MicroLogix 1400 : plc_tag_create return PLCTAG_ERR_BAD_PARAM

[DamienPim]

Hello, I can't get libplctag to work with MicroLogix 1400. I use libplctag 1.5.2 and libplctag.NativeImport in a VS2022 C# project. I call plc_tag_create with following UniqueKey: "protocol=ab_eip&gateway=192.168.0.98&cpu=MicroLogix&elem_size=1&elem_count=1&name=Bit_1" but I get PLCTAG_ERR_BAD_PARAM error. For cpu, I see that I can use MicroLogix because in get_plc_type, stricmp is used to compare cputypes... Can anyone help me? Has anyone tried libplctag with a MicroLogix 1400 ? Thank you in advance.

[timyhac]

Searching existing issues for "MicroLogix 1400" yields that someone has had some success already: https://github.com/search?q=repo%3Alibplctag%2Flibplctag.NET+micrologix+1400&type=issues

Can you please turn on debugging to level 4, and provide other information such as a code snippet of what you have tried, and let us know if you have been able to get something working, even if it isn't the final result you're looking for.

Unpacking what you are saying:

• Your application is a C# .NET Core application (which framework version?)
• Both the libplctag package (v1.5.2) and the libplctag.NativeImport package (only as a transitive reference? If not, which version?) have been added to the application.
• Within your code you have a call to plc_tag_create and you pass in an attribute string of "protocol=ab_eip&gateway=192.168.0.98&cpu=MicroLogix&elem_size=1&elem_count=1&name=Bit_1".
• You want to be able to write cpu=MicroLogix instead of cpu=micrologix.

I note the attribute string doesn't specify the path, is that correct?

[DamienPim]

I don't specify path because I see that it is not used for MicroLogix PLC. I write MicroLogix and not micrologix because I see a case insensitive comparison. Both the libplctag package (v1.5.2) and the libplctag.NativeImport package (v1.0.41) have been added to the application. C# .Net Framework 4.6.2. Tests on Windows 10. The MicroLogix1400 on which I can make tests will be no longer available after this afternoon. I have to find another MicroLogix PLC to continue my tests... Thank again for your help.

[kyle-github]

name=Bit_1 is not a valid DF1/PCCC data file reference. B42:0/1 is.

That said, the debug file will help a lot.

[DamienPim]

The MicroLogix1400 on which I can make tests is no longer available. I have find another MicroLogix but I don't yet received it. I will come back with results ASAP.

[timyhac]

G'day @DamienPim - were you able to get the debug logs in the end?

[DamienPim]

Unfortunately, the MicroLogix I received didn't include an Ethernet port so I couldn't do the test... And I didn't find another MicroLogix. Sorry....

[kyle-github]

For Micrologix you need to use the D1/PCCC data file names. N7:0. B3:2/1 etc. I have a Micrologix 1100 with Ethernet and it works. I know, I know, "works for me" is not that helpful :-/

[timyhac]

@DamienPim - thanks for the response, if you do encounter further issues with libplctag or libplctag.NET in the future please don't hesitate to reach out to the community.