How can I write to a Siemens S7-300 PLC tag from OPC Server.vbai page by using a Knob object ?
I am using NI OPC Server and I can read Siemens S7-300 PLC tags such as thermocouple values from the PLC. Additonally I can write manually a constant value to that tag by selecting it in the NI Distributed System Manager. And I can read the written value from NI Distributed System Manager or from NI OPC Server. But I can not write any value to the S7300 PLC tags such as by using a knob object at the NI Vision Builder AI Inpection (.vbai) page.
Any help is welcomed. Thanks in advance.
Attachments:
manual_writing_to_plc.png 298 KB
The tutorial at the following location explains how to use Vision Builder AI as a OPC server.
https://decibel.ni.com/content/docs/DOC-18647
http://www.ni.com/white-paper/13574/en
To allow VBAI to connect to an OPC Server (i.e. act as an OPC client), you need to purchase and install the DSC Run-time System.
Once installed, you can create an OPC I/O client using the Distributed System Manager, create variables bound to OPC tags, then create VBAI network variables that are bound to these variables.
Another possible technical solution to connect to OPC Servers supporting Data Access 2.0 is to use the datasocket API in a Run LabVIEW step.
http://forums.ni.com/t5/Machine-Vision/Read-and-Write-with-OPC-through-NI-Vision/m-p/2048278/highlig...
Hope this helps.
-Christophe
Similar Messages
-
Connecting a Siemens S7-300 PLC to NI OPC Server
As a part of the final year Bachelor Thesis project I and two others are involved with, I have been tasked with setting up an HMI/SCADA system to control level and flow in several water storage tanks. This is to be done locally via a "Operator Panel" and also remotely over the Internet via webbrowser. These storage tanks and control system is placed on a wheeled demonstration model so it can be used in classrooms and auditoriums. As such, I have a Siemens S7-300 PLC and the latest edition of LabVIEW (2009 Professional Ed.) available to me. In order to create a HMI system, we will also acquire the NI DSC module as it should have everything we need (NI OCP is included?).
Since this is a bachelor project and the school is basically paying for everything, we are on a rather strict budget. This means that we currently haven't settled on a solution for the "Operator Panel" since this would be dependent on how the PLC and panel interfaces. What we would like to do for simplicity sake is to use commercial laptop computer with touchscreen capability thus having a low cost "all-in-one" solution, both for local input & control and web publishing capability. Now, most computers today doesn't have serial comports anymore, but rather USB ports.
On the OPC server webpage under the OPC Device Connectivity heading, it is specifically stated "Siemens HMI Adapter for S7-300/400 via Serial with HMI adapter". I assume this refers to the following Siemens product: https://support.automation.siemens.com/WW/llisapi.dll/csfetch/8774263/hmi_adapter_x.pdf?func=cslib.c... (6ES7 972-0CA1X-0XA0).
Does this mean that the OCP server can only use a Serial connection via the HMI adapter for the S7-300 directly? Would it be possible to use a driverless Serial to USB adapter with the HMI adapter, or for example the Siemens CP5711 MPI to USB adapter? If it is not possible to use a USB based solution, We would have to use an older desktop PC with an serial comport or an additional PCI card and that is something we would like to avoid.
Any help on this matter would be highly appreciated.
-- DanJack, NUC Norway
Solved!
Go to Solution.now this is a problem the PLC S7300 does not support some functions of communication when you want to make a simulation may not be accessible from OPC Server, this by PROFIBUS Siemens USB / MPI + PLC S7300/400 protocol adapter cord
Atom
Certified LabVIEW Associate Developer -
Connection of Siemens S7-300 PLC to NI OPC Server 2012
Hi,
My name is Gevorg.
I am going to create a communication between S7-300 (CP 343-1 Lean) and NI OPC Server 2012.
As per my investigations, NI OPC server does not have appropriate drivers for S7-300 PLCs. At the other hand I could find any documentation, that prooves that S7-300 supports OPC protocol.
Does anyone have any experience of using S7-300 PLCs?
What protocol does it support?
Could you please help me..
Attached you can find the datasheet of S7-300 PLC.
