PLC Interfacing using Visual Basic and RSLinx 4

[garyjh]

Hello Guys

I am new to PLCs so please bare with me on this.

I am working on (or at least trying to) an application that uses a PLC. I will be communicating to this PLC via the ethernet and RSLinx.

I am assuming that RSLinx will be setup with the address or IP address of the PLC, is this correct?

Inside of RSLinx will be a data table that I can query somehow from within Visual Basic to get the status of some event or possible start an event by setting a bit or byte
am I on the right track so far?

How would I go about addressing the PLC and the data tables?
Does any one out there have an example of how I might do this?

Thank You

Gary

 

[ACHANG]

HELLO, EVERYBODY,
WOULD YOU HELP[ ME TO SOLVE THIS PROBLEM. lAST TIME I USING hizac PLC FROM hitachi. But i want to print out the ladder from cpu, with RS 232. Maybe somebody tell me how to connect from cpu to printer (dot matrix).

thanx.

Hasan.

 

[knowledgeconsumer]

Hi Guys,
Im new to this forum so bare with me. I have been reading all the info ye have supplied in relation to VB accessing PLC data through RS Linx(OPC)/gateway setup. Im in the process of trying to set this up on a test system, with little VB experiance im finding it difficult to start off on the right foot!
Keith, you have presented what i think is the answer to my problem, could i see a sample of what you have spoken about, im sure it will help me a lot as I am new to the VB field but have extensive PLC experiance.
Thanx in advance

 

[LeJV]

Keith,
I'd also like a peek at your VB code.
As others are, I'm looking at building an application to monitor a couple of tags and record them to MS Access or a flat file. A second application will read a user selectable span of data, display it, and optionally export it.

Thanks in advance.

 

[industrialsoftwareNK]

You should look at OPCWare Client Developer (

http://www.opcware.com),

which makes logging OPC data to a database or flat file a snip. The demo includes examples of logging OPC data to an access database, logging to a csv file, and logging to a database via ODBC/DSN.

 

[Electromechanical30]

Hi all.
I have successfully created an HMI using VB6. This can be done by downloading after market drivers. Refer to a previous thread from this forum.

http://www.eng-tips.com/viewthread.cfm?qid=89373