Interfacing PLC siemens S7_300 and LabVIEW DSC using siemens OPC server

Does anyone already interface Siemens PLC S7_315-2-DP with LabVIEW DSC using Siemens OPC server?
Is that a good solution? Are there any hidden problems?

The use of an OPC Server is the way to go when dealing with LV. If you already have Siemens OPC Server then use that. Otherwise, NI has a product called IA Severs/Lookout Protocol Drivers (LPD), which has a large selection of drivers for PLC's. After configuring the driver, LPD is the OPC Server for the device.

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Has somebody already used Applicom PCI2000ETH Card or Applicom SW1000ETH software to communicate with ETHERNET bewteen siemens s7-300 and LabVIEW DSC ?

I want to use ETHERNET and not PROFIBUS to communicate and I think you can do that with only the applicom software SW-1000ETH. You must just have an ethernet card on your PC. So, you could use a notebook with an
ethernet card. You can also use Applicom PCI2000ETH for better performance.

Hi,
You might be able to get the configuration listed above working as long as you can get from Siemens/Applicom or any other third party provider a OPC Server that communicates with the S7-300. Since LabVIEW DSC is a OPC client, you would be able to establish connection.
The National Instruments driver for the S7-300 (Containnned in the product called "IA OPC Server CD") does not support communication through ethernet directly, you would either have to have a Profibus board or use a serial port with a Siemens HMI Adapter.
I hope it helps
Best Regards
Andre Oliveira

Are there any example vi's for implementing a circular buffer between a plc, opc server, and labview dsc??

I am storing a block of data inside plc registers and reading this group into labview as a continuous set of datapoints. I am counting the number of scans in the plc and sometimes the number of points collected inside labview doesn't match.

To explain a a little bit about tag updating:
The LabVIEW DSC tag engine is not just updated on any change of the value within the plc. There are, in fact, several "deadbands" that must be crossed before those tags are updated:
1) The OPC Server has a deadband - where the plc register value has to change a certain % before it is recorded.
2) In the LabVIEW DSC moduel, there is an I/O Group Deadband that determines when the tag engine is actually updated.
Both of these deadbands must be satisfied before a new "value" is recorded in the LabVIEW DSC tag engine.
Therefore, I would check your OPC Server's deadband (configurable in the OPC Server configuration utility) and also the I/O Group deadband for those tags (configurable in the tag configuration
editor).
If this doesn't resolve the issue, please let me know. Thanks.

I have siemens plc s7-300 and labview how can i communiction between plc and s7-300

Hi all good morning
iam new user for labview
now iam working one new projects with labview and s7-300 automation plc so how can i communication between plc and s7-300 using profibus or ethernet cables can any one help me with example
thanks
best regards
vijaynagar.

Dear vijaynagar,
it would be posible to communicate with our Comsoft PROFIBUS products like DF PROFI II, FNL or cRIO PB.
Please have a look at:
- DF PROFII: PCI, PCIe, C-PCI or PC104+ card with LabVIEW drivers: Link
- FNL: Ethernet/PROFIBUS Gateway: Link
- cRIO PB, C-Series module for National Instruments FPGA chassis: Link
The DF PROFI II can be bought directly from Comsoft, the cRIO PB can be bought from National Instruments.
Regards,
Sven
P.S. If you have any questions feel free to contact: [email protected]

NI hardwares and LabVIEW toolkits used

hi,
i am supposed to do a project using LabVIEW.the project which i have planned to do is to set a bridge over the platforms in railway stations and controlling it by detecting the arrival of train.i know only basic LabVIEW.but to do this project,some NI hardwares and LabVIEW toolkits can also be used.since now i am not exposed to NI hardwares,i need help.it would be useful for me if anyone can tell me what all LabVIEW toolkits and hardwares can be used for this project?

