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PDESPhase offset (degrees) used by LLRF to convert measured phase to one relative to operation, adjusted (gold beam phasing.  How to use:
  • Find maximum energy by adjusting PDES
  • Set PREF to
    R/WNameDescription

    SRF Example

    (CM 2 Cavity 1)

    Gun/Buncher Example
    R/WRFMODECTRLRF mode control (SEL, SELA, SELAP, SEL Raw, Pulse, Chirp) ACCL:L1B:0210:RFMODECTRL N/A
    RRFMODEReadback of current RF mode (SEL, SELA, SELAP, SEL Raw, Pulse, Chirp, Tone) ACCL:L1B:0210:RFMODE
    R/WRFCTRLCavity on/off control. Off = LLRF drive set to 0. (SSA control will be different.) ACCL:L1B:0210:RFCTRL
    RRFSTATEReadback of cavity RF on/off state ACCL:L1B:0210:RFSTATE

     N/A

    RRFREADYFORBEAM

    Indicates cavity is in an okay state for beam operation. Possible states:

    Ready (numerical 1) = cavity RF is On and mode is SELAP

    Not ready (numerical 0) = Ready criteria not met

    ACCL:L1B:0210:RFREADYFORBEAM
    R/WADES

    Operation amplitude setpoint (MV)

    (For SRF, this setting is used in SEL, SELA, SELAP modes.)

     ACCL:L1B:0210:ADES
    RGDESGradient setpoint (MV/m) - readback only ACCL:L1B:0210:GDES N/A
    RSEL_ASETSRF amplitude setpoint in SEL Raw, Pulse, Chirp modes. Is in units of % of full drive scale. ACCL:L1B:0210:SEL_ASET N/A
    RAACTMEANMeasured amplitude from cavity probe (MV), averaged over LLRF waveform. Identical to CAV:AMEAN. Typically averaged over ~350 ms, but this can vary depending on waveform settings.
     ACCL:L1B:0210:AACTMEAN
    RGACTMEANMeasured gradient from cavity probe (MV/m), averaged over LLRF waveform. Typically averaged over ~350 ms, but this can vary depending on waveform settings.
     ACCL:L1B:0210:GACTMEAN
    RADES_MAX

    Maximum allowable amplitude (MV). Minimum of SRF, RF, and Ops limits (below).

     ACCL:L1B:0210:ADES_MAX
    R/WADES_MAX_SRF

    SRF maximum allowable amplitude, set by SRF experts (MV)

     ACCL:L1B:0210:ADES_MAX_SRF
    R/WADES_MAX_RFRF maximum allowable amplitude, set by RF experts  (MV) ACCL:L1B:0210:ADES_MAX_RF
    R/WADES_MAX_OPSOps maximum allowable amplitude, set by Operations experts (MV) ACCL:L1B:0210:ADES_MAX_OPS
    R/WOperation phase setpoint (degrees, where 0 is on-crest by convention). Range -180 to 180.
     ACCL:L1B:0210:PDESRPACTMEANMeasured phase from cavity probe (degrees), averaged over LLRF waveform. Identical to CAV:PMEAN. Typically averaged over ~350 ms, but this can vary depending on waveform settings. ACCL:L1B:0210:PACTMEAN
    R/WPREFPDESOperation phase setpoint (degrees, where 0 is on-crest by convention). Range -180 to 180. ACCL:L1B:0210:PDES
    WGOLD_PDES

    'Golds' PDES. It will cause PREF to be updated and leave PDES at zero. How to use:

    1. Find maximum energy by adjusting PDES
    2. Set GOLD_PDES to 1

    Doing so will cause:

    a. PREF to be set to

    (PREF-PDES)

    b. PDES will then be set to 0



    R/WPREF

    Phase offset (degrees) used by LLRF to convert measured phase to one relative to on-crest operation, adjusted by (gold) beam phasing. Recommend not setting PREF directly, but using GOLD_PDES (above).

    (no cavity phase change will occur)Set PDES to 0 (no cavity phase change will occur)

    PREF is subtracted from PDES before writing phase to hardware. PREF is added to the raw phase readback from hardware.

     ACCL:L1B:0210:PREF
    R/WPTOF

    Phase offset (degrees) used to adjust for changes in beam time-of-arrival, in particular for changes in bunch compressor path length. Unlike PREF, changing PTOF will immediately change the cavity phase. 

