libplctag.NativeImport

libplctag.NativeImport

libplctag.NativeImport provides low-level (raw) access to the libplctag core library which is written in C. The purpose of this package is to expose the API for this library to .NET applications, and handle platform and configuration issues.

NOTE: Most application developers will not need to directly reference the Native Import library, it is primarily for use by other wrapper libraries.

Example

var tagHandle = plctag.plc_tag_create("protocol=ab_eip&gateway=10.10.10.10&path=1,0&plc=LGX&elem_size=4&elem_count=1&name=PROGRAM:SomeProgram.SomeDINT", 5000);

var statusAfterCreate = (STATUS_CODES)plctag.plc_tag_status(tagHandle);
if (statusAfterCreate != STATUS_CODES.PLCTAG_STATUS_OK)
{
    throw new Exception($"Something went wrong: {statusAfterCreate}");
}

var statusAfterRead = (STATUS_CODES)plctag.plc_tag_read(tagHandle, 5000);
if (statusAfterRead != STATUS_CODES.PLCTAG_STATUS_OK)
{
    throw new Exception($"Something went wrong: {statusAfterRead}");
}

var theValue = plctag.plc_tag_get_uint32(tagHandle, 0);

Console.WriteLine(theValue);

plctag.plc_tag_destroy(tagHandle);

Further examples can be found here.

How it works

The libplctag core library can be compiled for many platforms, and not all supported platforms are shipped with this wrapper. If you get a TypeLoadException, chances are that you can still use this wrapper but you will need to supply the core libplctag library yourself.