Experimental Physics and
Industrial Control System

Torsten Bögershausen via Tech-talk <tech-talk at aps.anl.gov> · Tue, 16 Nov 2021 18:15:44 +0100

Hej Mark and Heinz,

If I command the motor to -10 mm,
and it runs into the limit switch at -2.970

The we see that .VAL stays at -10 mm, (where the motor should have gone)
and .RBV is -2.970 (where the motor is)

So the “correlation” is lost - on purpose.
Thats my understanding.

HTH
/Torsten

> On 16 Nov 2021, at 18:09, Mark L Rivers via Tech-talk <tech-talk at aps.anl.gov> wrote:
> 
> Hi Heinz,
> 
> It looks like you are using an encoder (UEIP=Yes), and your encoder readback (REP) is 0.  When the motor record hits a limit switch I believe it sets the DVAL to the readback value.
> 
> Mark
> 
> 
> From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Heinz Junkes via Tech-talk <tech-talk at aps.anl.gov>
> Sent: Tuesday, November 16, 2021 10:59 AM
> To: EPICS Tech Talk <tech-talk at aps.anl.gov>
> Subject: Understanding Motor Record
>  
> I am having problems with Motor-Record right now.
> I am using Epics 7 and the latest MotorRecord
> (master: https://github.com/epics-modules/motor)
> 
> When I reach a Limit - Switch, then there is no
> correlation between RMP and DVAL/VAL anymore?
> 
> RMP : 1361 vs. DVAL: 0 and VAL : 0 ??
> 
> I'm using the same hardware as I have for 10 years (Oms MAXv), only 
> now I have Epics7 with the new motor-record in use.
> 
> I also have the feeling that something with the conversion of the
> EGU and the direction etc. does not fit.
> But unfortunately can not specify yet because "somehow some is wrong”
> 
> Danke Heinz
> 
> > dbpr FHIFEL:M11PH,10
> ACCL: 1             ACKS: NO_ALARM      ACKT: YES           ADEL: 0
> ALST: 0             ASG :               ASP : PTR 0x0       ATHM: 0
> BACC: 1             BDST: 0             BKLNK: ELL 0 [0x0 .. 0x0]
> BKPT: 00            BVEL: 4.5           CARD: 0             CBAK: PTR 0x15f9bf8
> CDIR: 1             CNEN: Disable       DCOF: 0
> DESC: M1 Pinhole OMS_Z                  DHLM: 140           DIFF: 0
> DINP: CONSTANT      DIR : Pos           DISA: 0             DISP: 0
> DISS: NO_ALARM      DISV: 1             DLLM: -140          DLY : 0
> DMOV: 1             DOL : CONSTANT      DPVT: PTR 0x15f9c18 DRBV: 0
> DSET: PTR 0x462d34  DTYP: OMS MAXv      DVAL: 0             EGU : mm
> ERES: 1.171875e-04  EVNT:               FLNK: CONSTANT      FOF : 0
> FOFF: Frozen        FRAC: 1             HHSV: NO_ALARM      HIGH: 0
> HIHI: 0             HLM : 140           HLS : 1             HLSV: NO_ALARM
> HOMF: 0             HOMR: 0             HOPR: 0             HSV : NO_ALARM
> HVEL: 4.5           ICOF: 0             IGSET: 0            INIT:
> JAR : 7.5           JOGF: 0             JOGR: 0             JVEL: 4.5
> LCNT: 0             LDVL: 0             LLM : -140          LLS : 0
> LLSV: NO_ALARM      LOCK: NO            LOLO: 0             LOPR: 0
> LOW : 0             LRLV: 0             LRVL: 0             LSET: PTR 0x1548258
> LSPG: Go            LSV : NO_ALARM      LVAL: 0             LVIO: 0
> MDEL: 0             MIP : 0             MISS: 1
> MLIS: ELL 148 [0x2190a58 .. 0x177254c8] MLOK: 01 54 f4 10   MLST: 0
> MMAP: 0             MOVN: 0             MRES: 1.171875e-04  MSTA: 7
> NAME: FHIFEL:M11PH  NMAP: 0             NSEV: NO_ALARM      NSTA: NO_ALARM
> NTM : YES           NTMF: 2             OFF : 0             OMSL: supervisory
> OUT : VME_IO #C0 S2 @                   PACT: 0             PCOF: 0
> PHAS: 0             PINI: NO            POST:               PP  : 0
> PPN : PTR 0x0       PPNR: PTR 0x0       PREC: 3             PREM:
> PRIO: LOW           PROC: 0             PUTF: 0             RBV : 0
> RCNT: 0             RDBD: 0.1           RDBL: CONSTANT      RDES: PTR 0xcbd400
> RDIF: 0             REP : 0             RHLS: 1             RINP: CONSTANT
> RLLS: 0             RLNK: CONSTANT      RLV : 0             RMOD: Default
> RMP : 1361          RPRO: 0             RRBV: 0             RRES: 999.99
> RSET: PTR 0x462f4c  RSTM: NearZero      RTRY: 5             RVAL: 0
> RVEL: 0             S   : 5             SBAK: 3             SBAS: 3
> SCAN: Passive       SDIS: CONSTANT      SET : Use           SEVR: NO_ALARM
> SMAX: 12            SPDB: 0             SPMG: Go            SPVT: PTR 0x0
> SREV: 12800         SSET: 0             STAT: NO_ALARM      STOO: CONSTANT
> STOP: 0             STUP: OFF           SUSE: 0             SYNC: 0
> TDIR: 1             TIME: 2021-11-16 16:45:24.834573822     TPRO: 0
> TSE : 0             TSEL: CONSTANT      TWF : 0             TWR : 0
> TWV : 1             UDF : 0             UDFS: INVALID       UEIP: Yes
> UREV: 1.5           URIP: No            VAL : 0             VBAS: 4.5
> VELO: 7.5           VERS: 7.2           VMAX: 18            VOF : 0

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System