    PTOF is subtracted from PDES before writing phase to hardware. PTOF is added to the raw phase readback from hardware.

    ACCL:L1B:0210:PTOF
    R/WSEL_POFFSEL phase offset setpoint ACCL:L1B:0210:SEL_POFF N/A
    RSEL_POFF_RBVSEL phase offset readback ACCL:L1B:0210:SEL_POFF_RBV N/A
    RDFACTMeasured detune frequency (Hz)N/A
    RDFMeasured detune frequency (Hz) using state space equation, cavity and forward signals - used to drive piezos ACCL:L1B:0210:DF N/A
    RDFVALIDMeasured detune frequency (Hz) using state space equation, cavity and forward signals is valid. If it is not valid, its value cannot be used and the resonance system will not automatically change the piezo setting. In order for it to be valid, there must be sufficient cavity signal and it must be within +/- a couple hundred Hz. ACCL:L1B:0210:DFVALID N/A
    RDF_FCMeasured detune frequency (Hz) using frequency counter method -  not used in resonance control, larger operating range than DF ACCL:L1B:0210:DF_FC N/A
    RCHIRP:DFMeasured detune frequency (Hz) using chirp method -  only active in Chirp and Pulsed modes, primarily for use when cavity is many kHz out of tune, operating range of tens of kHz or more ACCL:L1B:0210:CHIRP:DF N/A
    R/WALEMLEM computed integrated RF amplitude (MV) per cavity and per cryomodule ACCL:L1B:0210:ALEM
    R/WPLEMLEM computed phase (deg) ACCL:L1B:0210:PLEM
    R/WEGLEMLEM computed energy gain (MeV) ACCL:L1B:0210:EGLEM
    R/WCHLEMLEM computed chirp (MeV) ACCL:L1B:0210:CHLEM
    R/WCAV:FUDGE

    Beam-based scale factor applied to cavity probe amplitude readback. Nominal value of 1.

    CAV:SCALE = cavity_preliminary_scaling * CAV:FUDGE

    CAV:SCALE is applied at the waveform level and so FUDGE is included in scalars like AACT, CAV:AMEAN, CAV:AMIN, CAV:AMAX, etc. and waveforms like CAV:IWF, CAV:QWF, CAV:AWF, etc.

     ACCL:L1B:0210:CAV:FUDGE
    RCavity design length - constant ACCL:L1B:0210:L N/A
    RFREQCavity design frequency - constant ACCL:L1B:0210:FREQ N/A
    RIMPEDCavity design shunt impedance - constant ACCL:L1B:0210:IMPED N/A
    RPWRDISSCavity dissipated power (W). Calculated by LLRF from Q0 and cavity amplitude. Sent by LLRF to cryo controls.ACCL:L1B:0210:PWRDISS
    RQ0Cavity Q0 (unitless), including user fudge factor. This is the value used by HaLO, LLRF calculation of dissipated power, etc. Formula: Q0 = Q0:MEAS * Q0:FUDGEACCL:L1B:0210:Q0
    R/WQ0:MEASLast measured cavity Q0 (unitless)ACCL:L1B:0210:Q0:MEAS
    R/WQ0:FUDGECavity Q0 fudge factor (unitless). Nominal value of 1. Can be used to adjust Q0 if suspect actual Q0 is not Q0:MEAS, for example due to recent quench.ACCL:L1B:0210:Q0:FUDGE
    SRF Interlocks - Per Cavity
     WINTLK_RESET_ALL Reset all latched faults from RFS and Resonance/Interlock chassisACCL:L1B:0210:INTLK_RESET_ALL
     RRFS:INTLK_FIRST Bit mask indicating which interlock fault was first detected by RFS.ACCL:L1B:0210:RFS:INTLK_FIRST N/A
     RRFS:FLTINTLK_FIRST For last captured fault waveform, bit mask indicating which interlock fault was first detected by RFSACCL:L1B:0210:RFS:FLTINTLK_FIRST N/A
    RQUENCH_FLT


    Cavity quench fault, from RFS chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

