Here is the CODE

[rishidamco]

This is the I am calling from client:

---

    const int DataTimeout = 5000;
    static void Main(string[] args)
    {
        var plcClient = new PlcTag();
        string ipAddress = "101.60.131.238";
        string path = "1,0";
        string name = "F8:01";
        int elementSize = 4;
        int elementCount = 1;
        int debugLevel = 1;
        string error = null;
        Tag tag = new Tag(ipAddress, path, CpuType.PLC5, name, elementSize, elementCount, debugLevel);
        var rc = plcClient.ReadTag(tag, DataTimeout);
        if (rc != PlcTag.PLCTAG_STATUS_OK)
            error = plcClient.DecodeError(rc);
        /* read the data */
        for (int i = 0; i < tag.ElementCount; i++)
        {
            float value = plcClient.GetFloat32Value(tag, (i * tag.ElementSize));
        }
    }

---

The ReadTag method is giving error:
An unhandled exception of type 'System.Collections.Generic.KeyNotFoundException' occurred in mscorlib.dll
}

---

public class PlcTag: IDisposable
{
private readonly Dictionary<string, IntPtr> _tags;
public PlcTag()
{
_tags = new Dictionary<string, IntPtr>();
}
public int ReadTag(Tag tag, int timeout)
{
var result = plc_tag_read(_tags[tag.UniqueKey], timeout);
return result;
}
[DllImport("plctag.dll", EntryPoint = "plc_tag_read", CallingConvention = CallingConvention.Cdecl)]
static extern int plc_tag_read(IntPtr tag, int timeout);

}

---

[mesta1]

You have to call AddTag before using it. See the example

client.AddTag(tag);

/* let the connect succeed we hope */
while (client.GetStatus(tag) == Libplctag.PLCTAG_STATUS_PENDING)
{
    Thread.Sleep(100);
}

[rishidamco]

Thank for the update, now I added the code and getting error saying PLCTAG-ERROR-TIMEOUT Same tag works file when I call directly using PLC tag rw program.

…

Sent from my iPhone

On Sep 9, 2017, at 2:31 PM, Michele Cattafesta ***@***.***> wrote: You have to call AddTag before using it. See the example ''' client.AddTag(tag); /* let the connect succeed we hope */ while (client.GetStatus(tag) == Libplctag.PLCTAG_STATUS_PENDING) { Thread.Sleep(100); } ''' — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or mute the thread.

[mesta1]

You should use this Tag constructor and adapt it to Plc5
var tag = new Tag("192.168.0.100", CpuType.SLC, "B3:0", DataType.Int16, 1);

[rishidamco]

Still getting the same error.

…

Sent from my iPhone

On Sep 9, 2017, at 3:17 PM, Michele Cattafesta ***@***.***> wrote: You should use this Tag constructor. var tag = new Tag("192.168.0.100", CpuType.SLC, "B3:0", DataType.Int16, 1); — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or mute the thread.

[rishidamco]

Any update I am connecting PLC 5.

…

Sent from my iPhone

On Sep 9, 2017, at 3:17 PM, Michele Cattafesta ***@***.***> wrote: You should use this Tag constructor. var tag = new Tag("192.168.0.100", CpuType.SLC, "B3:0", DataType.Int16, 1); — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or mute the thread.

[mesta1]

Can you post the updated code ?
Also if you write string name = "F8:1"; instead of "F8:01" does it work ? I suspect there is a problem with the tag declaration.

[rishidamco]

Hi there, Finally I was able to resolve all my network issues etc and able to get the data out. One question, how we read string data. Regards, Rishi

…

Sent from my iPhone

On Sep 10, 2017, at 11:36 AM, ***@***.*** wrote: Any update I am connecting PLC 5. Sent from my iPhone > On Sep 9, 2017, at 3:17 PM, Michele Cattafesta ***@***.***> wrote: > > You should use this Tag constructor. > var tag = new Tag("192.168.0.100", CpuType.SLC, "B3:0", DataType.Int16, 1); > > — > You are receiving this because you authored the thread. > Reply to this email directly, view it on GitHub, or mute the thread. >

[mesta1]

I forgot to push the example.
Check it here:
https://github.com/mesta1/libplctag-csharp/blob/master/Slc500Strings/Program.cs
You can read maximum 1 string per request, so don't try to increase the element count, it will not work.

[rishidamco]

Thanks for the update, it's working fine for me now. Any idea if I can get all the available tags list out from PLC? Regards, Rishi

…

On Thu, Sep 21, 2017 at 4:25 PM, Michele Cattafesta < ***@***.***> wrote: I forgot to push the example. Check it here: https://github.com/mesta1/libplctag-csharp/blob/master/ Slc500Strings/Program.cs You can read maximum 1 string per request, so don't try to increase the element count, it will not work. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#2 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AcQv8CYPlGx1ELdNKme6hVJD3g3DBoVrks5sksYugaJpZM4PSE82> .

[sajjaharikrishna]

Hi, i am trying to communicate with AB Micro820. It showing error in reading Tag. Created Tag as follows:
Tag tag = new Tag(IpAddress,"1,0", CpuType.LGX, Address, DataType.Int32, 1);
ERROR: Unable to read the data! Got error code -33: PLCTAG_ERR_REMOTE_ERR
please provide solution.

Thanks.

[ghost]

I just wanted to say thank you for your youtube video and having this be open source. This is super helpful.

[shyamsrg]

Hi, Thanks For Your Efforts
I have tried one of your example of slc string. but its not working
i am using MicroLogix1400 and c# to read string values from plc but in my case status is OK but cant read the tag
So it will very help full if i get to know that how to read string data type
Thanks In Advance