Hello Sprice,
Browse the shipping examples according to “Directory Structure” and then select
DAQ to find the Traditional DAQ examples.
There a lot of examples that are written for counters (Counter >>
daq-stc.llb >> Count Edges (DAQ-STC).vi).
What kind of signals are your photons creating? Are they TTL compatible at a certain
frequency? You don’t care about overwriting
your buffer?
Respectfully,
Rob F
Test Engineer
Condition Measurements
National Instruments

Has anybody used DSC or the OPC server to access DNP 3.0 devices

I have a potential client that has some devices that communicate using DNP 3.0. I see that DNP is supported in OPC server 5.1. I have zero experience using DSC and OPC, but I want to send this client a small demo app so he can see LabVIEW working with his equipment.
If anybody has done this, could you please give me some pointers on where to start, or better yet, some example code.
This will be on WinXP, LabVIEW 7, OPC 5.1 and if needed, DSC 7.
Thanks
Ed
Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.

Thanks Robert,
We already have DSC 7, so if it�s easier and/or quicker, I�ll probably end up using that. I guess what I need to do run through the Introduction to DSC so I at least know the basics of it.
One question, do I need to have the customer�s equipment to configure the DNP connection so I can test communication with the Server Explorer? Or do I just need to know the format of the Tags to configure so he can test it.
Thanks Again
Ed
Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.

Installing Solaris 9 and Solaris 10 using one JumpStart server

Hi All,
Is there any possibility to install both Solaris 9 and Solaris 10 using only one JumpStart server?
Also it could be performed using flash archives?
Thanks in andvice,
Daniel

Actually I do not understand how it will work
together.
Maybe I will describe my point of view.
I have Solaris 10 with JumpStart server which is
configured and works fine.
So the next step to have Solaris 9 installation is:
* copy Solaris 9 OS boot and installation image to
the local disk using setup_install_server
Q: If this script fails what to do?setup_install_server should work fine unless you're installing on a ZFS filesystem. Part of the script is checking for sufficient disk space. I think the script may not work properly in all situations with ZFS.
* run add_install_client script from the Solaris 9
installation directory
Q: do I need to do any other changes?Nope. Assuming you're already running tftp for the Solaris 10 stuff, nothing has to be enabled.
So I have two OS on the JumpStart server that I can
choose to install.Yes.
JumpStart is configured to install Solaris 10. If I
would like to install Solaris 9 on the same machine
should I only run add_install_client script from the
Solaris 9 installation directory?If everything works right, that should remove the older entry from the bootparams database and the machine will jumpstart with Solaris 9.
Darren

Using IA OPC Server with A-B 1784-PCMK

The A-B 1784-PCMK uses 32-bit addressing (PCI). The IA OPC Server seems to only allow for 16-bit. Can I use the IA OPC server at 32-bit addressing?

Hello,
What version of the IA OPC server do you have? According to the following link the lookout and the OPC drivers are 32 bits. Now if you want to use this board for communicating to a PLC then when you select the PLC there is an AB parameter called interface where you can select the 1784-PCMK and that should take care of everything. Please check the Help for the AB in the IA OPC server.
I hope this helps. If I didn’t answer the question, please let me know.
Thank you
Ricardo S.
National Instruments

Siemens SPS5 and LabVIEW over OPC

Hello everyone,
for a new project i have to down and upload some data between a PC running
LabView and a Siemens SPS5 PLC controller.
Im new to this kind of application so it would be nice to hear in which way
i should try to do that.
A friend told me i should take a look at OPC (Ole for Production Controll).
Does anyone know where i can find some infos about it?
I would be very interested in some example Vi's and which hardware i need
for this application.
Tom
ROTEX GmbH
Langwiesenstr.10
74363 Gueglingen
Germany
Fax: 0049 (0)7135 103 200 - Tel: 0049 (0) 7135 103 287

Consider posting your question in natinst.public.bridgeview.general by visiting http://zone.ni.com/dev_exchange/newsgroups.htm. The people who monitor that group will be able to respond to your post. Thanks for your cooperation.

