def _printCtrlConf(self):
        """ get PV value and print out
        """
        if self.ctrlinfo:
            print("Control configs:")
            for k, v in sorted(self.ctrlinfo.items(), reverse=True):
                pv = v['pv']
                rval = epics.caget(pv)
                if rval is None:
                    val = ''
                else:
                    val = self.unitTrans(rval, direction='+')
                print("  {k:6s} = {pv:6s}, raw: {rval:>6s}, real: {val:>6s}".format(k=str(k),
                                                                                    pv=str(pv),
                                                                                    rval=str(rval),
                                                                                    val=str(val)))
get PV value and print out