Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Wed, 30 May 2012 15:23:17 -0500

On 5/30/12 2:21 PM, Tim Mooney wrote:
> Lewis,
> This is just bizarre.  I don't see this problem on a roughly comparable VME system.  I'm stumped and flailing.
> Two things that I haven't seen proof of so far are that the calc record actually is processing, and that the "=" operator works.
> Could you set 17lab:ClcBacklightBi.TPRO to 1, and also try "a<>1?0:1".

Hi, Tim.

With 17lab:ClcBacklightBi.TPRO set to 1, every time I do a caput
to 17lab:Unidig1Bi1.VAL, I get this on the console:

17lab IOC console >>>
scanOnce: Process 17lab:ClcBacklightBi
<<<

When I set CALC to "a<>1?0:1", I get the following on the console:

17lab IOC console >>>
Illegal field value PV: 17lab:ClcBacklightBi calc: Illegal CALC
field

17lab:ClcBacklightBi.CALC: Syntax error, unknown
operator/operand in expression "A<>1?0:1"
<<<

Instead I tried "A!=1?0:1" and "A#1?0:1" which both work correctly.

> Could you try a calcout record, so you can check the CLCV field?

The calcout record has the same problem and CLCV is 0.

Thanks,

Lewis

> ----- Original Message -----
> From: "J. Lewis Muir" <[email protected]>
> To: "EPICS Tech Talk" <[email protected]>
> Sent: Tuesday, May 29, 2012 10:09:53 PM
> Subject: calc VAL field not updating from bi VAL field
> 
> I've got a problem where a calc record's VAL field is not
> updating when I expect it to.
> 
> I load the following database into my IOC:
> 
> calc-bi.db >>>
> record(bi, "$(P)Unidig1Bi1") {
>   field(ZNAM, "Low")
>   field(ONAM, "High")
> }
> 
> record(calc, "$(P)ClcBacklightBi") {
>   field(INPA, "$(P)Unidig1Bi1.VAL CP MS")
>   field(CALC, "A=1?1:0")
> }
> <<<
> 
> like this:
> 
> st.cmd >>>
> ...
> dbLoadRecords("calc-bi.db","P=17lab:")
> ...
> <<<
> 
> I then start camonitor:
> 
> camonitor console >>>
> $ camonitor 17lab:ClcBacklightBi.VAL 17lab:ClcBacklightBi.A
> 17lab:ClcBacklightBi.VAL       2012-05-29 19:48:44.845452 1 LINK
> INVALID
> 17lab:ClcBacklightBi.A         2012-05-29 19:48:44.845452 0 LINK
> INVALID
> <<<
> 
> And then I perform a series of caput commands in another console:
> 
> caput console >>>
> $ caput 17lab:Unidig1Bi1.VAL 0
> Old : 17lab:Unidig1Bi1.VAL           Low
> New : 17lab:Unidig1Bi1.VAL           Low
> $ caput 17lab:Unidig1Bi1.VAL 1
> Old : 17lab:Unidig1Bi1.VAL           Low
> New : 17lab:Unidig1Bi1.VAL           High
> $ caput 17lab:Unidig1Bi1.VAL 0
> Old : 17lab:Unidig1Bi1.VAL           High
> New : 17lab:Unidig1Bi1.VAL           Low
> $ caput 17lab:Unidig1Bi1.VAL 1
> Old : 17lab:Unidig1Bi1.VAL           Low
> New : 17lab:Unidig1Bi1.VAL           High
> <<<
> 
> camonitor shows the following:
> 
> camonitor console >>>
> 17lab:ClcBacklightBi.VAL       2012-05-29 21:11:28.307312 1
> 17lab:ClcBacklightBi.A         2012-05-29 21:11:28.307312 0
> 17lab:ClcBacklightBi.A         2012-05-29 21:11:33.423978 1
> 17lab:ClcBacklightBi.A         2012-05-29 21:11:36.990645 0
> 17lab:ClcBacklightBi.A         2012-05-29 21:12:32.507352 1
> <<<
> 
> As you can see, the 17lab:ClcBacklightBi record's VAL field
> updates once when the record first processes and then never
> again.  The "A" field is updating correctly as I change
> 17lab:Unidig1Bi1.VAL, but 17lab:ClcBacklightBi.VAL never updates
> again.
> 
> If I change the CALC expression to "A", the VAL field updates
> correctly.  If I change it back, it stops working again.
> 
> Environment:
> * VME processor module: Motorola MVME-2100 (vxWorks-ppc603)
>   - CPU: MPC 8240
>   - Memory: 32 MB
> * OS: VxWorks 5.5.2
> * Kernel: WIND 2.6
> * BSP: mv2100-asd5 (by Andrew Johnson)
> * Build toolchain: Tornado 2.2.2
> * EPICS 3.14.12.2 (+Known Problems patches)
> 
> I tried this on darwin-x86 (x86_64) and it did not fail, so to
> date it is only failing for me on my VME systems.  (I initially
> discovered the problem on an MVME-5100.)
> 
> This worked fine with older software (i.e. VxWorks 5.4.2 with
> EPICS 3.14.11) on my VME systems.
> 
> Thanks,
> 
> Lewis
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System