    ACCL:L1B:0210:QUENCH_FLT
    RQUENCH_LTCHACCL:L1B:0210:QUENCH_LTCH
    WQUENCH_BYPACCL:L1B:0210:QUENCH_BYP
    RQUENCH_BYP_RBVACCL:L1B:0210:QUENCH_BYP_RBV
    RQUENCH_CNTTACCL:L1B:0210:QUENCH_CNTT
    RQUENCH_CNTYACCL:L1B:0210:QUENCH_CNTY
    RQUENCH_CNTACCL:L1B:0210:QUENCH_CNT
    RQUENCH_CNTUACCL:L1B:0210:QUENCH_CNTU
    RSTEPTEMP_FLT

        

    Stepper temperature fault, from Interlock chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

    ACCL:L1B:0210:STEPTEMP_FLT
    RSTEPTEMP_LTCHACCL:L1B:0210:STEPTEMP_LTCH
    WSTEPTEMP_BYP ACCL:L1B:0210:STEPTEMP_BYP
    RSTEPTEMP_BYP_RBVACCL:L1B:0210:STEPTEMP_BYP_RBV
    RSTEPTEMP_CNTTACCL:L1B:0210:STEPTEMP_CNTT
    RSTEPTEMP_CNTYACCL:L1B:0210:STEPTEMP_CNTY
    RSTEPTEMP_CNTACCL:L1B:0210:STEPTEMP_CNT
    RSTEPTEMP_CNTUACCL:L1B:0210:STEPTEMP_CNTU
    RCPLRTEMP1_FLT


    Coupler temperature 1 fault, from Interlock chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

    ACCL:L1B:0210:CPLRTEMP1_FLT
    RCPLRTEMP1_LTCHACCL:L1B:0210:CPLRTEMP1_LTCH
    WCPLRTEMP1_BYP ACCL:L1B:0210:CPLRTEMP1_BYP
    RCPLRTEMP1_BYP_RBV ACCL:L1B:0210:CPLRTEMP1_BYP_RBV
    RCPLRTEMP1_CNTTACCL:L1B:0210:CPLRTEMP1_CNTT
    RCPLRTEMP1_CNTYACCL:L1B:0210:CPLRTEMP1_CNTY
    RCPLRTEMP1_CNTACCL:L1B:0210:CPLRTEMP1_CNT
    RCPLRTEMP1_CNTUACCL:L1B:0210:CPLRTEMP1_CNTU
    RCPLRTEMP2_FLT


    Coupler temperature 2 fault, from Interlock chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

        
    ACCL:L1B:0210:CPLRTEMP2_FLT
    RCPLRTEMP2_LTCHACCL:L1B:0210:CPLRTEMP2_LTCH
    WCPLRTEMP2_BYPACCL:L1B:0210:CPLRTEMP2_BYP
    RCPLRTEMP2_BYP_RBVACCL:L1B:0210:CPLRTEMP2_BYP_RBV
    RCPLRTEMP2_CNTTACCL:L1B:0210:CPLRTEMP2_CNTT
    RCPLRTEMP2_CNTYACCL:L1B:0210:CPLRTEMP2_CNTY
    RCPLRTEMP2_CNTACCL:L1B:0210:CPLRTEMP2_CNT
    RCPLRTEMP2_CNTUACCL:L1B:0210:CPLRTEMP2_CNTU
    RPLL_FLT

    FPGA PLL lock fault, from RFS chassis. Current status, latched status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults. Cannot be bypassed.    

    ACCL:L1B:0210:PLL_FLT
    RPLL_LTCH ACCL:L1B:0210:PLL_LTCH
    RPLL_CNTTACCL:L1B:0210:PLL_CNTT
    RPLL_CNTYACCL:L1B:0210:PLL_CNTY
    RPLL_CNTACCL:L1B:0210:PLL_CNT
    RPLL_CNTUACCL:L1B:0210:PLL_CNTU
    RIOCWDOG_FLT


    EPICS IOC watchdog fault, from RFS chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

    ACCL:L1B:0210:IOCWDOG_FLT
    IOCWDOG_LTCH ACCL:L1B:0210:IOCWDOG_FLT
    IOCWDOG_BYP ACCL:L1B:0210:IOCWDOG_BYP
    IOCWDOG_BYP_RBV ACCL:L1B:0210:IOCWDOG_BYP_RBV 
    RIOCWDOG_CNTTACCL:L1B:0210:IOCWDOG_CNTT
    RIOCWDOG_CNTYACCL:L1B:0210:IOCWDOG_CNTY
    RIOCWDOG_CNTACCL:L1B:0210:IOCWDOG_CNT
    RIOCWDOG_CNTUACCL:L1B:0210:IOCWDOG_CNTT
    RSSA_FLT