Thank you in advance,
Attachments:
OPC server.png 64 KB
GH_CP343-1-Lean-CX10_76.pdf 1563 KBhttps://decibel.ni.com/content/docs/DOC-38858
Atom
Certified LabVIEW Associate Developer -
How can i write a code to get sume of value from days.
Hi,
how can i write a code to get the sum of value of days(example 1 to 30).
This is in BPS ...
i created multi planning area and creted planning function with {keyfigure name,planning area,days}.
now i want to read all the actual values from basic planing area(basic cube) and calculate the sum of the value.if you have idea can you share the code.
ENTRIES = VARC ( 'zvardays' ). ex(zvardays like 28 days or 29 days or 30 days or 31 days)
COUNT = ENTRIES.
*Get the all the days value from actual
FOREACH PAREA = 'basic planning area'.
COUNT = 1.
DO
SUM = SUM + {amount, count} (amount is a keyfirgure value)
ENDDO.
COUNT = COUNT+1.
SUMACT = SUM.
ENDFOR.
can you correct the above code ....to read the values and sum of the those value.
Thanks...Hi ..
That is ok..
Can you provide sample code for my requirement..
and also how can i pass the error message (can you help me syntax )
and if my acutal-total is not equal to plan-total then
i have to pass the error message and then i have to restrict save the data how i can i restrict(user can not save the data until the values should be equal) .
Can you help me it is very urgent..
thanks.//
Edited by: Eyda rose on Jun 4, 2008 9:29 PM -
How can I get Safari 5.1.2 to automatically open pdf files on web pages by using Adobe Reader?
Safari 5.1.2 always opens pdf files on web pages as a single frame and thus it will not print properly. How can I get Safari to open all pdfs with Adobe Reader 10.1.1?
Carolyn,
Thanks for sending your suggestion on how to solve my problem. Unfortunately, it did not work for me. I trashed the file, quit and relaunched Safari, but the problem remained the same. Although it did not work, I do appreciate that you took the time to try to help me.
Thanks. -
How can I transfer my contacts to my new iPhone 5s from my olds iPhone 5s
How can I transfer my contacts to my new iPhone 5s from my olds iPhone 5s?
Use your backup from your old iPhone to restore your new one (assuming you have done iCloud backups or in iTunes). Also try looking at this https://support.apple.com/en-us/HT201269
-
How can I write a program that compiles without warnings?
I tried the following with the 1.5 beta-compiler (build 28; I think):
class Y {
public static final class Pair<X,Y> {
private X fst;
private Y snd;
public Pair(X fst, Y snd) {this.fst=fst; this.snd=snd;}
public X getFirst() { return fst; }
public Y getSecond() { return snd; }
public String toString() { return "("+fst+","+snd+")"; }
public static void main(String... args) {
Pair[] pairArr = new Pair[10]; // supposed to be an array of Pair<Integer,Integer>
for (int i=0; i<pairArr.length; i++)
pairArr[i] = new Pair<Integer,Integer>(i,i);
for (int i=0; i<pairArr.length; i++) {
Pair<Integer,Integer> p = pairArr; // unchecked warning
System.out.println(p);
Integer first = p.getFirst();
Integer second = p.getSecond();
// ... more stuff ...
It turns out that I get an unchecked warning when I extract an element from the array of pairs. Okay, that's fine. How can I avoid the warning? I had expected that an explicit cast would help.
Pair<Integer,Integer> p = (Pair<Integer,Integer> )pairArr;
With a cast I'm telling the compiler: "I _know_ what I'm doing; please trust me." But the compiler still issues a warning.
How can I write a warning-free program in this case? The only thing I can think of, is not using the parameterized type Pair in its parameterized form. But it's not the idea of Java Generics that I refrain from using parameterized types. What am I missing?It turns out that I get an unchecked warning when I
extract an element from the array of pairs. Okay,
that's fine. How can I avoid the warning? I had
expected that an explicit cast would help.
