AnsweredAssumed Answered

vrf No read terminator symbol RS232 communication

Question asked by VRFuser on Jun 5, 2003

Like • Show 0 Likes0
Comment • 5

Hello Hugo,

Your welcome. I owe a lot things from great regular VRF contributors (Shaw Fessenden, G.Nied,Bill Osmann,M.Watts, all vrf good guys). If you have solutions to VRF posted problems in the future, feel free to help too!

To answer your question:

You can get the interface event from:

I/O -->ADVANCE I/O-->INTERFACE EVENT

Regards. 

Ronald G. Padua
+++++++++++++++++++++++++++++++++
Failure Analysis Engineer
CBE Customer Returns Analysis Group
Continental Temic Philippines
Bagsakan Road, FTI Estate
1630 Taguig,Metro Manila, Philippines
+++++++++++++++++++++++++++++++++
Fax/Phone: (++632)8384195
E-mail: ronald.padua@temic.com

<table width=100%><tr valign=top><td><td>"Hugo Renkema" |TKIP@gastec.nl>06/05/2003 08:28 PM
<td> 
 To: |Ronald.Padua@temic.com>
 cc: 
 Subject: RE: [vrf] Re: No read terminator symbol RS232 communication</table>

Hello Ronald,
 
The example you send to me worked fine!! Big thank-you for that.
 
Only one question left, where did you this "Interface Event"?? I searched through the functions list, but not Interface Event there.
 
Regards,
 
Hugo Renkema
 
-----Oorspronkelijk bericht-----
Van: Ronald.Padua@temic.com [mailto:Ronald.Padua@temic.com] 
Verzonden: donderdag 5 juni 2003 14:08 
Aan: VEE vrf
Onderwerp: [vrf] Re: No read terminator symbol RS232 communication
Urgentie: Hoog
 

Hello Hugo,

Try running the attach sample inside your VEE program. You can seek more info about the involve objects on VEE help facility.


Regards.

Ronald G. Padua
+++++++++++++++++++++++++++++++++
Failure Analysis Engineer
CBE Customer Returns Analysis Group
Continental Temic Philippines
Bagsakan Road, FTI Estate
1630 Taguig,Metro Manila, Philippines
+++++++++++++++++++++++++++++++++
Fax/Phone: (++632)8384195
E-mail: ronald.padua@temic.com

---You are currently subscribed to vrf as: rsb@soco.agilent.comTo subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".

No one else has this question

Outcomes

5 Replies

ramarquardt Jun 4, 2003 4:29 PM
Mark Correct
Correct Answer

Hello Hugo,
If the protocol has, as you say, the number of bytes in the header
(viz A packet size indicator),
then assuming the header is always a fixed number of bytes,
you first do a binary read of the standard number of bytes
for the header then parse that and compute how many more
bytes to read, then do a binary read for that number of bytes
and Voila'....

We have a bit more complex protocol to deal with here, DF1.
Which has no packet size indicator, the packet starts with
an escape sequence and ends with an escape sequence,
so we have to read it one byte at a time and have to analyze
each byte as it comes in (a real royal pain - but the PC's
are pretty fast today so it is not very noticeable).

Regards
....Rob

"Hugo Renkema" <TKIP@gastec.nl> on 06/05/2003 06:33:38 AM

Please respond to "Hugo Renkema" <TKIP@gastec.nl>

To: "VEE vrf" <vrf@it.lists.it.agilent.com>
cc:

Subject: [vrf] No read terminator symbol RS232 communication

Hello everyone,

This is my first post in the vrf Mailing List. I hope my problem is
explained well, if not; feel free to ask for more information.

I am using HP-VEE 6.01 to communicate with a device via RS232. The protocol
by which the communication takes place has no EOL-symbol. The message-body
does contain a NoB (Number of Bytes) which indicates the length of the
message.

When sending commands from PC to this device, this is not a problem in
HP-VEE. The problem occurs when the device sends back a response. This
response also has no EOL-symbol. Therefore HP-VEE doesn't know when the
total message is received.

This results in the fact that the response is shown in the BUS I/O MONITOR,
but not available with a read-command in a DIRECT IO component.

This is due to the fact that the read terminator, which must be filled in,
is different for every single response.

