Explicit read of a device ERROR Status register

Spider

Trying to read a device parameter using explicit message through devicenet.

<clip from eds file>======================

   Param35=
 0,                              $ parameter value slot
 6, "20 64 24 23 30 01",         $ link path size and path
 0x30,                           $ descriptor: monitor parameter, read only
 0xC4, 4,                        $ type is DINT, length is 4 byte
 "ERR_STAT",                     $ parameter name
 "",                             $ units string
 "",                             $ help string
 -2147483648, 2147483647, 0,     $ min, max, default
 1, 1, 1, 0,                     $ mult, div, base, offset scaling
 0, 0, 0, 0, 0 ;                 $ scaling links and precision
=====================================

<so I tried this>========================

PROC AA()
 var string atSET:="10";
 var string atGET:="0E";
 var rawbytes rb;
 var iodev dev;
 !PackDNHeader atget,"0,6,20 64 24 23 30 01,30,C4,4",rb;
 !PackDNHeader atget,"0,6,20 64 24 23 30 01,C4,4",rb;
 !PackDNHeader atget,"0,6,20 64 24 23 30 01",rb;
 PackDNHeader atget,"20 64 24 23 30 01",rb;
 Open "/FCI1:" File:="S_JVL1", dev Bin;
 WriteRawBytes dev,rbNoOfBytes:=RawBytesLen(rb);
 ClearRawBytes rb;
 ReadRawBytes dev,rb;
 Close dev;
 UnpackRawBytes rb,1,dn intx:=-4;
 pdn:=dn;
 error
 skipwarn;trynext;
ENDPROC
====================================

*now I'm frustrated...*