Experimental Physics and
Industrial Control System

This looks quite familiar to me, see

  https://epics.anl.gov/core-talk/2019/msg00839.php

and the ensuing thread. As mentioned in this thread, there may be a
possible connection to

  https://bugs.launchpad.net/epics-base/+bug/1841634

Cheers
Ben

Am 08.01.20 um 21:11 schrieb Mark Rivers via Tech-talk:
> The question is why was the value from the CP link not up to date, i.e. not reflecting the current value of the link PV.
> 
> Andrew thinks this might be due to a known problem with links in 7.0.3.1.  If so, I think it needs to be fixed ASAP since it is making my IOC behave incorrectly.
> 
> From: Mark Rivers
> Sent: Tuesday, January 7, 2020 6:42 PM
> To: [email protected]
> Subject: CA link question
> 
> Folks,
> 
> I have an IOC that is in a state I have not seen before.  I am trying to understand what it going on.
> 
> This is a calcout record.  INPA and INPB are CP links.
> 
> ioc13ida> dbpr "13IDA:eps_wait89",2
> A   : 0             ACKS: INVALID       ACKT: YES           ADEL: 0
> ASG :               B   : 1             BKPT: 00            C   : 0
> CALC: MAX(A,2*B)    CLCV: 0             D   : 0             DESC: EPS input calc
> DISA: 0             DISP: 0             DISS: NO_ALARM      DISV: 1
> DLYA: 0             DOPT: Use CALC      DTYP: Soft Channel  E   : 0
> EGU :               EVNT:               F   : 0             FLNK: CONSTANT
> G   : 0             H   : 0             HHSV: NO_ALARM      HIGH: 0
> HIHI: 0             HOPR: 0             HSV : NO_ALARM      HYST: 0
> I   : 0             INAV: Ext PV OK     INBV: Ext PV OK     INCV: Constant
> INDV: Constant      INEV: Constant      INFV: Constant      INGV: Constant
> INHV: Constant      INIV: Constant      INJV: Constant      INKV: Constant
> INLV: Constant      INPA: CA_LINK 13IDA:eps_bi89.VAL CP NMS
> INPB: CA_LINK 13IDA:eps_invalid.VAL CP NMS                  INPC: CONSTANT
> INPD: CONSTANT      INPE: CONSTANT      INPF: CONSTANT      INPG: CONSTANT
> INPH: CONSTANT      INPI: CONSTANT      INPJ: CONSTANT      INPK: CONSTANT
> INPL: CONSTANT      IVOA: Continue normally                 IVOV: 0
> J   : 0             K   : 0             L   : 0             LCNT: 0
> LLSV: NO_ALARM      LOLO: 0             LOPR: 0             LOW : 0
> LSV : NO_ALARM      MDEL: 0             NAME: 13IDA:eps_wait89
> NSEV: NO_ALARM      NSTA: NO_ALARM      OCAL: 0             OCLV: 0
> ODLY: 0             OEVT:               OOPT: Every Time
> OUT : DB_LINK 13IDA:eps_mbbi89.VAL PP NMS                   OUTV: Local PV
> OVAL: 2             PACT: 0             PHAS: 0             PINI: NO
> POVL: 2             PREC: 0             PRIO: LOW           PUTF: 0
> PVAL: 2             RPRO: 0             SCAN: Passive       SDIS: CONSTANT
> SEVR: NO_ALARM      STAT: NO_ALARM      TIME: 2020-01-07 23:35:22.701452929
> TPRO: 0             TSE : 0             TSEL: CONSTANT      UDF : 0
> UDFS: INVALID       VAL : 2
> value = 0 = 0x0
> 
> Note that INPB is 13IDA:eps_invalid.VAL CP.  The current value of B is 1.
> 
> This is 13IDA:eps_invalid.  Note that its value is 0.
> 
> ioc13ida> dbpr "13IDA:eps_invalid",2
> A   : 0             ACKS: INVALID       ACKT: YES           ADEL: 0
> ASG :               B   : 1             BKPT: 00            C   : 0
> CALC: (A#0)||(B=0)||(C#0)||(D#0)        CLCV: 0             D   : 0
> DESC: EPS invalid calculation           DISA: 0             DISP: 0
> DISS: NO_ALARM      DISV: 1             DLYA: 0             DOPT: Use CALC
> DTYP: Soft Channel  E   : 0             EGU :               EVNT:
> F   : 0             FLNK: CONSTANT      G   : 0             H   : 0
> HHSV: NO_ALARM      HIGH: 0             HIHI: 0             HOPR: 0
> HSV : NO_ALARM      HYST: 0             I   : 0             INAV: Ext PV OK
> INBV: Ext PV OK     INCV: Ext PV OK     INDV: Ext PV OK     INEV: Constant
> INFV: Constant      INGV: Constant      INHV: Constant      INIV: Constant