Pair<Integer,Integer> p = (Pair<Integer,Integer>
)pairArr;
With a cast I'm telling the compiler: "I _know_ what
I'm doing; please trust me." But the compiler still
issues a warning. Yes, but at least you were able to change the warning from "unchecked assignment" to "unchecked cast" which is a little shorter ;-)
Seriously , since arrays of generic types are disallowed, there is probably no way to get rid of these warnings - which makes a strong point for eliminating "unchecked" warnings altogether (see the other thread "selectively suppressing compiler warnings")
Cheerio,
Gernot -
How can I Write a sine wave in an Access-file?
I measure a sine wave in LabView 6i. How can I write the datas automatically to an Acces-file, at the same time?
In my program, I managed it with Execute SQL.vi, I change a number in a SQL statement(String) -> after this I push start and then it writes the statement in the Access-file.
The problem is, it writes only one data per measurement in the file. How can I write all datas in the Access-file and measure the wave at the same time?
Thanks for help!
Attachments:
getwave.vi 49 KBOn the waveform palette, you will find a "to components" vi that you can break out the array of the waveform. You can then, using a for loop write all of the values from the waveform.
Better yet, there are examples in the database toolkit manual on pages 3-13 to 3-15 that deal with reading arrays (and even has a waveform example).
Good luck! -
How can i write the below code using "For all entries"
Hi
How can we write the below code using "for all entries" and need to avoid joins...
Please help
SELECT aaufnr aobjnr aauart atxjcd a~pspel
agstrp awerks carbpl cwerks
INTO TABLE t_caufv
FROM caufv AS a
INNER JOIN afih AS b
ON aaufnr = baufnr
INNER JOIN crhd AS c
ON bgewrk = cobjid
AND c~objty = 'D'
WHERE ( a~pspel = space
OR a~txjcd = space
OR NOT a~objnr IN
( select OBJNR from COBRB AS e
WHERE objnr = a~objnr ) )
AND a~werks IN s_plant
AND a~auart IN s_wtype
AND NOT a~objnr IN
( select OBJNR from JEST AS d
WHERE objnr = a~objnr
AND ( dstat = 'A0081'OR dstat = 'A0018' )
AND d~inact 'X' ).
Reward points for all helpfull answers
Thanks
Ammi.Hi,
SELECT objnr objid aufnr
from afih
into table t_afih.
SELECT objnr
from JEST
into table t_JEST
where stat = 'A0045'
OR stat = 'A0046'
AND inact 'X'.
SELECT objnr
from COBRB
into table t_cobrb.
SELECT arbpl werks objid objty
from crhd
INTO table it_crhd
FOR ALL ENTRIES IN it_afih
WHERE objty eq 'D'
AND gewrk = it_afih-objid.
SELECT aufnr objnr auart txjcd pspel gstrp werks aufnr
FROM caufv
INTO table t_caufv
FOR ALL ENTRIES IN it_afih
WHERE aufnr = it_afih-aufnr
And pspel = ' '
AND txjcd = ' '
ANd objnr ne it_crhd-objnr
AND auart in s_wtype
AND werks in s_plant.
AND objnr ne it_jest-objnr.
dont use NE in the select statements, it may effect performance also. Instead use if statements inside
loops.
loop at t_caufv.
read table it_chrd............
if t_caufv-objnr ne it_chrd-objnr.
read table it_jest..........
if if t_caufv-objnr ne it_jest-objnr.
(proceed further).
endif.
endif.
endloop.
hope this helps.
Reward if useful.
Regards,
Anu -
How can I write into a table cell (row, column are given) in a databae?
How can I write into a table cell (row, column are given) in a database using LabVIEW Database Toolkit? I am using Ms Access. Suppose I have three columns in a table, I write 1st row of 1st column, then 1st row of 3rd column. The problem I am having is after writing the 1st row 1st column, the reference goes to second row and if I write into 3rd column, it goes to 2nd row 3rd column. Any suggestion?
Solved!
Go to Solution.When you do a SQL INSERT command, you create a new row. If you want to change an existing row, you have to use the UPDATE command (i.e. UPDATE tablename SET column = value WHERE some_column=some_value). The some_column could be the unique ID of each row, a date/time, etc.