Interfacing C++ to a Labview Cluster Using the DataSocket Server

I am new to LabView so please be patient with me here.
I inherited a PC that is running a large, complex LabView application. It used to interface with a second PC that also ran labView, and apparently all was good in the world. The second computer is being replaced with a new system that runs a Visual C++ application which includes Measurement Studio. I am trying to replicate the data exchange between the 2 computers using Measurement Studios CNiDataSocket class.
Here is the problem.
In the original system, the data exchanged between the 2 computers was bundled into a cluster. Measurement Studio has no utilities that support such clustered data as far as I can tell. It seems pretty easy to exchange basic data types and button control values, but not so much with the cluster data. I have tried to fake it by looking at the network packet data format, but I got no where with that. I really don't want to mess with the legacy LabView code if I can help it. I am acutally considering building a small LabView client on the LabView machine that exchanges the data in the "unbundled" form, bundling it up, and sending it off to the DataSocket server. That, of course, will take a fair amount of LabView learning curve which I am trying to avoid.
Anyone have a better idea?

Hi schlew,
Unfortunately your initial suspicions are correct. There is no direct way to read a cluster data type in a C++ environment using Measurement Studio data sockets. There are a couple of different options to read the cluster in. Probably the easiest is the one you mentioned of creating a client within LabVIEW that reads that data from the data socket connection and parses the data into the individual elements. It would be possible to build a dll out of the LabVIEW code so you could call this directly within your C++ code. Here is a link to a KB that explains how to call a LabVIEW dll from C++. As far as creating the dll itself, it is very similar to creating an executable, but in your build options you select to build a dll.
The other option that requires a little more work would be to modify the original LabVIEW code so that it is sending a byte array, and then parse the byte array on the receiving end in the C++ code. Hope this helps!
Pat P.
Software Engineer
National Instruments

Data transfer fro Siemens VFDs and labview software

How can i do data transfer from Siemens VFDs which is having profibus port to labview software?

Start looking here.
http://search.ni.com/nisearch/app/main/p/bot/no/ap/global/lang/en/pg/1/q/profibus/

Connecting my MBP to a amplifier and projector to use as music server

Hi,
I plan on using my MPB as a music server with my hi-def audio system.
I would like to know if the DVI out also supports sound? How can I use my MBP to play all the tunes through the amplifier to my audio setup and also project via my projector so I can surf the net using a BT keyboard and mouse?
The A/V receiver in question is the Denon 3808 and the projector is Panasonic AE-2000.
I would appreciate any help.
Thanks.
Best Regards,
Aditya

short answer, the DVI out port on your mac doesn't carry any sound data. for that you will have to use the headphone jack with adapters if your amp needs a different type of plug.
if you're really serious about the sound quality, you should consider an external USB box. there are many out there that work well with mac osx. i can't think of any off the top of my head, but a quick google search for "USB external sound mac osx" would bring up a few good results.
hope this helps, D

Profibus DP S7 300 Siemens PLC to communicate to LabView 8.0 without using opc server

Does anyone know of a way to communicate with Siemens PLC s7 300 PLC and Step 7 software to LabView 8.2.1 without using a opc server. I'm currently using a opc and it works but it is to slow. Looking for a faster way to move my readings for Siemens to Lab View.

Hi Duck,
Please refer to the below articles:
Profibus Overview
http://zone.ni.com/devzone/cda/tut/p/id/6958#toc1
Using an Applicom Profibus Board
http://zone.ni.com/devzone/cda/tut/p/id/4501
Hopefully these will help you get started.
Aashish M
Applications Engineer
National Instruments
http://www.ni.com/support/

Response time between LabVIEW w/DSC module and RSLinx OPC server hosting FlexLogix PLC tags too long

We are experiencing communication response time delays between LabVIEW with DSC module and RsLinx OPC Server hosting all FlexLogix PLC tags (around 500-600 tags).
The nominal response time for the system watchdog is < 500ms, but we occasionally have spikes of up to 1.5 seconds once every few days even when the system is idling.
Changing more than six PLC connected shared variables at the same time from LabVIEW also causes the watchdog response times to spike above 500ms.
Our watchdog is programmed so that LabVIEW toggles the watchdog bit to 1 as soon the shared variable event detects that the PLC has toggled it to 0. The PLC, however, waits 300 ms until it toggles it.
Our system:
Windows XP SP3
LabVIEW 9 F3
RSLinx Opc Server v2.54
Allen Bradley FlexLogix PLC

What is your update rate set for in the RSLink OPC server?
You aren't toggling the same flag from both ends are you?
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

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

Interfacing PLC siemens S7_300 and LabVIEW DSC using siemens OPC server

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