v_pan

i'm a little bit confuse about this..

can you show me what steps must i do to

watch a simple vi from another PC ,via internet?

web publishing tool gives me an address like

http://mypc/simple.vi

but this address is a local .

maybe i must change "mypc" to current ip address like 82.210.125.150??

thank you very much!

i will check the file , but fisrt i have to install 8.6v because

my labview is an older version.

hello , is it possible to watch a VI from internet?

i made a simple VI and i want to watch it from everywhere.

i have done some tries without result.

can you help me?

yes,i have made a test before,run in Labview or Hyper.

suddenly,i have no contact with software!!!

anyway, i will search for something else ...

problems never ends!!

well, i download a program-spy-watch-serial data.

i have done a communication multi and software and i wanted to saw

what data sends-recieves.

now, software doesn't let me communicate with multi!!!

says , (check COM1 or the unit)

i don't send any command. actually , when i press some "letter" my PC stucks.<br>that i'm a doing is to connect them and wait receive data.<br>normally, multimeter sends all time data over 232.

thus, if i connect multi with PC i will can see data.

either hyperterminal or VI can not see anything.

multi and software dont have problems.

i didn't make any specific code on LABVIEW.

i open the example basic serial read and write.vi

and just try to communicate

i also try on hyperterminal without result.

model of multimeter (UNI-T UT70D)

i did as operating manual said:

Baud rate 9600

start bit 1 (always 0)

stop bit 1 (always 1)

data bits 8

parity none

................................

is there anything else to check?

hello ...

i have bought a multimeter and i tried to upload values to Labview

this multimeter has own software to read and represent values

But i did an effort to build my own software to take and show values.

actually , i made the simpliest communicate on RS232 without result.

do you think that data have a codification or something?

is there anyone who did that before?

if you want i can upload manual of multimeter.

i'm very happy to see you again!!!!

thanks for answer Dan!!

i send from my microcontroller 10 periods = 250 values.

when labview takes the last value,then appears the result and wait for another

250 values .my problem is that i don't want to run continusly

i want to take 250 values ,calculate ,and then wait to take other 250 values.

if i can reset tables every 250 values ???

one thought is to add to more cases ,as example "S" for beginning and "W" at the end

at the "S" i will do ENABLE table and at "W" i will do RESET table...

is it possible to do this automatically???

i hope to understand...

3000000 is "byte to read " is very high because data are too many!

when i put it at smaller value i have bad signals!!

Hi everyone,

I am trying to finish my project with pic and labview through serial port and i have been stucked in something and i want your help.

I use cases to saperate three chanels that i am taking from the pic and send them from the serial port to labview. My problem is that i want the program to start making calculations when i send it one letter for example "S" (as start), S CaseA CaseB CaseC CaseA CaseB CaseC (pause_labview wait for the next start) S CaseA CaseB CaseC CaseA CaseB CaseC......somethink like this.

Furtheremore as you can see i have to calculate the rms value of the three chanels. As you can see the value of rms is always changing but i want to see this value every 250 new values of my signal.

hello ....

i send from microcontroller via rs232 2 signals (take them from sensors)

Volt and Current ..i can plot them and store them..

so far so good..no problem!

i can also estimate reactive power S=P + iQ

the problem is how i estimate average POWER (real)

one idea is to multiply V*I (any sample) then pass to Low Pass Filter at 5Hz

and that i receive is real power (sounds simple!)

i test it on simulate signals and works great

but

labview don't recognize my two "signals" as signals!

what can i do for this?

do you have any idea?

i will use a PIC microcontrolle that supports USB2.0 hardware.i will make software of USB protocal .

so, output from PIC will be a usb cable (not rs232 to usb converter) and i 'll plug it to one of my usb2.0 port

on my computer

in that case, will LABVIEW recognise this PORT as serial(COM4 for example) or usb?

can i increase speed that way?

thanks for answer!!

hello everybody..

i made a project based on microcontroller and communicate with 232.

my baud rate is at 115200bps and proved to be very poor for what i want to do.

i'm thinking to change my communication to usb2.0 (microcontroller support )

my question is ..

if i do this ,do i have to change my program on labview?

i mean ..

now i select COM1 to communicate with micro

after change this

the only thing i have to do is to change COM1 to COM4 for example?

and increase baud rate

or i have to do more things on program>?

thanks a lot DanDefriese,again!

i upload an example just to see how represent the data.

this time i put 6 different graphs and i can see all plotting.

