GodSharp.OpcDa

Opc DataAccess libary for .NET.

Lasted Version

Name	Stable	Preview
GodSharp.OpcDa

Getting Started

1. Initialize

OpcTagItem tags = new OpcTagItem[] 
{
    new OpcTagItem { Id = 1, ItemId = "Channel.Test.Tag1" },
    new OpcTagItem { Id = 2, ItemId = "Channel.Test.Tag2" }
});

Sample 1

OpcDaClient client = new OpcDaClient(x => {
    x.ProgId = "KEPware.KEPServerEx.V4"; //required
    x.Tags = tags;
});

Sample 2

OpcDaClient client = new OpcDaClient();
client.Initialize(x => {
    x.ProgId = "KEPware.KEPServerEx.V4"; //required
    x.Tags = tags;
});

sample 2 same as sample 1.

Sample 3

OpcDaClient client = new OpcDaClient(new OpcDaClientOption()
{
    ProgId ="KEPware.KEPServerEx.V4", //required
    Tags = tags;
});

Sample 4

OpcDaClient client = new OpcDaClient();
client.Initialize(new OpcDaClientOption()
{
    ProgId ="KEPware.KEPServerEx.V4", //required
    Tags = tags;
});

sample 4 same as sample 3.

2. Binding events

Data changed event:

client.DataChange = (param, tags) =>
{
    foreach (OpcTagItem item in tags)
    {
        Console.WriteLine($@"{item.ItemId}:{item.Value.ToString()}");
    }
};

Server shutdown event:

client.Shutdown = (resaon, client) =>
{
    Console.WriteLine("Opc server shutdown.");
};

3. Connect/Disconnect

It will throw InvalidOperationException and message is Opc client is not initialized when you call Connent method if not initialized.

// Connect
client.Connent();

// Disconnect
client.Disconnect();

You can get connect status by client?.Connected.

4. Add tags

If you want to add tags, you must first connect to opc server.

Add single tag

client.AddTags(new OpcTagItem { Id = 3, ItemId = "Channel.Test.Tag3" });

Add multi tag

client.AddTags(new OpcTagItem[] 
{
    new OpcTagItem { Id = 3, ItemId = "Channel.Test.Tag3" },
    new OpcTagItem { Id = 4, ItemId = "Channel.Test.Tag4" }
});

5. Remove Tags

Remove single tag

client.RemoveTags(3); // OpcTagItem.Id
client.RemoveTags("Channel.Test.Tag3"); // OpcTagItem.ItemId

Remove multi tag

client.RemoveTags(new int[]{ 3, 4 });
client.RemoveTags(new string[]{ "Channel.Test.Tag3", "Channel.Test.Tag4" });

6. Remove Tag Groups

Remove single tag group

client.RemoveGroup("Channel.Test.Group1");

Remove multi tag group

client.RemoveGroups(new string[]{ "Channel.Test.Group1", "Channel.Test.Group2" });

7. Read Tags

Read single tag value

object val = client.SyncReadValue("Channel.Test.Tag1");

Read single tag

OpcTagItem val = client.SyncRead("Channel.Test.Tag1");

Read multi tag

IEnumerable<OpcTagItem>  tags = client.SyncRead(new string[]{ "Channel.Test.Tag1", "Channel.Test.Tag2" });

8. Write Tags

Write single tag value

client.AsycnWriter("Channel.Test.Tag1",val);

Write multi tag

OpcTagItem[] items = new OpcTagItem[]
{
    new OpcTagItem(){ ItemId="Channel.Test.Tag1" },
    new OpcTagItem(){ ItemId="Channel.Test.Tag2" }
};
client.AsycnWriter(items);

License