AdvancedHMI Software

General Category => Support Questions => Topic started by: Jie on October 04, 2020, 02:51:09 AM

Title: Unable to Use ModbusRTUCom Driver directly via code
Post by: Jie on October 04, 2020, 02:51:09 AM

Hi,

I am trying to make the VB.Net send the value to PLC (Panasonic FP0R)
If i am using Basic Button or Basic Label, it works.
But if i am using below code, ModbusRTUCom is not declared error came out on Visual Studio 2019

ModbusRTUCom.Write(400003, txtFinalOutput.Text)

I trying to declare as below just for testing, but no data register changes on the PLC.
 Dim driver As New AdvancedHMIDrivers.ModbusRTUCom
            driver.Write("400003", "1")

Any idea ?

Title: Re: Unable to Use ModbusRTUCom Driver directly via code
Post by: Godra on October 04, 2020, 03:29:00 AM

By creating a new driver you are using its default parameters, which might not match your setup.

See this topic:  https://www.advancedhmi.com/forum/index.php?topic=1545.0

Title: Re: Unable to Use ModbusRTUCom Driver directly via code
Post by: Jie on October 04, 2020, 03:32:41 AM

Hi Godra,

Thanks for the link,

is there any way to just use ModbusRTUCom.Write(400003, txtFinalOutput.Text) without getting an error "ModbusRTUCom is not declared" in VS2019 ?

Title: Re: Unable to Use ModbusRTUCom Driver directly via code
Post by: Godra on October 04, 2020, 05:09:36 PM

You have to have the driver declared, whether by adding it to the form or by creating it in the code.