Hi guys,

currently i have trying to collecting value from global variable from codesys.
1st time i have tried create script python to reading value and execute from codesys, result is value able to read.
2nd time i have tried create 1 application from C#.Net visual studio 2015, have error coming, error is like on below :

script on python:ReadVariable.py

from future import print_function;
import

close open project if necessary:

if projects.primary:
projects.primary.close()

opens project

proj = projects.open(r"C:\Testing Integration\Untitled1.project")

set "Ampel.project" to active application

app = proj.active_application
onlineapp = online.create_online_application(app)

login to device

onlineapp.login(OnlineChangeOption.Try, True)

set status of application to "run", if not in "run"

if not onlineapp.application_state == ApplicationState.run:
onlineapp.start()

wait 1 second

system.delay(1000)
def TagsCall(*Tags):
value1 = onlineapp.read_value(Tags[0])
value2 = onlineapp.read_value(Tags[1])
value3 = onlineapp.read_value(Tags[2])

TagsCall("POU.GVL.v1Real","POU.GVL.v2Real","POU.GVL.v3Real")

log out from device and close "Ampel.project"

onlineapp.logout()
proj.close()
script on Visual Studio 2015 :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

using IronPython.Hosting;
using Microsoft.Scripting.Hosting;
using IronPython.Modules;
using IronPython.Runtime;
using IronPython.Compiler;
using IronPython.Zlib;
using IronPython.SQLite;

namespace Codesys_Adapter
{
static class Program
{
///

<summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main(string[] args)
{
var ipy = Python.CreateRuntime();
dynamic test = ipy.UseFile(@"..\..\ReadVariable.py");
test.start_element();
Console.ReadLine();
}
}
}
can you help me to suggestion best practice or step by step document to integrated to Visual Studio 2015.

PLC handler would be the default works with all CODESYS communication API. Details at Link

OPC UA is available in many runtimes, so I would find a C# OPC UA client if your controller supports this. Eg Link 2

Also, you can use one of the fieldbusses that your controller supports, and find a corresponding library for C#.

Alternatively, there are some communication libraries that may be appropriate for your use cases. Net Based Services library can send some TCP or UDP packets, you can also purchase the MQTT library for CODESYS for a more IIoT approach, and find an MQTT library for C#, and find an MQTT broker.

My answer is quite generic, but if you answer Martin, you may get a more tailored response from him.