What Is Modbus And How To Work Modbus Application


MODBUS is an application layer messaging protocol, positioned at level 7 of the OSI model,
that provides client/server communication between devices connected on different types of
buses or networks.
The industry’s serial de facto standard since 1979, MODBUS continues to enable millions of
automation devices to communicate. Today, support for the simple and elegant structure of
MODBUS continues to grow. The Internet community can access MODBUS at a reserved
system port 502 on the TCP/IP stack.
MODBUS is a request/reply protocol and offers services specified by function codes.
MODBUS function codes are elements of MODBUS request/reply PDUs. The objective of this
document is to describe the function codes used within the framework of MODBUS
transactions.
MODBUS is an application layer messaging protocol for client/server communication between
devices connected on different types of buses or networks.
It is currently implemented using:

  •  TCP/IP over Ethernet. See MODBUS Messaging Implementation Guide V1.0a.
  •  Asynchronous serial transmission over a variety of media (wire : EIA/TIA-232-E, EIA-422, EIA/TIA-485-A; fiber, radio, etc.)
  • MODBUS PLUS, a high speed token passing network.


23:21 | Category: | 0 comments

SQL Server Insert Stored Procedure Insert


          A stored procedure is nothing more than prepared SQL code that you save so you can reuse the code over and over again.  So if you think about a query that you write over and over again, instead of having to write that query each time you would save it as a stored procedure and then just call the stored procedure to execute the SQL code that you saved as part of the stored procedure.

     CREATE PROCEDURE dbo.insert_student
    @Stud_name    varchar(MAX),
    @Stud_roll_no varchar(MAX)
AS
   insert into student_data
   (
       Stud_name ,
       Stud_roll_no
    )
values
    (
         @Stud_name ,
         @Stud_roll_no
     )
       RETURN
    
11:22 | Category: | 0 comments

how to remove button border in c#

By providing these properties to your button you can completely remove

BORDER of your button control. The flat-style button property is the
 
best property to set when you are working with custom button control.

you have to define this property into  Page load method.

Btnsubmit.TabStop = false;
Btnsubmit.FlatStyle = FlatStyle.Flat;
Btnsubmit.FlatAppearance.BorderSize = 0;
Btnsubmit.FlatAppearance.BorderColor = Color.FromArgb(0, 255, 255, 255);



08:57 | Category: |

Used Ifream In Asp.Net

used ifream in asp.net in the all the part of outer website access all data

<div style="height:100%; width:100%">
<iframe id="MyIframe" runat="server" src="http://devloper4u.blogspot.in/"
scrolling="auto" frameborder="0" style=" overflow:scroll;
 width:100%; height:100%;"  ></iframe>
</div>
21:53 | Category: |

i do not working with enter key press 

in this code to not working with login or submit in to direct 
submit or login with enter key to press
 
 
 
 
 <script type="text/javascript">
//attempting to capture keypress for chrome here but this is not working
        $("#txtContainer").keypress(function (e) {
            if (e.keyCode == '13') {
                e.preventDefault();
                doClick(buttonname, e);
                return false;
            }
        });

        function doClick(buttonName, e) {

            var key;
            if (window.event)
                key = window.event.keyCode;     //IE
            else
                key = e.which;     //firefox

            if (key == 13) {
                var btn = document.getElementById(buttonName);
                if (btn != null) { 
                    btn.click();
                    event.keyCode = 0
                } 
            }
        }
</script>
05:05 | Category: | 0 comments