    SSA permit fault, from RFS chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

    ACCL:L1B:0210:SSA_FLT
    SSA_LTCH ACCL:L1B:0210:SSA_LTCH
    SSA_BYP ACCL:L1B:0210:SSA_BYP
    SSA_BYP_RBV ACCL:L1B:0210:SSA_BYP_RBV
    RSSA_CNTTACCL:L1B:0210:SSA_CNTT
    RSSA_CNTYACCL:L1B:0210:SSA_CNTY
    RSSA_CNTACCL:L1B:0210:SSA_CNT
    RSSA_CNTUACCL:L1B:0210:SSA_CNTU
    SRF Interlocks - Per Rack (A or B)

    RCPLRVAC[A,B]_FLT

       


    Coupler vacuum fault, from Interlock chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

        
    ACCL:L1B:0200:CPLRVACA_FLT
    RCPLRVAC[A,B]_LTCHACCL:L1B:0200:CPLRVACA_LTCH
    WCPLRVAC[A,B]_BYP ACCL:L1B:0200:CPLRVACA_BYP
    RCPLRVAC[A,B]_BYP_RBV ACCL:L1B:0200:CPLRVACA_BYP_RBV
    RCPLRVAC[A,B]_CNTTACCL:L1B:0200:CPLRVACA_CNTT
    RCPLRVAC[A,B]_CNTYACCL:L1B:0200:CPLRVACA_CNTY
    RCPLRVAC[A,B]_CNTACCL:L1B:0200:CPLRVACA_CNT
    RCPLRVAC[A,B]_CNTUACCL:L1B:0200:CPLRVACA_CNTU
    RBMLNVAC[A,B]_FLT



    Beamline vacuum fault, from Interlock chassis. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

        
    ACCL:L1B:0200:BMLNVACA_FLT
    RBMLNVAC[A,B]_LTCHACCL:L1B:0200:BMLNVACA_LTCH
    WBMLNVAC[A,B]_BYP ACCL:L1B:0200:BMLNVACA_BYP 
    RBMLNVAC[A,B]_BYP_RBV ACCL:L1B:0200:BMLNVACA_BYP_RBV
    RBMLNVAC[A,B]_CNTTACCL:L1B:0200:BMLNVACA_CNTT
    RBMLNVAC[A,B]_CNTYACCL:L1B:0200:BMLNVACA_CNTY
    RBMLNVAC[A,B]_CNTACCL:L1B:0200:BMLNVACA_CNT
    RBMLNVAC[A,B]_CNTUACCL:L1B:0200:BMLNVACA_CNTU

    R

    CRYOSUM[A,B]_FLT



    Cryo summary fault, from local Cryo PLC. Current status, latched status, bypass command, bypass status, counts of today's faults, yesterday's faults, total faults, a resettable counter's faults.

    ACCL:L1B:0200:CRYOSUMA_FLT
    RCRYOSUM[A,B]_LTCHACCL:L1B:0200:CRYOSUMA_LTCH
    WCRYOSUM[A,B]_BYPACCL:L1B:0200:CRYOSUMA_BYP
    RCRYOSUM[A,B]_BYP_RBVACCL:L1B:0200:CRYOSUMA_BYP_RBV
    RCRYOSUM[A,B]_CNTTACCL:L1B:0200:CRYOSUMA_CNTT
    RCRYOSUM[A,B]_CNTYACCL:L1B:0200:CRYOSUMA_CNTY
    RCRYOSUM[A,B]_CNTACCL:L1B:0200:CRYOSUMA_CNT
    RCRYOSUM[A,B]_CNTUACCL:L1B:0200:CRYOSUMA_CNTU
       SRF Interlocks - Per Cryomodule - Tentative