I have made many changes

and finally I managed to finish it and it works fine.

However, the minimum delay that it works correctly is at 5ms.

If I need to reduce it what I have to do;(e.g 10,100us).

i'm not so sure if i have done the right changes

i think that i have done wrong connections

when it's runs the case loop (that represent A,B,C plots) is always "0"

and i don;t see nothing plotting!

but i noticed "read buffer" takes the right values .

printf function from pic

printf ("A%d\n",lut);

printf ("B%d\n",lut1);

printf ("C%d\n",lut2);

what have i done wrong?

thanks Dan DeFriese for your significantly help!!

i made some changes in VI and now seems to work!

represent and negative numbers!

(for some reason cannot upload .bmp to see it)

this is for one signal

I want to use cases so as to saperate 2-3 signals.

For example, when I sent from the serial "A30"

the programe will recognise that the number 30

have to store to the first file.

When I sent "B45" the programme will store the

number 45 to the second file etc.

I have done a similar programe to recognise numbers,

not srings.

Can I do that?

any idea?

i was sending over hyperterminal that you was wrote and worked fine

i did not putted delays and program did not confused

i didn't maked "scan from string "work.

i noticed that when i had labview and C code delay 10ms works fine.(and #byte read at 20)

now another problem that generate is how represent negative numbers!

i sent int lut[6]= {10 20 30 -20 -10 }

for(i=1,i<=5 i++){

printf("%d \n",lut)}

..........................

10 20 and 30 plotted

-20 -30 not!!

can i fixed it on labview or can i try to fixed it on C code?

what is your opinion?

Thank you very much for your help.

This programme works fine by now. You may notice that I made a modification to your

programme. Instead of showing a character i made it to show a number.

One problem that now appears is that when I am going to send some bytes every little time

lets say every 1ms the programme confuses and it shows wrong values.

Can you think something to solve this problem????

What I want to do is a 12-bit ADC convert from my microcontroller and represent this bits

as a number to a figure. Is that programme good or I have to make another one ?

thank you for your answer Dan DeFriese

i do a simple example to verify that the character

i send from microcontroller will

present at read buffer

my c code is

while(!input(button)){

delay_ms(100);

printf("a\n"); }

everytime i press the button i want to see in "read buffer"

character 'a'

but i see differents character's everytime i press the button

the right thing will be to see all time 'a'

where do you think the wrong is?

and something else

when i increase the "bytes to read" (2,3,4....)visa error appears "blinking"

when i have it constantly at 1 byte it's ok but visa error appears continually and does not appear the "a"

as you can see at example

(ps. over hyperterminal works fine)

i hope you to understand what i mean...

thank you...

hello ...

i'm trying to communicate from my microcontroller

to send a simple printf() ,but i have problem's

1. i have an error (-1073807298 ) but i don't understand what it is .I searched at the Visa error codes

and the error says "Could not perform operation because of I/O error".

i'm still confuse about this

2. even with error label read buffer takes some data but it isn't the data which i send from microcontroller

for example i send printf("abcd\n");

and the read buffer has different value!!

(i tried the same C code to hyperterminal and everything was fine)

what's going wrong?

thank you...

thank's a lot ..

i will have a look..

hello everybody...

i'm a new user of Labview,and i have to say that i found it very interesting.

i want to ask you some questions before i start a project,if anyone can help me.

i will communicate with a microcontroller (Pic)

the kind of connection will be via ethernet port.

i did not found any example to show me the way to do this.

is it possible,this kind of communication?

thank you ..