> INJV: Constant      INKV: Constant      INLV: Constant
> INPA: CA_LINK 13IDA:eps_bi1.SEVR CP NMS INPB: CA_LINK 13IDA:eps_bi1.VAL CP NMS
> INPC: CA_LINK 13IDA:eps_bi2.VAL CP NMS  INPD: CA_LINK 13IDA:eps_bi11.VAL CP NMS
> INPE: CONSTANT      INPF: CONSTANT      INPG: CONSTANT      INPH: CONSTANT
> INPI: CONSTANT      INPJ: CONSTANT      INPK: CONSTANT      INPL: CONSTANT
> IVOA: Continue normally                 IVOV: 0             J   : 0
> K   : 0             L   : 0             LCNT: 0             LLSV: NO_ALARM
> LOLO: 0             LOPR: 0             LOW : 0             LSV : NO_ALARM
> MDEL: 0             NAME: 13IDA:eps_invalid                 NSEV: NO_ALARM
> NSTA: NO_ALARM      OCAL: 0             OCLV: 0             ODLY: 0
> OEVT:               OOPT: Every Time    OUT : CONSTANT      OUTV: Constant
> OVAL: 0             PACT: 0             PHAS: 0             PINI: NO
> POVL: 0             PREC: 0             PRIO: LOW           PUTF: 0
> PVAL: 0             RPRO: 0             SCAN: Passive       SDIS: CONSTANT
> SEVR: NO_ALARM      STAT: NO_ALARM      TIME: 2020-01-08 00:35:15.769533950
> TPRO: 0             TSE : 0             TSEL: CONSTANT      UDF : 0
> UDFS: INVALID       VAL : 0
> 
> My questions:
> 
> -   Why is 13IDA:eps_wait89.B 2 if it gets its value from a record whose value is 0, and uses the CP link attribute?
> 
> -   If I force 13IDA:eps_wait89 to process with dbtr should it fetch the value of 13IDA:eps_invalid?  It does not seem to, B is still 1.
> 
> ioc13ida> dbtr "13IDA:eps_wait89"
> A   : 0             ACKS: INVALID       ACKT: YES           ADEL: 0
> ALST: 2             ASG :               B   : 1             BKPT: 00
> C   : 0             CALC: MAX(A,2*B)    CLCV: 0             D   : 0
> DESC: EPS input calc                    DISA: 0             DISP: 0
> DISS: NO_ALARM      DISV: 1             DLYA: 0             DOPT: Use CALC
> DTYP: Soft Channel  E   : 0             EGU :               EVNT:
> F   : 0             FLNK: CONSTANT      G   : 0             H   : 0
> HHSV: NO_ALARM      HIGH: 0             HIHI: 0             HOPR: 0
> HSV : NO_ALARM      HYST: 0             I   : 0             INAV: Ext PV OK
> INBV: Ext PV OK     INCV: Constant      INDV: Constant      INEV: Constant
> INFV: Constant      INGV: Constant      INHV: Constant      INIV: Constant
> INJV: Constant      INKV: Constant      INLV: Constant
> INPA: CA_LINK 13IDA:eps_bi89.VAL CP NMS
> INPB: CA_LINK 13IDA:eps_invalid.VAL CP NMS                  INPC: CONSTANT
> INPD: CONSTANT      INPE: CONSTANT      INPF: CONSTANT      INPG: CONSTANT
> INPH: CONSTANT      INPI: CONSTANT      INPJ: CONSTANT      INPK: CONSTANT
> INPL: CONSTANT      IVOA: Continue normally                 IVOV: 0
> J   : 0             K   : 0             L   : 0             LA  : 0
> LALM: 2             LB  : 1             LC  : 0             LCNT: 0
> LD  : 0             LE  : 0             LF  : 0             LG  : 0
> LH  : 0             LI  : 0             LJ  : 0             LK  : 0
> LL  : 0             LLSV: NO_ALARM      LOLO: 0             LOPR: 0
> LOW : 0             LSV : NO_ALARM      MDEL: 0             MLST: 2
> NAME: 13IDA:eps_wait89                  NSEV: NO_ALARM      NSTA: NO_ALARM
> OCAL: 0             OCLV: 0             ODLY: 0             OEVT:
> OOPT: Every Time    OUT : DB_LINK 13IDA:eps_mbbi89.VAL PP NMS
> OUTV: Local PV      OVAL: 2             PACT: 0             PHAS: 0
> PINI: NO            POVL: 2             PREC: 0             PRIO: LOW
> PROC: 1             PUTF: 0             PVAL: 2             RPRO: 0
> SCAN: Passive       SDIS: CONSTANT      SEVR: NO_ALARM      STAT: NO_ALARM
> TIME: 2020-01-08 00:38:43.652867248     TPRO: 0             TSE : 0
> TSEL: CONSTANT      UDF : 0             UDFS: INVALID       VAL : 2
> value = 0 = 0x0
> 
> Thanks,
> Mark
> 
> 

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CA link question Mark Rivers via Tech-talk

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