UTGARD how to write struct to opc item ?

[Aron Lau]

Hi,

anyone know how to write struct to opc server using utgard?

i can red struct from opc server and get array of unsinedbyte and decode it as struct,

but i write struct as  item value is failed.

struct {

  UINT a;

  UINT b;

  UINT c;

  UINT d;

  UINT e;

}

UINT  : 2 byte  width 

total size of this struct is 10 bytes

code like this:

Byte[] bytes = new Byte[]{0x01,0x00,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
JIArray v = new JIArray(bytes,true);
value = new JIVariant(v);
int code = item.write(value);

return code = 2147352571   i checked, that means datatype not match.

[Jens Reimann]

A Byte is 8bit. So if you want two byte (16bit) the Short type would be the correct one. However I think that jinterop also has some JUnsignedShort type. But would have to look this up myself.

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[Aron Lau]

i have tried Short[] , failed code same as array of Byte. 

 i can read this struct, return Type is JIArray of JIUsignedByte, so  i try to send 10 bytes as struct.  but it not work.   

in jinterop UnsignedShort is not Public.

在 2015年11月4日星期三 UTC+8下午2:41:03，Jens Reimann写道：

[Jens Reimann]

I just checked:

JIUnsignedShort and JIUnsignedByte are both public classes. However they do have a non-public constructor.

However in the same package, beside the JIUnsigned* classes is the JIUnsignedFactory, which will create JIUnsigned instances for you.

Maybe this helps.

Jens

[Aron Lau]

thanks for you reply, it helps.

i will try it tomorrow.

在 2015年11月4日星期三 UTC+8下午10:04:12，Jens Reimann写道：