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Hi friends, I am working on an application which involves serial port communication with stepper motors. Now I am sending queries to the PLC via modbus protocol. There is one query in which I ask the PLC for the current position of the moving motor and display it in a current position textbox...

Hi friends, I have been working on an activeX control which works on serial port communication. Now I have completed the project and created its setup.exe using Visual studio 6 -> Tools -> Package and Deployment Wizard. Then I installed the control in another PC and in a new project included the...

Hi friends, I was trying to use vb.net control in VB6, I followed the instructions and got it working. Heres wat i did: 1. Installed windows interop forms toolkit application 2. Created a control in VB.net using Visual_studio_team_system_2008_team_suite 3. Built the project 4. Opened new VB6...

Hi friends, I have been working on an application in VB.net, after I finished the application now the customer wants its ActiveX control not the standard exe that I made. So I want to know that is there anyway tht I can create an ActiveX in Vb.net ?? I am using Visual Studio 2008. I did some...

Hi friends, I have been working on a project that communicates with PLC machines via modbus protocol. Now I have completed the application and sent the EXE file to the customer. But he says he wants ActiveX exe not the standard exe that I sent him. So I need your suggestions on how to do this as...

Hi friends, I am working on an application in which I have to send a data of a text file to a PLC machine. Now the convention is that send start of file (0x02) send data bytes (file data) send end of file (0x03) Now I dont have any idea that how to send the STX and ETX before and...

Hi friends, I am currently working on an application which requires reading, writing and modifying data from a TEXT file. I have searched a lot but was not able to find a simple way to achieve this. I have to use a standard VB form with textboxes for ths text file opearitions. So anyone who has...

Hi friends..I m working on an application on serial port communication with PLC machine. Now this communication is only done with one PLC at a time. So I m sending a query to PLC and untill its responds back the application goes into wait mode. i.e. no other operations can be done, and an...

Hi friends, I m working on an application which communicates with PLC machine using Modbus protocol. Now i m able to generate and communicate a modbus data frame with PLC the only problem that i m facing is that in all the data frames of modbus the last ascii characters should be Carriage return...

Hi friends, I m new to this forum and also to VB.net programming. In an application Modbus protocol is used and I have generate LRC checksum for that. But I am stuck at conversion of a Long type data to Byte type. The long type data is for example : 4294967197. I tried all the following...