     RCRYOSUM_FLT Cryo summary status from local Cryo PLC. Current status ACCL:L1B:0200:CRYOSUM_FLT 
     RHELEVEL_FLT Cryo Helium level status from local Cryo PLC. Current status ACCL:L1B:0200:HELEVEL_FLT
     RHEPRES_FLT Cryo Helium pressure status from local Cryo PLC. Current status ACCL:L1B:0200:HEPRES_FLT
     RCRYOHEARTBEAT_FLT Cryo PLC heartbeat fault. Generated by RF software when cryo data stops updating or updates too slowly ACCL:L1B:0200:CRYOPLC_HEARTBEAT
       SRF Cavity Characterization and Expert Settings
    RQLOADEDLoaded QACCL:L1B:0210:QLOADED
    RLDCOEFLorentz detuning coefficientACCL:L1B:0210:LDCOEF
    RBCOEFMState space B coefficient magnitudeACCL:L1B:0210:BCOEFM
    RBCOEFPState space B coefficient phaseACCL:L1B:0210:BCOEFP
    RSSA:SLOPESSA curve parameter - slopeACCL:L1B:0210:SSA:SLOPE
    RSSA:PEDSSA curve parameter - pedestalACCL:L1B:0210:SSA:PED
    RSSA:MINXSSA curve parameter - min x ACCL:L1B:0210:SSA:MINX
    RSSA:DRV_MAXMaximum drive to SSA, range 0 to 1. Do not change this directly. It is set by SSA calibration script.ACCL:L1B:0210:DRV_MAX
         
      Waveform Signals

    Each SRF cavity has the following waveform signals:

    Description PV name, <SIG> in following sectionAmplitude Units Power Units Phase Units
    Forward Power FWDsqrt(W) Wdegrees 
    Reverse/Reflected Power REVsqrt(W)  Wdegrees 
    Cavity Probe CAVMV mWdegrees 
    DAC (FPGA internal, input to DAC that drives SSA) DAC% of full DAC scale (% of full DAC scale)^2degrees 
    Detune (see below) DFHz  N/A N/A
    Drive (RFS chassis loopback) - waveform disabled by defaultDRVsqrt(W)Wdegrees

    For SRF systems, these PVs are provided for CAV, FWD, REV, DAC (and DRV only during expert diagnostics/troubleshooting.) Example PVs are for CAV.

     <SIG>:AWF Signal amplitude waveformACCL:L1B:0210:CAV:AWF
    R <SIG>:AMEAN Mean of <SIG>:AWFACCL:L1B:0210:CAV:AMEAN
    R <SIG>:ASTD Standard deviation of <SIG>:AWFACCL:L1B:0210:CAV:ASTD
    R <SIG>:ARSTD Standard deviation of <SIG>:AWF divided by mean of <SIG>:AWFACCL:L1B:0210:CAV:ARSTD 
    R <SIG>:AMIN Minimum of <SIG>:AWFACCL:L1B:0210:CAV:AMIN
    R <SIG>:AMAX Maximum of <SIG>:AWFACCL:L1B:0210:CAV:AWF 
     R <SIG>:PWF Signal phase waveformACCL:L1B:0210:CAV:PWF
     R <SIG>:PMEAN Mean of <SIG>:PWFACCL:L1B:0210:CAV:PMEAN 
    R <SIG>:PSTD Standard deviation of <SIG>:PWFACCL:L1B:0210:CAV:PSTD 
     <SIG>:PRSTD Standard deviation of <SIG>:PWF divided by mean of <SIG>:PWFACCL:L1B:0210:CAV:PRSTD  
    R <SIG>:PMIN Minimum of <SIG>:PWFACCL:L1B:0210:CAV:PMIN
    R <SIG>:PMAX Maximum of <SIG>:PWFACCL:L1B:0210:CAV:PMAX
    R <SIG>:PWRWF Signal power waveformACCL:L1B:0210:CAV:PWRWF
    R <SIG>:PWRMEAN Mean of <SIG>:PWRWFACCL:L1B:0210:CAV:PWRMEAN
    R <SIG>:PWRSTD Standard deviation of <SIG>:PWRWFACCL:L1B:0210:CAV:PWRSTD 
    R <SIG>:PWRRSTD Standard deviation of <SIG>:PWRWF divided by mean of <SIG>:PWRWFACCL:L1B:0210:CAV:PWRRSTD
    R <SIG>:PWRMIN Minimum of <SIG>:PWRWFACCL:L1B:0210:CAV:PWRMIN
    R <SIG>:PWRMAX Maximum of <SIG>:PWRWFACCL:L1B:0210:CAV:PWRMAX
    R <SIG>:IWF Signal I waveformACCL:L1B:0210:CAV:IWF
     <SIG>:QWF Signal Q waveformACCL:L1B:0210:CAV:AWF
    R <SIG>:FLTAWF Fault waveform - signal amplitudeACCL:L1B:0210:CAV:FLTAWF
    R <SIG>:FLTPWF Fault waveform - signal phaseACCL:L1B:0210:CAV:FLTPWF
    Other SRF Waveform Signals:     
    RDF:WF Detune frequency waveform. Calculated by software from cavity and forward signals. [Hz]ACCL:L1B:0210:DF:WF
    RDF:MEANMean of DF:WFACCL:L1B:0210:DF:MEAN
    RDF:STD Standard deviation of DF:WFACCL:L1B:0210:DF:STD 
    RDF:MINMinimum of DF:WFACCL:L1B:0210:DF:MIN 
    DF:MAX Maximum of DF:WFACCL:L1B:0210:DF:MAX 
    RBW:WF Cavity bandwidth waveform. Calculated by software from cavity and forward signals.  [Hz]ACCL:L1B:0210:BW:WF 
    RCTRL:IWFP/I Controller Output I waveform. Calculated by software from cavity and DAC signals. [% of full scale, range -1 to 1]ACCL:L1B:0210:CTRL:IWF 
    CTRL:QWF P/I Controller Output Q waveform. Calculated by software from cavity and DAC signals. [% of full scale, range -1 to 1] ACCL:L1B:0210:CTRL:QWF  
    CTRL:AWF P/I Controller Output amplitude waveform. Calculated by software from cavity and DAC signals. [% of full scale, range -1 to 1] ACCL:L1B:0210:CTRL:AWF  
    RCTRL:FLTAWFFault waveform - P/I Controller Output amplitudeACCL:L1B:0210:CTRL:FLTAWF
    RCTRL:FLTPWFFault waveform - P/I Controller Output phaseACCL:L1B:0210:CTRL:FLTPWF
    R/WACQ_FLT_DELAYFault data trigger control. In % of total waveform data duration. 0% = all data is pre-fault, 100% = all data is post-faultACCL:L1B:0210:ACQ_FLT_DELAY
         
