Re: PV value logging

[Vikram Bhagat <vbhagat@rocketmail.com>]

Hi Ralph,

--What do you want to log?    I want to log value with Timestamp. My record scanning rate is 1 Second and i want to log at same rate. I also have some PV having I/O Intr. in that case at the time of value change.   

For outputs:  Value change by operator.  and want to log the changed value with time.

-- How long do you want to log? (just during a test setup? over long periods? forever?)   It should be log value it IOC run.  we can say forever.

-- What do you want to do with the information? (use it for debugging? create plots of values over time?)   - it can be used for analysis and create plots.

-- Where do you want to log? (local on IOC console? remote on a different, maybe central, server?)   locally may be in some file etc.

Thank you very much.

---

From: Ralph Lange <Ralph.Lange@gmx.de>
To: Vikram Bhagat <vbhagat@rocketmail.com>
Cc: EPICS Tech Talk <tech-talk@aps.anl.gov>
Sent: Friday, May 17, 2013 1:42 PM
Subject: Re: PV value logging

On Fri May 17 2013 11:22:27 GMT+0200 (CEST), Vikram Bhagat <vbhagat@rocketmail.com> wrote:

Hi,

      How i can enable logging of EPICS PV value?  For example logging input PV (record type ai or bi)  and even set PV (record type ao or bo) also.   

I have used Asyn driver for my application.

Thanks

The answer depends on:

- What do you want to log? (value? timestamp? alarm status? For outputs: also who changed it? from where? old and new value?)
- How long do you want to log? (just during a test setup? over long periods? forever?)
- What do you want to do with the information? (use it for debugging? create plots of values over time?)
- Where do you want to log? (local on IOC console? remote on a different, maybe central, server?)

If you supply a more complete specification of your request, people will be able to point you to the best solution.

Thanks,
~Ralph