Recent Posts

81

Feature Request / Re: LIVE VIDEO WITH SAVE FUNCTION

« Last post by smithpetermark@gmail.com on February 11, 2024, 02:17:29 AM »

I cannot get this control working and in fact now my Solution is throwing errors.

I know this post is old.

I deleted the control and the dll resource and have no errors and will try again.

OK -  reread the instructions and succeeded.  I used the encoder from here btw: https://sourceforge.net/projects/x264vfw/

82

Open Discussion / Re: ON/OFF Button for bit in a register Modbus TCP

« Last post by Nikola Tesla on February 05, 2024, 01:51:08 PM »

in conjunction with the subtract you want to use a logical AND.

ModbusTCPCom1.Write("40001", Value AND (65535 - 2 ^ (b_Num - 1)))

I can't test that right now, but the 65535 assumes it is an unsigned 16 bit integer, it may need to be a 32767

Thanks Archie!

I have just teste with a ModbusPal Tcp Servidor Simulator and run with 65535 y 32767, this week I'll test with a plc.

83

Open Discussion / Re: ON/OFF Button for bit in a register Modbus TCP

« Last post by Archie on February 05, 2024, 01:24:07 PM »

in conjunction with the subtract you want to use a logical AND.

ModbusTCPCom1.Write("40001", Value AND (65535 - 2 ^ (b_Num - 1)))

I can't test that right now, but the 65535 assumes it is an unsigned 16 bit integer, it may need to be a 32767

84

Open Discussion / ON/OFF Button for bit in a register Modbus TCP

« Last post by Nikola Tesla on February 05, 2024, 01:18:02 PM »

Hi, I'm new with VB and I was looking for some forum posts to create a couple of buttons for an application. The first button is to set to 1 independent bits of a modbus tcp register and for that I have used Godra's code in another post:

Private Sub BasicButton1_Click(sender As Object, e As EventArgs) Handles BasicButton1.Click
    Try
        Dim b_Num As Integer = 1 'or if dynamically changing then call it from a TextBox, like: Dim b_Num As Integer = TextBox1.Text
        Dim Value = Me.ModbusTCPCom1.Read("40001")
        Me.ModbusTCPCom1.Write("40001", Value Or 2 ^ (b_Num - 1))
    Catch ex As Exception
        System.Windows.Forms.MessageBox.Show("Failed to write value. " & ex.Message)
    End Try

 The second button I created to disable the bit of the word I enabled earlier and for this I used the same Godra code and changed the following command:

Me.ModbusTCPCom1.Write("40001", Value - 2 ^ (b_Num - 1)).

The off button is only connected and appears on screen if the bit it disables is set to 1, but if you quickly hit the button before the associated bit is disabled, it is able to subtract more than once the same bit, how could I avoid it to subtract more than once and not modify the register in a wrong way? Can you think of another way to create an off/on button for independent bits of a register?

85

Feature Request / Re: Multiple StationAddress from one ModbusRTUCom in one Form

« Last post by fayeq on February 05, 2024, 01:47:59 AM »

up

86

Open Discussion / 1756-L81E 5580 Controller f/s

« Last post by kingparmer on February 02, 2024, 09:44:57 AM »

Have an extra controller still in factory sealed box, It was ordered for a project and ended up not needing.

$2500 obo

LMK if anyone is interested.

87

Support Questions / Re: System.StackOverflowException while trying to closed form

« Last post by thunting on February 01, 2024, 08:08:58 AM »

Sorry, I found my answer. Thanks for the help

Here is the link for the answer to my question.
https://www.advancedhmi.com/forum/index.php?topic=303.msg1069#msg1069

88

Support Questions / Re: System.StackOverflowException while trying to closed form

« Last post by thunting on February 01, 2024, 08:07:20 AM »

I noticed after removing the above listed code from the forms, other than the Main, the application does not close. I realize this is what Archie mentions in his post, but I'm unsure how to fix the application not closing from other forms than the Main. Or is the expected method to remove the "close" button from the title bar of the other forms and force users to return to the Main form to close the application? Any suggestions?

89

Support Questions / Re: System.StackOverflowException while trying to closed form

« Last post by thunting on January 31, 2024, 05:30:42 PM »

Thanks Archie, that fixed it.

90

Support Questions / Re: System.StackOverflowException while trying to closed form

« Last post by Archie on January 30, 2024, 05:17:48 PM »

That piece of code should only be in the MainForm or the Mainmenu form, which would be the only form being closed to exit the application.