    Feedback     
     AMPFB_GAIN_P_RBV Amplitude feedback proportional gain readback (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_P_RBV
    R/W AMPFB_GAIN_P Amplitude feedback proportional gain setting (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_P 
     AMPFB_GAIN_I_RBV Amplitude feedback integral gain readback (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_I_RBV
    R/W AMPFB_GAIN_I Amplitude feedback integral gain setting (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_I 
     PHAFB_GAIN_P_RBV Phase feedback proportional gain readback (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_P_RBV
    R/W PHAFB_GAIN_P Phase feedback proportional gain setting (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_P 
     PHAFB_GAIN_I_RBV Phase feedback integral gain readback (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_I_RBV
    R/W PHAFB_GAIN_I Phase feedback integral gain setting (units not yet determined)ACCL:L1B:0210:AMPFB_GAIN_I 
     AMPFB_LSUM Amplitude feedback is at lower limit while feedback is active. 0 if true (alarm state), 1 if false (good state)ACCL:L1B:0210:AMPFB_LSUM 
    AMPFB_HSUM Amplitude feedback is at upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)ACCL:L1B:0210:AMPFB_HSUM 
    AMPFB_SUM Amplitude feedback is at either lower or upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)ACCL:L1B:0210:AMPFB_SUM 
    PHAFB_LSUM Phase feedback is at lower limit while feedback is active. 0 if true (alarm state), 1 if false (good state)ACCL:L1B:0210:PHAFB_LSUM 
    PHAFB_HSUM Phase feedback is at upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)ACCL:L1B:0210:PHAFB_HSUM 
    RPHAFB_SUMPhase feedback is at either lower or upper limit while feedback is active. 0 if true (alarm state), 1 if false (good state)ACCL:L1B:0210:PHAFB_SUM
    RFB_SUMAmplitude or phase feedback is at either lower or upper limit while RFREADYFORBEAM is active. 0 if true (alarm state), 1 if false (good state). This summary's counts of today's faults, yesterday's faults, total faults, a resettable counter faults.ACCL:L1B:0210:FB_SUM
    RFB_SUM_CNTTACCL:L1B:0210:FB_SUM_CNTT
    RFB_SUM_CNTYACCL:L1B:0210:FB_SUM_CNTY
    RFB_SUM_CNTACCL:L1B:0210:FB_SUM_CNT
    RFB_SUM_CNTUACCL:L1B:0210:FB_SUM_CNTU

    ...