Common features

DAQ epicsArch - Archived Data

You can add/remove any data you want in the epicsArchive data group readout.

The path is /cds/group/pcds/dist/pds/tmo/misc/

The tmo file we use is epicsArch_tmo.txt. Let's look at two features of this

Adding a single variable to the file

Add a comment with a #

# Power meter at IM2K4

Add a pointer name of your choosing with *

*IM2K4_XrayPower

For the LCLS2 DAQ, you should also specify which protocol is used to access the PV:

Add the pv name specifying whether it is read using channel access (ca), or pv access (pva) at the end

IM2K4:PPM:SPM:VOLT_RBV ca

For the LCLS1 DAQ, you only list the PV

IM2K4:PPM:SPM:VOLT_RBV

Add a whole file with a bunch of variables

You can made file with a subset of PVs, give it a meaningful name like epicsArch_vmi.txt for all the vmi variables to record. You can then reference that file with '<' in the main file as below.

# MPOD/VMI information

< epicsArch_vmi.txt

LCLS2 DAQ

LCLS-II Data Acquisition and Analysis

LCLS1 DAQ

Online Analysis Tutorial (AMI) - presented at 2014 SSR/LCLS Users Meeting: LCLS Data Analysis Workshop

DAQ Overview and Online Analysis - presented at 2010 SSRL/LCLS Users Meeting : LCLS Data Analysis Workshop
Online Analysis Design - Matt's presentation for Jan 2012 DAQ Meeting