Connecting a plc without opc server

hi, can i connect a plc to labview 7.1 (to send and read data) without an opc server, using just an rs232 cable from plc to pc.
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syd_b,
RS232 is just the physical interface, but it says nothing about the communication protocol. Allen Bradley PLCs use several serial protocols, e. g. the DF-1 protocol. You can either try to implement the protocol by yourself by using VISA calls (good documentation is required) or you can purchase a library. NI doesn't offer an Allen-Bradley library for LabVIEW, but I have found a vendor with a quick Google search.
Jochen

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Problem Connecting Shared Variable to OPC Server

Hi All,
I use LBW 8.2.1 and DSC.
I try to connect to an OPC server : Emerson DeltaV
When using Datasocket, I am able to connect to the DeltaV OPC server and browse (DSTP Server) to the variables I want to Read/Write.
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Dai
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Hi,
I do not trust datasocket for this. I already tried with LBW 7.1and after something like 150 datasocket connections to DeltaV OPC, some variables do not respond anymore.
It's kinda wierd. It happens to groups off variables. Just add one more connection and a all bunch off the other connections freeze. Remove it and it comes back...
One application Engineer of NI told me at the NiDays that datasocket was not meant for so many variables and that I had to use DSC.
He said something like : "Now you know why datasocket ships with Labview and that you have to pay for DSC..."
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Dai
LV 7.1 - WIN XP - RT - FP

Problems connecting to a remote OPC server in write mode using CWDataSocket control

Hi.
I have been struggling with an odd feature when trying to connect to a remote OPC server using CWDataSocket control, though I'm not sure if it's a CWDataSocket related problem. But anyway, the following error occurs: "Active: Can't write data." Error number: "-2147467259". Now, when I connect to a local OPC server
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I am trying to bind Indicator using DSTP server that gets data from Yudian controller AI706M.
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Hi there,
According to the following link, you might not be able to connect your PLC to LabVIEW:
http://www.ni.com/white-paper/6417/en
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Hello,
Can you explain exactly how you are attempting to connect to this OPC Server and also any of it's properties that are set in Server Explorer. At what point do you get this message? Have you been able to connect to that OPC Server on that machine, or any machine before?
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Hi Roland,
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http://www.opcfoundation.org/DownloadFile.aspx?RI=326
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Please download the NI OPC Servers Evaluation-Version to test communication.
NI OPC Servers
http://sine.ni.com/nips/cds/view/p/lang/en/nid/209059
Download NI OPC Servers Evaluation
https://lumen.ni.com/nicif/us/evalopc/content.xhtml
Regards
Ulrich

Trouble connecting to an OPC server

Hi guys,
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Our lab was shut down for the holidays period, so I couldn't try anything for a while. Back on it now though.
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OPC server setting

Hi
I`have developed an application client which has shared variables bounded with an OPC server of NI. Sever and Client are on the same machine. My executable works very well.
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Thanks
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Hi,
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Best Regards,
Remzi A.
National Instruments

Fieldpoint OPC server freezes up

A Honeywell DaVinci system communicates with Fieldpoint OPC server. After working properly for hours, the analog outputs would not respond to write updates from DaVinci system. I tried to use FactorySoft OPC client to connect to the Fieldpoint OPC server and also could not manipulate the analog outputs. However, I could still change the outputs using the Fieldpoint explorer. Please advise how to fix this problem.

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http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=137&HOID=5065000000050000000DF60000&HTHREAD=000062989&UCATEGORY_0=_18_%24_17_&UCATEGORY_S=0
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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?).
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-- DanJack, NUC Norway
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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

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/

Is it possible to connect labview with opc server without using NI dsc Module ?

Hellow sir,
I want to get data over labview using OPC server and i am not using any dsc module vi (Alams, print, GUI, security).I am using share variable to get data from OPC server to labview. Now i want to deploy that application to third party computer. (where there is no NI software is installed)
i am using labview 8.6 and 2009.
Many ? like....
1) what is the procedure to install that application in third party computer.
2) Do i need to use my dsc run time licence..?
waiting for your valuable feed back.
Thank you.
CLAD
Labiew programmer

Hi, When you connect to NI OPC Server by creating New I/O Server > OPC Client. You will see all registered OPC Servers running on local machine or remote machine. I used KepServerEx from Kepware and LSIS OPC Server from LG with no problems. Just make sure that the OPC server is running.
Hope it helps
Waleed El-Badry MSc.,MCPD, ISTQB Certified Tester
Assistant Lecturer
Mechatronics Department
Faculty of Engineering
Misr University for Science & Technology
Attachments:
LG.png ‏57 KB

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 KB

https://decibel.ni.com/content/docs/DOC-38858
Atom
Certified LabVIEW Associate Developer

CRIO communicating as PLC with NI-OPC-Server

Hi there,
i have the task to implement a communication between multiple cRIO's and the NI-OPC-Server. The NI-OPC-Server has to act as data handler for a complex frontend.
I tried out the NI-OPC-Server and i was successful in communicating with the NI-OPC-Server as OPC-Client in Windows using an IO-Server and Shared Variables. But the task is to do this on a cRIO. I tried to open a data socket connection from a cRIO to the NI-OPC-Server using a specific URL using "DataSocket Select URL.vi". But as long i do not activate simulation in the NI-OPC-Server i get errors on opening the data socket connection. If i do activate the simulation, which is not the solution, i can write some data without error but the Quick Client of the NI-OPC-Server sees no changes for that data tag.
I have the feeling i am not at a good way to get this working. Is there anybody having experiences with this? Is data socket a possible way at all? Is it possible at all? Do i need to implement a cRIO-OPC-driver?
Thank you.
Solved!
Go to Solution.

Hi,
There's one pretty good tutorials and one webcast. Have you already study them?
Connect LabVIEW to Any PLC Using OPC (Tutorial)
http://www.ni.com/white-paper/7450/en
Connect LabVIEW to Any PLC Using OPC (Webcast)
http://zone.ni.com/wv/app/doc/p/id/wv-263
Chers,
Philip

Connecting a plc without opc server

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