The question is simple (and hopefully the answer too). How to read a
string, obtained from a COM-port, using HP-VEE when the last byte of the
message is unknown.

Thanks in advance,

Hugo Renkema

Email: tkip@gastec.nl

---
You are currently subscribed to vrf as: ramarquardt@ra.rockwell.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email
"vrf@it.lists.it.agilent.com".
If you need help with the mailing list send a message to
"owner-vrf@it.lists.it.agilent.com".

---
You are currently subscribed to vrf as: rsb@soco.agilent.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".
If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".
Like • Show 0 Likes0
Actions
g.nied Jun 4, 2003 8:50 PM
Mark Correct
Correct Answer
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><META http-equiv=Content-Type content="text/html; charset=us-ascii"><META content="MSHTML 6.00.2800.1141" name=GENERATOR><STYLE></STYLE></HEAD><BODY lang=NL vLink=purple link=blue><DIV style="FONT: 10pt Courier New">Hello Hugo, </DIV><DIV style="FONT: 10pt Courier New"> </DIV><DIV style="FONT: 10pt Courier New">nice to meet you here as a new listmember.</DIV><DIV style="FONT: 10pt Courier New"> </DIV><DIV style="FONT: 10pt Courier New">If your vee program does not know with howmany bytes your device responds how do you know by yourself when it isfinished sending data?</DIV><DIV style="FONT: 10pt Courier New"> </DIV><DIV style="FONT: 10pt Courier New">Perhaps it would be helpful to read one byteafter another and reassemble them in vee.</DIV><DIV style="FONT: 10pt Courier New"> </DIV><DIV style="FONT: 10pt Courier New"><DIV><DIV>best regards,</DIV><DIV> </DIV><DIV>G. Nied</DIV><DIV> </DIV><DIV>-------------------------------------------------------------------------</DIV><DIV>Georg Nied - Software-Development - Hansestr.7 -51149 Cologne - Germany</DIV><DIV>Tel: +49 2203 9770915 - Fax: +49 2203 9770924 - eMail:<Ahref="mailto:info@gn-software.de">info@gn-software.de</A></DIV><DIV>-------------------------------------------------------------------------</DIV></DIV><DIV> </DIV></DIV><DIV style="FONT: 10pt Courier New"> </DIV><BLOCKQUOTEstyle="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <TABLE style="BORDER-LEFT-WIDTH: 0px; BORDER-LEFT-COLOR: #efefef; FONT: 10pt Arial; COLOR: black; BORDER-TOP-COLOR: #efefef; BORDER-BOTTOM: #efefef 0px; BORDER-RIGHT-WIDTH: 0px; BORDER-RIGHT-COLOR: #efefef" cellSpacing=0 cols=2 cellPadding=0 width="99%" bgColor=#dfdfdf border=0> <TBODY> <TR borderColor=#dfdfdf borderColorLight=#dfdfdf bgColor=#dfdfdf> <TD style="PADDING-LEFT: 4px; PADDING-BOTTOM: 3px; PADDING-TOP: 3px" width=120> <DIV style="FONT: bold 9pt Arial">Original Message </DIV></TD> <TD align=right> <DIV style="FONT: 8pt Arial"> processed by Tobit InfoCenter </DIV></TD></TR> <TR style="PADDING-BOTTOM: 2px" bgColor=#efefef> <TD style="PADDING-LEFT: 4px" width=80 bgColor=#efefef> <DIV style="FONT: bold 9pt Arial">Subject: </DIV></TD> <TD bgColor=#efefef>[vrf] No read terminator symbol RS232 communication (05-Jun-2003 13:33)</TD></TR> <TR style="PADDING-BOTTOM: 2px" bgColor=#efefef> <TD style="PADDING-LEFT: 4px" width=80 bgColor=#efefef> <DIV style="FONT: bold 9pt Arial">From: </DIV></TD> <TD bgColor=#efefef><A href="mailto:TKIP@gastec.nl">TKIP@gastec.nl</A></TD></TR> <TR style="PADDING-BOTTOM: 4px" bgColor=#efefef> <TD style="PADDING-LEFT: 4px" width=80 bgColor=#efefef> <DIV style="FONT: bold 9pt Arial">To: </DIV></TD> <TD><A href="mailto:vrf@it.lists.it.agilent.com">vrf@it.lists.it.agilent.com</A></TD></TR></TBODY></TABLE> <DIV> </DIV> <DIV class=Section1> Hello everyone, This is my first post in the vrf Mailing List. I hope my problem is explained well, if not; feel free to ask for more information. I am using HP-VEE 6.01 to communicate with a device via RS232. The protocol by which the communication takes place has no EOL-symbol. The message-body does contain a NoB (Number of Bytes) which indicates the length of the message. When sending commands from PC to this device, this is not a problem in HP-VEE. The problem occurs when the device sends back a response. This response also has no EOL-symbol. Therefore HP-VEE doesn’t know when the total message is received. This results in the fact that the response is shown in the BUS I/O MONITOR, but not available with a read-command in a DIRECT IO component. This is due to the fact that the read terminator, which must be filled in, is different for every single response. The question is simple (and hopefully the answer too). How to read a string, obtained from a COM-port, using HP-VEE when the last byte of the message is unknown. Thanks in advance, Hugo Renkema Email: tkip@gastec.nl </DIV>--- You are currently subscribed to vrf as: g.nied@gn-software.de To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@it.lists.it.agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BLOCKQUOTE>--- You are currently subscribed to vrf as: rsb@soco.agilent.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@it.lists.it.agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></HTML>
Like • Show 0 Likes0
Actions
VRFuser Jun 4, 2003 10:33 PM
Mark Correct
Correct Answer
<html><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 10 (filtered)"><style></style></head><body lang=NL link=blue vlink=purple><div class=Section1>Hello everyone, This is my first post in the vrf Mailing List. I hope myproblem is explained well, if not; feel free to ask for more information. I am using HP-VEE 6.01 to communicate with a devicevia RS232. The protocol by which the communication takes place has no EOL-symbol.The message-body does contain a NoB (Number of Bytes) which indicates thelength of the message. When sending commands from PC to this device, this isnot a problem in HP-VEE. The problem occurs when the device sends back aresponse. This response also has no EOL-symbol. Therefore HP-VEE doesn’tknow when the total message is received. This results in the fact that the response is shown inthe BUS I/O MONITOR, but not available with a read-command in a DIRECT IOcomponent. This is due to the fact that the read terminator,which must be filled in, is different for every single response. The question is simple (and hopefully the answer too).How to read a string, obtained from a COM-port, using HP-VEE when the last byteof the message is unknown. Thanks in advance, Hugo RenkemaEmail: tkip@gastec.nl </div>--- You are currently subscribed to vrf as: rsb@soco.agilent.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@it.lists.it.agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></html>
Like • Show 0 Likes0
Actions
VRFuser Jun 5, 2003 12:04 AM
Mark Correct
Correct Answer
Hello Thomas,
An example of how doing that is provided in the Vee directory
examples->ActiveXAutomation. (Labview50.vee)
Regards

