Issue in connecting CompactLogix 5380 controller

Brajesh Srivastava

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Nov 26, 2024, 8:46:16 AM11/26/24

to libplctag

Hi All,

Can somebody help in connecting plc using libplctag.ddl, in visual studio 2022.

returning error -32

Regards

Brajesh

Kyle

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Dec 2, 2024, 10:44:43 AM12/2/24

to libplctag

HI Brajesh,

Thanks for using libplctag. Usually that error means that there was a timeout. That usually means that the PLC is not reachable or that you are using the wrong IP address. Check those first and see if that helps.

Best,

Kyle

Brajesh Srivastava

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Dec 2, 2024, 10:59:09 PM12/2/24

to Kyle, libplctag

Hi Kyle,

But the same IP address was connecting with python code.

How would you rate your experience with us?

Best Regards,

Brajesh Kumar Srivastava

Technical Manager Software

M: +91 8800334819

W: www.barcodeindia.com

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Kyle

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Dec 2, 2024, 10:59:53 PM12/2/24

to libplctag

Can you provide the entire set of settings that you use to initialize the tag handle? The IP, the path, the PLC type etc.

Best,

Kyle

Brajesh Srivastava

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Dec 2, 2024, 11:36:13 PM12/2/24

to Kyle, libplctag

Yes sure.. Please check the code.

private void Form1_Load(object sender, EventArgs e)
{
try
{
var tag = new Tag("192.168.56.1","1,0", CpuType.SLC, "read1", DataType.Int16, 1);
using (var client1 = new Libplctag())
{
client1.AddTag(tag);
while (client1.GetStatus(tag) == Libplctag.PLCTAG_STATUS_PENDING)
{
Thread.Sleep(100);
}
//if (client1.GetStatus(tag) != Libplctag.PLCTAG_STATUS_OK)
//{
// //Console.WriteLine($"Error setting up tag internal state. Error{ client.DecodeError(client.GetStatus(tag))}\n");
// MessageBox.Show($"Error setting up tag internal state. Error{client1.DecodeError(client1.GetStatus(tag))}\n");
// return;
//}

var result = client1.ReadTag(tag, DataTimeout);

// Check the read operation result
if (result != Libplctag.PLCTAG_STATUS_OK)
{
Console.WriteLine($"ERROR: Unable to read the data! Got error code {result}: {client1.DecodeError(result)}\n");
return;
}
// Convert the data
var TestDintArray0 = client1.GetInt32Value(tag, 0 * tag.ElementSize);
}
}
finally
{
MessageBox.Show("Hello");
}
}

How would you rate your experience with us?

Best Regards,

Brajesh Kumar Srivastava

Technical Manager Software

M: +91 8800334819

W: www.barcodeindia.com

To view this discussion visit https://groups.google.com/d/msgid/libplctag/8da667c8-8078-451e-b9b0-63d1c767339dn%40googlegroups.com.

Kyle

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Dec 2, 2024, 11:39:41 PM12/2/24

to libplctag

There are a couple problems with that code.

- you are using SLC as the PLC type. A CompactLogix is not an SLC. Use CompactLogix or ControlLogix if that is really what you have.

- I do not have a CompactLogix on which to test, but I think the path needs to be "0,0" instead of "1,0". I am not sure though.

Double check the PLC type.

Best,

Kyle

Pete Huish

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Dec 3, 2024, 12:06:40 AM12/3/24

to libplctag

In our setup accessing several ControlLogix PLCs path "1,0" works

Brajesh Srivastava

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Dec 3, 2024, 12:19:21 AM12/3/24

to Kyle, libplctag

I have checked with CompacLogix and Control Logix as well but not working

To view this discussion visit https://groups.google.com/d/msgid/libplctag/09e5c83a-8c10-47e0-9ea1-753546e2faedn%40googlegroups.com.

Kyle

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Dec 3, 2024, 12:23:02 AM12/3/24

to libplctag

ControlLogix need the path as the CPU module could be in any slot. CompactLogix does not have a movable CPU so the path is not really needed but in testing I did a long time ago (more than ten years) I found that 0,0 worked.

Brajesh, please turn on debugging to level 4 and capture the log output and post it here. The error just means a timeout. There are a number of possible causes for that. The usual ones do not seem to be a problem so we'll have to dig more. We need to see what is happening within the library to determine where the problem is.

Best,

Kyle