Advanced HMI, BeginReadMultiple, C# Script

[Taylor Turner]

Having a hard time getting the data received when using BeginReadMultiple. Not the most familiar with the ClxDriver and EthernetIPforCLXCom() usage.

using ClxDriver.Common;
using cPLCAppCom;

namespace PLCTest
{
    class PLCinit
    {
        public EthernetIPforCLXCom plcCom = new EthernetIPforCLXCom();

        public void Config()
        {
            System.Diagnostics.Debug.WriteLine("Hello Config");
            plcCom.CIPConnectionSize = 508;
            plcCom.DisableMultiServiceRequest = false;
            plcCom.DisableSubscriptions = false;
            plcCom.IniFileName = "";
            plcCom.IniFileSection = null;
            plcCom.IPAddress = "x.x.x.x";
            plcCom.PollRateOverride = 500;
            plcCom.Port = 44818;
            plcCom.ProcessorSlot = 0;
            plcCom.RoutePath = null;
            plcCom.Timeout = 4000;
            plcCom.UseOmronRead = false;
            plcCom.DataReceived += new System.EventHandler<PlcComEventArgs>(TagDataReceived);
            
            string[] tags = new string[2];
            tags[0] = "test1";
            tags[1] = "test2";
            plcCom.BeginReadMultiple(tags);
        }

        private void TagDataReceived(object? sender, PlcComEventArgs e)
        {
            System.Diagnostics.Debug.WriteLine("Hello Data");
            string read_tags = e.Values[0];
            System.Diagnostics.Debug.WriteLine(read_tags);
        }

    }
}

 

[drbitboy]

are you seeing any error messages?

 

[shawn_75]

I don't know C# very well, but is that "?" supposed to be there

private void TagDataReceived(object? sender, PlcComEventArgs e)


Also, if you put a breakpoint in on the plcCom.BeginReadMultiple(tags); line, do all of the properties of plcCom look correct?

 

[drbitboy]

https://stackoverflow.com/questions...n-mark-after-a-value-type-for-example-int-myv


huh.

 

[Taylor Turner]

Thanks for the replies. I'm realizing the method TagDataRecieved()isn't even being called. I'm not quite understanding how ".DataReceived" and that method works together. I found Advanced HMI's forum. We'll see if I get a response. Archie runs the show over there. He's on here too, but it looks like he hasn't been online in a year.

 

[drbitboy]

I deleted that previous post. I looked into it further and am not sure at all how AdvancedHMI fits into an event handler framework, so perhaps it's better if I do not add confusion to the mix.

 

[Taylor Turner]

I deleted that previous post. I looked into it further and am not sure at all how AdvancedHMI fits into an event handler framework, so perhaps it's better if I do not add confusion to the mix.

I appreciated the info. Still cracking at it.

 

[lostcontrol]

FYI,
Archie is the creator of AdvancedHMI

 

[SD_Scott]

Thanks for the replies. I'm realizing the method TagDataRecieved()isn't even being called. I'm not quite understanding how ".DataReceived" and that method works together. I found Advanced HMI's forum. We'll see if I get a response. Archie runs the show over there. He's on here too, but it looks like he hasn't been online in a year.

TagDataReceived() is an event handler. The event is being subscribed to in the above statement that contains the += operator. That event gets fired in another area of the code. If you put a breakpoint inside TagDataReceived() and it never hits it, then either the event isn't being fired or it isn't being subscribed to. Place a breakpoint at the line that contains the += operator to make sure it is being subscribed to. Also you can delete and re-enter the line.

Type in plcCom, then hit the dot char, Then let visual studio find DataReceived in the drop down intelesense. Then type += then hit the tab key twice. It will stub out the event handler for you ensuring the arguments are correct.

I'm not a user of advanced HMI but I have many years of C# experience including PLC drivers and middleware/database.

Hope that helps.