developed an automated video microscope application in Labview. It worked great. My setup was: NI PXI system with 1409 image board, 7344 motion controller, 7764 breakout box, stepper motors, motor drivers, and tables. Now, a customer is requiring that we use a specific brand of drivers that encompass a motion controller and are daisy-chained together. Communication will take place from a serial port, thereby bypassing the 7344. My question is: will I have to can my entire previous Labview motion/data acquisition program b/c I won't be using the 7344 controller? Or, will it be easy to specify in the program to commmunicate via the serial port rather than the card? Would this setup take place in MAX, or in the LabView applicatio
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Rob,
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In general you will have to use low level serial communication (VISA). That means you have to read the drive/controller manual, identify the serial command strings you need and send them to the device.
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Hi to all,
I've an important question, my PC (Satellite 5100-503) does not works properly for PCMCIA slot when I want to controll it at low level by means Jungo Drivers (writing and reading of a particular address space for Compact Flash Card device), for others LAP TOP PC (HP) my program works properly.
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So now I decided to move to a little hardware
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Attachments:
Basic Serial Write and Read1.vi ‏23 KB

Hi Sunny,
the output of the PID is a number used to set an actuator. In your case you have to send that number to your motor control board, which expects strings (not any kind of HEX)! As you already gave examples of the expected strings you would use a FormatIntoString function to form the proper commands.
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Hi,
How can I close or open switches HLSELECT and 1WIRE of SCXI-1127 manually? There is a VI(1WireINDEP) which uses CIN to activate these switches. This VI allows to activate HLSELECT and 1WIRE relays when the SCXI 1127/1128 is used in 1 wire mode as a 64x1 multiplexer. The 1WIRE relay will always connect to 1wirelowref signal. The HLSELECT will connect to Com0+ when H-L Channels is set to Channels 0-31 and to Com0- when H-L Channels is set to Channels 32-63.
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1wireINDEP.vi ‏48 KB

Thanks for your reply. My problem is not that simple.I am using NI-SWITCH1.6 and need to continue using it. Can't I just use this VI as sub VI and call it? Here is my problem:
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Attachments:
Channel_combinations.doc ‏41 KB

Time out function in VISA configure serial port vi

I have some doubts regarding the time out functionality of "VISA configure serial port vi":
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1. A read will return when the first of the following is satisfied:
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Can't find a PCI-serial port

Hello:
I am using a PCI-Serial card to control a serial-port stage, I can not find the serial port with Labview8.0. Windows can find this serial port. When I use the same Labview program in my old computer which has a serial port on board, it can be recognized. Shall I change something of the 'Visa serial' communication module?
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Attachments:
ZaberLabview8Demo.zip ‏77 KB

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Hi freaky-namuh, welcome to the forum
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Andy ______________________________________
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Low Level Serial Port Access

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Some MIDP 1.0 devices support access to the Serial
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Can you explain the hierachy of your symbols? By this I mean, name of your symbol and any symbol inside and any symbol inside nested symbol and what event you are triggering from where?

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Thank you for your answer.
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How to add control buttons using Java thorugh serial port?

Hi everyone,
I'm new to this forum.
I have some questions on Java and serial port.
I want to write a Java program to control my robot, through serial port. For example, when I click "Forward", the robot will go forward, and so on.
Now I already have the buttons, so next I would like to ask how to interface the buttons with the serial port.
I already have all the javax.comm things installed.
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import java.awt.*;
public class ControlButtons extends java.applet.Applet
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The plan is, I have a robot device connected to the serial port.We don't know anything about that device. We don't know how to control it. We don't know what you have to write to the device to make it do anything. Only you know what.
For example, when I click "Forward", the robot will go forward, and so on.So what do you have to send to make it do that? and same for the other buttons.
Next, you need to work out from the javax.comm API how to open the serial port and send data to it. This is a standard exercise in learning a new API. You must be able to do this. Again and again.
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You have to write all that. So you also have to look up ActionListener in the Java API and how to attach it to a button. You can do that. We all do that kind of thing every day.
So next I would like to ask how to interface the buttons with the serial port.You've been asking nothing else since you started, but you've also only done enough investigation of your own to create the buttons. That's only the start.
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Serial port control

hello
is it possible to control, using labview, the inputs and the outputs of a serial port as they were simple digital on/off channel?
for example in order to use them to turn on/off a relay or to read the state of a switch
I've searched among the labview examples but they show only complex communication to an hardware using strings...
thankyou in advance
paolo
Solved!
Go to Solution.

You can control the handshaking lines Request to Send (RTS) and DTE Ready (DTR). You can read the handshaking lines DCE Ready (DSR) and Clear to Send (CTS) as digital inputs.
They are accessed through property nodes of the VISA reference under Serial Settings / Modem Line settings.
Be careful of any loads you apply to them or signals you enter in terms of voltage and current so you don't fry your computer.
Message Edited by Ravens Fan on 09-10-2009 04:27 PM
Attachments:
Example_VI_BD.png ‏2 KB

How can I control a HP 33120A waveform generator with the serial port of my PC?

Hello,
I want to control a HP 33120A waveform generator with my PC using the serial port. I don't have any idea about how to do it. If you've done it or if you know how I can do it, please give me some indications.
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The answer to your cross-post in the LabVIEW General group seems to be right on the money:
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=50650000000800000032200000&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0
Regards,
John Lum
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Low level control of serial port?

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