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<== Date ==> <== Thread ==>

Subject: Re: Timestamp for EtherIP input records
From: "Kasemir, Kay" <kasemirk@ornl.gov>
To: Hovanes Egiyan <hovanes.egiyan@gmail.com>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Mon, 4 May 2015 15:14:03 +0000
Hi:

The IOC assigns the time stamp.

When you check the output of 
  drvEtherIP_report 10
you'll see the min/max/last scan time, i.e. the round-trip time from sending the read request to the PLC to receiving the data, but that time is not used to adjust the record time stamps.

Thanks,
-Kay

On May 4, 2015, at 10:21 AM, Hovanes Egiyan <hovanes.egiyan@gmail.com>
 wrote:

> Hello Kay,
> 
> We use EtherIP support module to interface Allen-Bradley ControlLogix PLC with EPICS.
> We are trying to understand a sequence of certain events recorded in our EPICS archiver,
> and it would be useful for us to know if the EtherIP driver preserves the timestamp from
> the PLC for ai, bi, longin records, or the record timestamps are the times when the IOC
> processed these input records.
> 
> Thanks in advance,
>          Hovanes Egiyan.
> 



References:
Timestamp for EtherIP input records Hovanes Egiyan

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