EPICS EVR HowTo

The information below can also be found in the event module README file at our CVS site

...

------------------------------------------------------
At the top of most of the timing db files you will find an edl file listed that
is associated with that db file. Here are the standard ones, the macros that
should be passed to each, and how to define those macros.

Trigger settings
Db file: *trig.db
EDL file: evnt_trig_*.edl to match hardware (PMC/VME, with/without transition board variations) evnt_trig_PMC_TTB.edl  evnt_trig_PMC_noTTB.edl evnt_trig_VME_TTB.edl  evnt_trig_VME_noTTB.edl
Macros: DEV, LOCA, UNIT, IOC, SYS
Macros are the same ones used with *trig.db. The default value for DEV is
TRIG:$(LOCA):$(UNIT). If the triggers in your EVR don't all have the same prefix
(TRIG:LOCA:UNIT or DEV), you can't use this screen. Copy the appropriate screen
and customize PV names, or use the display autogen approach.

The following will have all macros derived from the trigger screen macros when
launched from trigger screen using the "Experts" button:
evrPatternDiags.edl (Pattern.db)
evrDiags.edl (EvrPmc.db)
evrTriggerDiags.edl (EvrPmc.db)

BSA diagnostics
Db file: Bsa.db
EDL file: evnt_bsa_dev_edefs.edl
Macros:
DEV_BASE - the BSA data source prefix, e.g. BPMS:IN10:371, TRIG:B34:EV05
BSA - the name of the edef specific screen, e.g. evnt_bsa_dev, evnt_bsa_llrf...
The other macros depend on the screen specified as $(BSA). These are for evnt_bsa_dev:
DEV - prefix for the data source, generally $(DEV_BASE):
SECN - part of PV name defined as SECN, ATTR, or ATRB in the bsa db file, e.g. COUNTER
SYS - SYS0 etc.

...

----------------------------------------------------

Please, remove both macros TEC (Trigger Event Code Name) and ACTV (Activate Event Code Invariant Delay)
from your trig.substitution file. (there is no more trigger event code name.
The forward/backward propagation and event code invariant delay is a default mode)

IOC engineer engineers need to put new macro SYS to describe the beam program in the trig.substitution file.substitutions and evr.substitutions files

Please, follow the following rule.

SYS=SYS0: LCLS
SYS=SYS1: FACET
SYS=SYS2: LCLS II
SYS=SYS6: NLCTA

Note)
If you really want to disable the event code invariant delay,
you can put ACTV macro and set it to ZERO.
Then the feature will be disabled. The intrinsic delay (EVG delay)
will be set to 13004 as a default.
If you want to change the default value, you can use TEC macro.
Please, put your default instrinsic delay value for the TEC macro.

...