John, Patrick, Richard The EPICS state code that controls the enabling and disabling of the cold cathode gauges was not installed for the gauges that got added to HAM1 and HAM6 (PT100 and PT110). However, the on/off toggle buttons on the medm screens for these gauges were writing to the state code request channels. This is why toggling these buttons had no effect. I updated the H0VE_LX_Y0.adl and H0VE_LY_X0.adl medm screens to use the channels that output directly to hardware instead of the state code request channels: request channel hardware channel HVE-LY:X0_HSCCONOFF -> HVE-LY:X0_HS100 HVE-LX:Y0_HSCCONOFF -> HVE-LX:Y0_HS110