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<== Date ==> <== Thread ==>
Subject: Re: devAsynFloat64::processCallbackInput process read error
From: Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>
To: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>, Kritsada Kittimanapun <kritsadak at slri.or.th>
Date: Mon, 26 Feb 2024 13:45:15 +0000
Hi Krtitsada, After running the st. cmd, everything looks fine until "iocRun: All initialization complete", then there is an error message. Actually, you get an error before iocInit as well. It is this. It cannot find your Keller3040. db
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Hi Krtitsada,

  • After running the st.cmd, everything looks fine until "iocRun: All initialization complete", then there is an error message.

Actually, you get an error before iocInit as well.  It is this.  It cannot find your Keller3040.db file.

dbLoadRecords("../../db/Keller3040.db","user=mbsdaq")
filename="../../../src/ioc/dbStatic/dbLexRoutines.c" line number=264
No such file or directory dbRead opening file ../../db/Keller3040.db

In order to understand the devAsynFloat43 errors we need to see the database and substitutions file that defines the records with the errors.

I think your Modbus configuration is also inefficient.  You have defined 6 drvModbusAsyn drivers that all use function code 3 (read holding registers).  Each one reads 2 registers, and the registers are all consecutive in memory (0x0000, 0x0002, etc.).  This is creating 6 threads that are polling the device.  It is much more efficient to just create a single drvModbusAsyn driver that reads 12 registers.  Then your database just defines the addr of each record as 0, 2, 4, 6, 8, 10.

Mark

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Kritsada Kittimanapun via Tech-talk <tech-talk at aps.anl.gov>
Sent: Monday, February 26, 2024 6:25 AM
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: devAsynFloat64::processCallbackInput process read error
 
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This message came from outside your organization.
 
Hello,

After running the st.cmd, everything looks fine until "iocRun: All initialization complete", then there is an error message. I am not sure if it is from the connection of the device which I have already checked or from the file setup. Thank you for your advice.

Kritsada
-----------------------------------------------------------------------------------
land@raspberrypi:~/epics/keller $ ./start.sh  
#!../../bin/linux-x86_64/Keller3040
## You may have to change Keller3040 to something else
## everywhere it appears in this file
< envPaths
epicsEnvSet("IOC","iocKeller3040")
epicsEnvSet("TOP","/home/land/epics/keller")
epicsEnvSet("MODULES","/home/land/epics/modules")
epicsEnvSet("ASYN","/home/land/epics/modules/asyn")
epicsEnvSet("MODBUS","/home/land/epics/modules/modbus")
epicsEnvSet("EPICS_BASE","/home/land/epics/base")
## Register all support components
dbLoadDatabase("../../dbd/Keller3040.dbd",0,0)
Keller3040_registerRecordDeviceDriver(pdbbase)  
## Load record instances
dbLoadRecords("../../db/Keller3040.db","user=mbsdaq")
filename="../../../src/ioc/dbStatic/dbLexRoutines.c" line number=264
No such file or directory dbRead opening file ../../db/Keller3040.db
drvAsynSerialPortConfigure("Keller", "/dev/ttyUSB0", 0, 0, 1)
asynSetOption("Keller", 0, "baud", "9600")
asynSetOption("Keller", 0, "parity", "none")
asynSetOption("Keller", 0, "bits", "8")
asynSetOption("Keller", 0, "stop", "1")
modbusInterposeConfig("Keller", 1, 1000, 0)
# drvModbusAsynConfigure(portName,  
#               tcpPortName,
#               slaveAddress,  
#               modbusFunction,  
#               modbusStartAddress,  
#               modbusLength,
#               dataType,
#               pollMsec,  
#               plcType);
# Calculated value.
drvModbusAsynConfigure("CH0", "Keller", 1, 3, 0x0000, 2, 0, 0, "Keller")
# Pressure sensor 1.
drvModbusAsynConfigure("P1", "Keller", 1, 3, 0x0002, 2, 0, 0, "Keller")
# Pressure sensor 2.
drvModbusAsynConfigure("P2", "Keller", 1, 3, 0x0004, 2, 0, 0, "Keller")
# Temperature.
drvModbusAsynConfigure("T", "Keller", 1, 3, 0x0006, 2, 0, 0, "Keller")
# Temperature sensor 1.
drvModbusAsynConfigure("TOB1", "Keller", 1, 3, 0x0008, 2, 0, 0, "Keller")
# Temperature sensor 2.
drvModbusAsynConfigure("TOB2", "Keller", 1, 3, 0x000a, 2, 0, 0, "Keller")
# drvModbusAsynConfigure("SNH", "Keller", 250, 3, 0x0200, 2, 0, 100, "Keller")
#asynSetTraceMask "Keller",1,0xff
dbLoadTemplate("Keller.substitutions")
iocInit()
Starting iocInit
############################################################################
## EPICS R3.16.1
## EPICS Base built Jul 30 2018
############################################################################
iocRun: All initialization complete
## Start any sequence programs
#seq sncKeller3040,"user=mbsdaq"
epics> 2024/02/26 10:27:29.299 Keller:CH0 devAsynFloat64::processCallbackInput process read error  
2024/02/26 10:27:29.299 Keller:T devAsynFloat64::processCallbackInput process read error  
2024/02/26 10:27:29.300 Keller:P1 devAsynFloat64::processCallbackInput process read error  
2024/02/26 10:27:29.300 Keller:TOB2 devAsynFloat64::processCallbackInput process read error  
2024/02/26 10:27:29.300 Keller:P2 devAsynFloat64::processCallbackInput process read error  
2024/02/26 10:27:29.300 Keller:TOB1 devAsynFloat64::processCallbackInput process read error





References:
devAsynFloat64::processCallbackInput process read error Kritsada Kittimanapun via Tech-talk
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