Experimental Physics and
Industrial Control System

Hinko Kocevar <[email protected]> · Thu, 04 Jun 2009 08:37:12 +0200

Hi Lewis,

J. Lewis Muir wrote:
> On 6/3/09 8:23 AM, Hinko Kocevar wrote:
>> Steven M. Hartman wrote:
>>> Hinko Kocevar wrote:
>>>> Hello,
>>>>
>>>> I'm trying to use subArray record type to display each array element at
>>>> index 0 .. n (n == 10; my case) in a separate PV.
>>>>
>>> For your subArray records, use . . .
>>>
>>>   field(MALM,"16") # number of elements of the waveform input
>>>   field(NELM,"1")  # number elements for desired subArray
>>>
>>> The subArray needs to allocate enough storage for MALM elements to  hold
>>> the whole INP waveform, but you only want NELM elements for the subArray
>>> itself.
>>>
>> If I change subArray records the way you described it does not change
>> the output of the monitor to display only one value. The output is the
>> same as in the case I've described in previous mail (not desired to have
>> trailing zeros).
> 
> Hi, Hinko.
> 
> I agree with Steven's advice that you should use MALM=16 for your
> subArray records.
> 
> What version of EPICS are you using?  There is a known problem with the
> subArray record before EPICS 3.14.10.  Could you check the value of
> "$(DEVICE)B.INDX" during your test?  Has it been set to 0 even though
> you specified a value of 1?  If so, you may be running into the problem
> reported in the following Tech-Talk message:
> 

I'm using EPICS 3.4.10 version.

The properties for LIBERA01:SA:B is shown below:
epics> dbpr LIBERA01:SA:B
ASG:                BUSY: 0             DESC:               DISA: 0

DISP: 0             DISV: 1             INDX: 1             NAME:
LIBERA01:SA:B
NELM: 1             NORD: 1             SEVR: NO_ALARM      STAT:
NO_ALARM
TPRO: 0             VAL: (nil)

I also looked at the other LIBERA01:SA:C, LIBERA01:SA:D, .. and the INDX
value is not 0 - for c it is 2, for D it is 3, .. This seems OK.

epics> dbpr LIBERA01:SA:C
ASG:                BUSY: 0             DESC:               DISA: 0

DISP: 0             DISV: 1             INDX: 2             NAME:
LIBERA01:SA:C
NELM: 1             NORD: 1             SEVR: NO_ALARM      STAT:
NO_ALARM
TPRO: 0             VAL: (nil)

Regards,
Hinko

-- 
Hinko Kocevar
Technical support engineer
Instrumentation Technologies
Velika pot 22, SI-5250 Solkan - Slovenia
T:+386 5 3352600, F:+386 5 3352601
mailto: [email protected]

http://www.i-tech.si - When your users demand stability

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System