T23- A real challenge- Serial Port

Hi, I have a interesting problem with a T23 running Windows 2000 Professional. The Bios is updated to the latest version. I am running a Gas Chromatograph using software called Peak Simple Controlling an SRI GC through the serial port. All assignments are correct and I have verified data is being sent and received through the serial port via a utility. Here is the problem: it works great while running on the battery but communication when I plug it in. While plugged in, the T23 and GC simply will not get along. When I unplug and run on battery, it connects in seconds. I have tried a different T23, changed the power supply and battery and still get the same problem. I tried changing the IRQ and even the Com assignment. Same problem. I really like these old ThinkPads and want to continue using them. Please help if you can...I have a Dell sitting on my desk and don't want to give up just yet. Thanks!!!!
Solved!
Go to Solution.

My initial thought is that you're dealing with some sort of ground loop problem. You can try the following things to see if they help:
- assuming that you are using a 2-prong AC adapter, reverse the AC plug
- if that doesn't help, try using a 3-prong (i.e., grounded) AC adapter
- if you're plugging the T23 into the same AC circuit as the GC, try an outlet on a different circuit OR if you're already on a different circuit, try using the same one as the GC
- if you have a copy of PC Doctor for DOS for the T2x series and can construct a serial loopback plug, then you can see if that diagnostic shows any problems
You may also want to see if there's any voltage potential between the chassis of the GC and the laptop's ground. Put an AC voltage meter between the two. Ground on the laptop can be any of the screw terminals of the serial or parallel ports.
Ray Kawakami
X22;X24;X31;X41;X41T;X60;X60s;X61s;X300;X301;Z60m;Z61t;Z61p;560Z;600E;600X;T21;T22;T23;T41;R50;A21p;A22p;A31 and A31p
Not a Lenovo employee; just a volunteer helping out here
All personal links to PC-Doctor software removed 8/2012 by mfg request

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How do I use serial port read and show text, but not have it scroll off screen?

I am new-ish/returning amateur user of Labview and I am trying to edit the example VI "Advanced serial write and read VI" that is part of dev suite 2012. I need to use the string box to show ALL text received from serial port, always appending and only rolls off screen when more real data arrives at serial port.
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Solved!
Go to Solution.

OK- lets start back at the beginning. I have a few questions...
WHy does incoming txt get placed at top of txt box and then scroll up?  why would it make more sense to input at the bottom and scroll toward the top. I have created this huge txt box that appears to be impossible to use.
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Attachments:
Capture_VI.JPG ‏117 KB
Capture_VI2.JPG ‏133 KB

How can i browse FP 2000 via serial port same use Ethernet port(RJ 45)?

I am a new user for labview.I develope my program with FP 2000 but I have some problem
1 How can i browse FP 2000 via serial port same use Ethernet port(RJ 45)? if it can Tell me please.
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Someone please help me.Thank you very much.

Hi!
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File transfer of larger size through serial port

Hi
I need to transfer files of larger size may be around 20Kb through serial port. Can some one suggest some idea or can provide any sample VI for achieving this. i guess we cannot send the complete file at a stretch, so we may need to form some packets and then send. If i am right i need some help for achieving this.
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You may want to use something like the XMODEM protocol.
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Now is the right time to use %^<%Y-%m-%dT%H:%M:%S%3uZ>T
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[SOLVED] usb serial port emulation

Hello
I'm an Arch newbie. I just purchased an HP Neoware CA21 thin client, replaced the small DOM unit by a 1GB module, and installed Arch on it. I would like to use this device as a kind of data logger, 24x7 continuous operation.
The device I'm reading is an ADC connected via a USB port, which provides a CDC/ACM interface. When I plug it into the CA21 USB port, /dev/ttyACM0 does appear. Under Ubuntu on a normal PC the same happens but I find I can only use it via the usbserial driver, which provides serial port emulation for a USB device, creating /dev/ttyUSB0. That's because I can't get the java serial port interface rxtx to recognise a ttyACMn device, for reasons I don't understand and am still investigating.
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3/ I'm kind of assuming rxtx works under Arch - is that right?
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Last edited by mistertransistor (2011-11-12 16:43:03)

Well, kind of solved. I found that
- adding the "options usbserial ..." line does not prevent ttyACM0 from appearing when the device is plugged in
- once ttyACM0 is there, no amount of "modprobe usbserial ..." will make ttyUSB0 appear
- however, if you "rmmod cdc-acm" and then "modprobe usbserial ..." you will get a ttyUSB0
Having figured that out, I got a test app reading the USB port with no problems. However my real app gave some odd 'Main class not found ...' error even though the exact same jarfile runs fine under Windows XP (you may be wondering why I develop there rather than under Ubuntu. Well, I have a dual-boot machine XP/Ubuntu and NetBeans runs *much* better under XP - quite puzzling). Eventually I solved this by creating a new NetBeans project/application and copying in the code from the existing one - a total mystery to me).
So now the device is in my garage collecting data from my seismograph. I'm writing to a USB stick, not sure about how long that will last but as I don't delete files much it's always writing in a new area and any given area gets very few write cycles.
This is marked SOLVED but I still have not found how to read ttyACM0 and I would like to do that.
Andrew

Second serial port for CompactRIO

I would like to reiterate the question posted here.
Is it possible to add a second serial port to a CompactRIO chassis?
Using the FPGA seems like it would not actually be transmitting at RS-232 levels, and using an Ethernet-to-Serial Port converter sounds more promising, but that means having the drivers loaded properly. Are these the only options, and are they even feasible? Having a multi serial port module seems like it would be a nice addition to the CompactRIO suite.

