docs: def set_state(self, hdr):
          """Read CSU information and slits from header"""
  
          self.conf_f = hdr.get('CSUCONFF', 'UNKNOWN')
          # Read CSUPOS and set position in model
          # The bars
          for idx in self.bars:
              key = "CSUP{}".format(idx)
              # UNIT is mm
  
              # set CSUPOS for BAR
              # Using the model, this sets the X,Y coordinate
              self.bars[idx].csupos = hdr[key]
  
          self._update_slits(hdr)