Hi Marco,
If I can't misundestand you, you can set a default value by using code on htmpl files (WSP code)
if insert a new record (insert time)
var strDefault = "abcd";
if ("$args.id" == "0" && _dtl.edit)
document.main_form.elements["SET.zEnter"].value = strDefault;
run the code on body onload event
or if trigger this action by url, you can define PRESET parameter in url code like following sample
$CAisd/pdmweb.exe?OP=CREATE_NEW+FACTORY=cr+PRESET=zEnter:abcd+.....
Regards,
Türker