Hi m3nth,
The link involving using the FPGA and digital modules has been successful in the past with many people and like the tutorial says, a big part with this is converting to voltage using a voltage translator. With respect to the ENET option, the link below can be used to direct you to the products that we have that you may want to try to implement multiple serial ports. I've done some research and it appears that there shouldn't be an issue using the converters with a real-time system. When using the ENET converters, keep in mind that it may cause some more latency in your network as opposed to regular serial transmission. If you have any more questions, please let me know. Thanks!
http://sine.ni.com/nips/cds/view/p/lang/en/nid/10043
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praxis22 wrote:
from there I was able to hit alt-break and it gave me the options of S for service menu or space for baud rate
I his S (capital S) and it asked me for a password, but since I wanted to reset the Array password that wasn't immediately useful. but I figure I can google or ask Sun for that. We are a little further on at
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Hope this clears things.

PXI-8176 usb serial port multiplexer driver installation

How do I install the USB drivers for a USB/serial port multiplexer on a PXI-8176 with LV Real Time OS?? The PXI-8176 has two USB ports.
Thanks
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Buzz,
Thanks for making your post here in the Discussion Forums.
Your USB question is an interesting one. While you may be used to using USB hardware with your computer, USB hardware is not generally used in the LabVIEW RT operating environment. As this pair of short KnowledgeBases notes, USB hardware is not supported under LabVIEW RT and having USB enabled in RT tends to introduce jitter to your RT application:
Does LabVIEW Real-Time Support USB Communication?
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Serial port snooper

I frequently have to do Serial or VISA comms with devices.
I would like to know if anyone has any ideas for creating a VI that runs seperate to an existing VISA session which would "snoop" the (serial/GPIB) VISA port and read traffic going to and from the PC Port, without affecting the operation of the port.
1) Is this possible to do this in LabVIEW - if the Comms to the device is also running in LabVIEW?
2) Is it possible without extra hardware?
3) Am I just being a wishful thinker? (it's the Mech Eng talking here)
(I don't want to have to use any other propreitory S\W, I just want to see the history of the port commands, see the real time commands and possibly log them to a file)
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I don't see why it could not be implemented in LabVIEW.
If you have access to the original code that communicates over the serial port and you want to "snoop" into.. Then create an ActionEngine. Call one copy WRITE-COM.vi and the other READ-COM.vi. Drop it everywhere in the original code where you write to the port and the other everywhere you read and you can log everything that is "attempted" to write and everything that is read in seperate string buffers. The ActionEngine would of course have two inputs, the state and the string. You can do whatever you like within the AE, such as display to string indicator or write to file (or both).
Now the only limitation is that you cannot see what is going over the physical serial cable. That would be the same limitation from using any software solution.

A31 Serial port only works on dock..?

Hi All,
I have an IBM A31(2652-P3M) and I'm trying to use it as a GPS terminal for 4x4 driving. Most new laptops don't have a serial port to hook into my gps so this one is good in that respect.
But... the serial port on the laptop doesn't work. Only the serial port on the dock (Type 74P6733) works. Unfortunate the laptop with the dock is too big to mount in the car.
Is there any reason why the port on the back of the laptop itself doesn't work? Is there some software, hardware or bios switch that controls which serial port works?
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Hi freaky-namuh, welcome to the forum
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Andy ______________________________________
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Add serial ports on cFP

I have a cFP-2110 already installed. If i need an additional serial port on it, what could i do (other than buying a whole new cFP)? For example for cRIO there's the NI 9870 module, but for cFP...

Hi,
you could use a NI ENET-232 or ENET-485 serial device in order to add serial ports to your cFP, as explained in the following tutorials:
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When I am running Labview RT environment using dual core
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Hi Magnetica
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Have you had RT applications running on this
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Is the development computer a 64bit machine?
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From my VXIpnp directory i deleted all but these files:
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When shipping this to WinXP (and copying "VXIpnp" to the root directory), the serial port was not found, so i renamed the direction "Win95" to "
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Hey Joachim,
In order to create an installer that includes the VISA Run-time engine for serial IO you will have to purchase LabVIEW 7.x. See screen shot. This packages a small compact version of the run-time that can only be used for serial, but it takes up much less space. The installer that I created has my application, the LV Run-time, and the VISA run-time and it is about 26 MB.
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Attachments:
advanced.JPG ‏31 KB

Using a PS/2 keyboard on a Sparc workstation through the serial port

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We need a way of connecting the PS/2 keyboards to the serial ports of the Sparc workstation. We already have a piece of software that will read ascii values from the serial port so we definately want to go through the serial ports.
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Actually, that's not a bit perverse, at all.
Jonathan's suggestion is a standard method of connecting to a server.
(null cable between the computer serial ports)
... see the Solaris man pages.
man tip
TeraTerm and Hyperterminal are customarily used on a PC running some dialect of Windows.
The 'tip' command is all that's necessary between Solaris systems.
PS/2 is not a serial connection, but is a keyboard/mouse interface 'invented' by IBM when they offered their XT-class PS/2 line of desktop systems, back in the 1980's.
I found this next link by using Google:
http://members.chello.at/theodor.lauppert/computer/ps2/
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Since you cannot change the dedicated console hardware,
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T23- A real challenge- Serial Port

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