I have no idea what function to use in the toolkit to execute a SQL command since I don't use the toolkit. I also don't understand why you just don't do a single INSERT. It would be much faster. -
Hello!
I want to write 1 digital port from PXI-6536 with streaming to TDMS file.
I'm writing by 'DAQmx Configure Logging.vi' and become TDMS file with 8 boolean channels.
How can I write to 1integer channel?
Attachments:
1.JPG 27 KBHey Atrina,
The actual data stored on disk is just the raw data (that is, a byte per sample in your case). It's really just a matter of how that data is being represented in LabVIEW whenever you read back the TDMS file.
I'm not sure if there is a better way to do this, but here is a way to accomplish what you're wanting:
Read back the TDMS file as a digital waveform. Then there's a conversion function in LabVIEW called DWDT Digital to Binary. This function will convert that set of digital channels into the "port format" that you're wanting. I've attached an example of what I mean.
Note: When looking at this VI, there are a few things that the downgrade process did to the VI that I would not recommend for these TDMS files. It added a 1.0 constant on the TDMS Open function, and it set "disable buffering" on the TDMS Open function to false; you can get rid of both of those constants.
Message Edited by AndrewMc on 01-27-2010 11:21 AM
Thanks,
Andy McRorie
NI R&D
Attachments:
digitalconvert.vi 13 KB -
I am connecting an external USB HDD and I can see it on my Apple Macbook Air. BUT this drive is READ only. How can I write to it?
Drive Partition and Format
1.Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
Steps 4-6 are optional but should be used on a drive that has never been formatted before, if the format type is not Mac OS Extended, if the partition scheme has been changed, or if a different operating system (not OS X) has been installed on the drive. -
How can I write to an OPC Server?
Hello!
I was busy a few days with LabVIEW 8 to finish a special task, but now I've got problems to solve the following problem:
I have an OPC connection between a frequency converter and LabVIEW 8. With the example vi's I get the data out of the OPC Server (revolutions per minute).
So I can read data out of the OPC Server, but how can I write? I want to write several voltage values to the OPC Server that the frequency converter gets the required revolutions per minute.
Have you got any ideas? Are there existing example vi's to write data to an OPC Server?
Best regards and Thanks in advance!So here it is - a little bit modified, but you should get the idea out of it.
If you have questions, I'll try to answer them .
Thomas
Using LV8.0
Don't be afraid to rate a good answer...
Attachments:
IOControl.llb 168 KB -
How can I write to an SD card with my iPad 3?
How can I write to an SD card/thumb drive with my iPad 3?
Sorry to post this question before realizing others already did. HOWEVER! Why would Apple make such a cool device like the iPad without the abiity to write to an SD card?
-
How can i write to ntfs device
how can i write to ntfs device from mac
By default, OS X (and near all operating systems different than Windows) can't write in NTFS drives because of a Microsoft limitation.
To be able to write in NTFS drives, you have to use a third-party application. There are a lot, but the most recommended is Paragon NTFS, although it's a paid application. If you want a free app, try this > http://osxfuse.github.com
Maybe you are looking for
-
Photos open in Preview, won't import to iPhoto
iMac G5 MAC OS X 10.3.9 iPhoto 5.0.4 After coming home from college I noticed that the iPhoto on my family's home computer wasn't opening at all. After following the different instructions on the discussion boards with no success, I found the only th
-
I have Labview for HP-UX and a HPIB card. Is there a way to make them work?
I appreciate any pointers. Jose Chacon Florida
-
SQL server service accounts question
We created a test SQL environment using a Technet evaluation copy of Windows Server 2012 along with an evaluation copy of SQL2012. After testing, everything is working as planned so were going to enter the product keys for both Windows Server and SQL
-
whats the command in a layer 3 switch to shift from router to switch function and vice versa? In a VTP, if server is the default settings, is VTP working even though no client was configured?
-
Email signature and Mail Format
Blackberry blend is very unique and useful software. But I have a couple of problem to use this software... 1. Email signature Please tell me how to insert email signature. I would like to use email signature just as blackberry smartphone. 2. Email f