Thomas.Mitchell@Autoliv.com a e'crit:

>I think this might of been asked before, but can a LabView VI or program be
>called by VEE?
>
>Thanks
>
>Tom Mitchell
>Autoliv AEA
>
>
>
>---
>You are currently subscribed to vrf as: Laurent.Perdereau@cnrs-orleans.fr
>To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
>To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
>To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".
>If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".
>
>
>
>

--
---------------------------------------------------
Laurent Perdereau
Institut des Sciences de la Terre d'Orleans (ISTO)
---------------------------------------------------
Like • Show 0 Likes0
Actions
VRFuser Jun 5, 2003 5:08 AM
Mark Correct
Correct Answer
Does anyone have an example of reading the Power from an Agilent 53147A
Frequency Counter? Everything except for getting the power measurement
seems ok. I have managed electronically to get control over all of the
setups (i.e. continuous read, making Power the active function, entering
the power head information, etc.). I can see the correct measurement on
the instruments display, but nothing seems capable of forcing it to send
that data back to VEE (VEE Pro 6.01). Thanks in advance for any advice.

Sincerely,
Rick Miracle @ Raytheon

---
You are currently subscribed to vrf as: rsb@soco.agilent.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".
If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".
Like • Show 0 Likes0
Actions

vrf No read terminator symbol RS232 communication

Outcomes

Related Content

Recommended Content