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Delta PLC Communication
How to communicate with PLC


I am using DELTA PLC. I want to pick up the hi speed counter value from PLC. The data I am getting on Modscan software. But how should I get the data in vb 6.0?

By Shriram Pendse on 5 April, 2008 - 4:58 pm

Presently I am breaking my head on this same topic. Delta connects on Modbus OPC, so thru this you can get data in VB. It is also possible to link using DVP protocol developed by Delta which is closely simmilar to Modbus. I could read/write on this protocol thru Hyper terminal. Now next step is thru VB.

Read Delta PLC's protocol document and InTouch connectivity document ( Available on Delta's site for free download). If you successfully do this pls inform me too.

Thanks and regards,
Shriram Pendse

By Shriram Pendse on 13 December, 2008 - 4:57 am

As Delta PLC supports Modbus, it is very easy to Connect it to VB application. delta site now has posted sample code for this, it works, I have already used it in my VB based SCADA.

Shriram Pendse

By Delta PLC Communication on 5 September, 2009 - 4:42 am

Hi Shriram Pendse..

Can u give me some sample coding to connect delta plc dvp-10sx series using vb or or

still i'm Surfing i can't get any sample codes and demo's.Can u aid me how to connect and read/write data register values in plc. I'm new to this field to connect pcl. I don't have any basic knowledge in this so kindly give me a guide to do this process.

Tks in Adv.


The most reliable way to integrate Modbus communication in VB is to use a professional ActiveX control. You can visit or


you can communication with Delta PLC use Delta Modbus DLL Library. Maybe you can find it in this path.

when you install it, you can get sample about communication code (vb code). if you don't find it still. then give you my bolg path. you can download it in first page. but my bolg's language is Chinese format.

Don't forget login in.the use name and password pls see down
use name: fortune
password: 888888

You can use modbus activex professional.