Experimental Physics and
Industrial Control System

Mark Rivers via Tech-talk <tech-talk at aps.anl.gov> · Wed, 8 Sep 2021 12:02:14 +0000

Hi Zongyang,

You are getting this error right after iocInit():

PV: prj:epid1:outpv scanAdd: I/O Intr not valid (no DSET)

That is a known bug: https://github.com/epics-modules/optics/issues/10

The sseq record (and probably the swait record) does not support SCAN=I/O Intr.  I suggest you delete all of the lines like the following in fb_epid.db
(https://github.com/epics-modules/optics/blame/master/opticsApp/Db/fb_epid.db):

field(SCAN, "I/O Intr")

I don't understand how this database ever worked, but perhaps older versions of EPICS base did not catch this error.

Mark

________________________________
From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of 岳宗仰 via Tech-talk <tech-talk at aps.anl.gov>
Sent: Wednesday, September 8, 2021 2:34 AM
To: tech-talk at aps.anl.gov
Subject: problems about epid

Hello, all
I am learning to EPID record.
Following this guide, I meet some trouble
https://epics.anl.gov/bcda/synApps/optics/fb_epid/simulator.html
My iocInit shell as follow:
--------------
< envPaths
epicsEnvSet("IOC","iocepid_test")
epicsEnvSet("TOP","/home/yuezy/epid_test")
epicsEnvSet("EPICS_BASE","/opt/epics/base")
epicsEnvSet("SUPPORT","/opt/epics/support")
epicsEnvSet("OPTICS","/opt/epics/support/optics")
epicsEnvSet("STD","/opt/epics/support/std")
epicsEnvSet("asyn","/opt/epics/support/asyn")
epicsEnvSet("calc","/opt/epics/support/calc")
epicsEnvSet("SNCSEQ","/opt/epics/support/seq")
epicsEnvSet("busy","/opt/epics/support/busy")
epicsEnvSet("AUTOSAVE","/opt/epics/support/autosave")
epicsEnvSet("DEVIOCSTATS","/opt/epics/support/iocStats")
cd "/home/yuezy/epid_test"
## Register all support components
dbLoadDatabase "dbd/epid_test.dbd"
epid_test_registerRecordDeviceDriver pdbbase
## Load record instances
dbLoadRecords("db/fb_epid.db","P=prj:epid1,IN=prj:epid1:sim.VAL,OUT=prj:epid1:sim.D,MODE=PID,CALC=A,PERMIT1="prj:epid1:on.VAL",PERMIT2="",PERMIT3="",PERMIT4=""")
iocInit
Starting iocInit
############################################################################
## EPICS R7.0.3.1
## EPICS Base built Jul 21 2021
############################################################################
recDynLinkOut: waiting for CA context
PV: prj:epid1:outpv scanAdd: I/O Intr not valid (no DSET)

recDynLinkOut: got CA context
iocRun: All initialization complete
## Start any sequence programs
#seq sncxxx,"user=yuezy"
epics>

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

The Proportional and integral terms have values, but OVAL is always 0

My test result as follow
-------------------
[yuezy@localhost epid_test]$ caget prj:epid1.P
prj:epid1.P                    9.99
[yuezy@localhost epid_test]$ caget prj:epid1.I
prj:epid1.I                    100
[yuezy@localhost epid_test]$ caget prj:epid1.OVAL
prj:epid1.OVAL                 0
-------------------

Any suggestions or comments would be appreciated.

Best regards!

Zongyang yue

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System