Hi Andrew,
I get:
epics> dbpvar PIP2IT-HPRF-SSR1-SSA2-00:OFP:ControlPVs 4
PVA links in record named 'PIP2IT-HPRF-SSR1-SSA2-00:OFP:ControlPVs'
P:S12OFP conn=F 0 disconnects, 0 type changes,
provider 'pva'
0/1 channels connected used by 1 links
Cheers,
Pierrick
On 4/23/21 4:31 PM, Johnson, Andrew N. wrote:
> Hi Pierrick,
>
> Does the iocsh ‘dbpvar’ command tell you anything interesting/useful about the state of the pva link? You can give it a record name, or “*”, and an integer level for more and more detail about the link(s).
>
> - Andrew
>
> On Apr 23, 2021, at 4:10 PM, Pierrick M Hanlet via Tech-talk <tech-talk at aps.anl.gov> wrote:
>> Hi all,
>> I'm running v7.0.3.1 on an SL7.8 machine. I'm using structured data, with a sub-structure
>> called Control. I know that the structure/sub-structure is being properly set by testing it
>> with a pvmonitor:
>> pvmonitor -r Control P:S12OFP
>> which yields:
>> P:S12OFP structure
>> structure Control
>> time_t timeStamp <undefined>
>> long secondsPastEpoch 0
>> int nanoseconds 0
>> int userTag 0
>> short value 8
>>
>> I want this Control value to populate another record which has the form:
>> record(longin,"PIP2IT-HPRF-SSR1-SSA2-00:OFP:ControlPVs") {
>> field(DESC,"Trigger Control PVs from acnet device")
>> field(SCAN,"Passive")
>> field(INP,{pva:{pv:"P:S12OFP",
>> field:"Control.value",
>> proc:"CP"}})
>> field(FLNK,"PIP2IT-HPRF-SSR1-SSA2-00:OFP:SetPVs.PROC")
>> }
>>
>> However, this value doesn't change despite its input value changing. Furthermore,
>> if I attempt to change it's value with:
>> caput PIP2IT-HPRF-SSR1-SSA2-00:OFP:ControlPVs
>> then get the error:
>> Old : PIP2IT-HPRF-SSR1-SSA2-00:OFP:ControlPVs 0
>> CA.Client.Exception...............................................
>> Warning: "Channel write request failed"
>> Context: "op=1, channel=PIP2IT-HPRF-SSR1-SSA2-00:OFP:ControlPVs, type=DBR_STRING, count=1, ctx="PIP2IT-HPRF-SSR1-SSA2-00:OFP:ControlPVs""
>> Source File: ../oldChannelNotify.cpp line 160
>> New : PIP2IT-HPRF-SSR1-SSA2-00:OFP:ControlPVs 0
>> Current Time: Fri Apr 23 2021 15:45:03.687389769
>>
>> Thank you,
>> Pierrick
>>
>> --
>> Pierrick Hanlet
>> Fermi National Accelerator
>> Accelerator Front End Controls
>> +1-630-840-5555 -- lab
>> +1-312-687-4980 -- mobile
>>
>> "Whether you think you can or think you can't, you're right" -- Henry Ford
>>
--
Pierrick Hanlet
Fermi National Accelerator
Accelerator Front End Controls
+1-630-840-5555 -- lab
+1-312-687-4980 -- mobile
"Whether you think you can or think you can't, you're right" -- Henry Ford
- Replies:
- Re: pvdata structure not writing to other pvs Michael Davidsaver via Tech-talk
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