Keyboard Input Negative (-) Value.

[joko markono]

Hi All,

I've read this thread:
https://www.advancedhmi.com/forum/index.php?topic=136.msg268#msg268

Seems that there is no solution to input the negative value (if i don't miss anything there).

I'm setting up a page where i can always change the minimum and maximum value from the HMI.
The problem is i cannot enter negative numbers. I will get this warning: Failed to write value-Arithmetic operation resulted in an overflow.

Is there any way i can solve this problem?

[Archie]

Are you using version 3.99x or 3.99y ?

[joko markono]

It's 3.99y

[Archie]

What negative number are you trying?

[joko markono]

Any none decimal negative value. For example -6237

[Archie]

I will have to setup an Omron PLC and test this. The only reason I can see that you would get that error is if you exceeded the limits of a 16 bit integer. For example -32800

[joko markono]

i appreciate that. my number will not reach -XXXXX.
FYI, I got the error even before i connect to PLC.

[Archie]

Does this also happen if you use a BasicLabel and set the PLCAddressKeypad ?

Do you have anything in the ScaleFactor property?

[joko markono]

Yes, same thing. The scale value for the basic label is 1.

[joko markono]

I'm just following up if there is any update on this?

[Godra]

Can you explain what driver you are using, what are those controls in the first picture you posted (more details)?

What does this mean:

I got the error even before i connect to PLC.

[joko markono]

I'm using Omron serial hostlink protocol.
that statement means, before I connect the serial port to my PLC, there's already an error warning when I enter -ve value.

[Archie]

The problem comes from this code:

Code: [Select]

        '**************************************
        '* Convert an integer value to Hexadecimal
        '**************************************
        Public Shared Function IntToHex(ByVal data As Integer) As String
            If data < 16 Then
                Return "000" & String.Format("{0:X}", data)
            ElseIf data < 256 Then
                Return "00" & String.Format("{0:X}", data)
            ElseIf data < 4096 Then
                Return "0" & String.Format("{0:X}", data)
            Else
                Return String.Format("{0:X}", data)
            End If
        End Function

It is supposed to return 4 characters representing the hex value, but a negative value doesn't work.

I'll try to look for a fix later, but if anyone can suggest a fix in the mean time, I'll give it a go.

[Godra]

Maybe this:

Code: [Select]

    '**************************************
    '* Convert an integer value to Hexadecimal
    '**************************************
    Public Shared Function IntToHex(ByVal data As Integer) As String
        If data < 0 Then
            Return Hex(data).Substring(4) 'or Hex(data).TrimStart("F").PadLeft(4, "F"c)
        Else
            Return Hex(data).PadLeft(4, "0"c)
        End If
    End Function


[Archie]

I'm getting an error about the function Hex

Do you know where that is coming from?