Re: Oxford Cryostream 1000 IOC questions

[Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>]

Hi James,

• 2026/08/13 18:20:47.498515 _main_ OXCRYO:CS1000:TURBOCMD lockRequest: port OC_CMD not connected

That looks to me like the Oxford rejected the connection attempt for the second socket.

Here are a couple of ways to diagnose:

1. Just before iocInit add this command:

asynReport 1

That will show the status of all asyn port drivers, including whether they are connected.

2. After the IOC is running type the following command from another Linux shell:

telnet 164.54.212.121 10304

Does it let you connect, or does it reject the connection attempt?  If it rejects then it would seem the Oxford is only allowing one socket client at a time on that port.  That is not consistent with the original database and startup script design.  Perhaps there is a configuration setting on the Oxford to allow more than one socket connection?

Mark

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From: James P. Withrow <jwithrow at cornell.edu>
Sent: Thursday, August 13, 2026 6:34 PM
To: Mark Rivers <rivers at cars.uchicago.edu>; tech-talk <tech-talk at aps.anl.gov>
Subject: Re: Oxford Cryostream 1000 IOC questions

Hello Mark -

Below is the relevant excerpt from the IOC when both the status and command sockets are set to the same IP and port as in the repository.

# CS1000 uses TCP for Status Packets or Commands
# Status Packets
drvAsynIPPortConfigure("L0", "164.54.212.121:10304 TCP", 0, 0, 0)
# Commands
drvAsynIPPortConfigure("OC_CMD", "164.54.212.121:10304 TCP", 0, 0, 0)
# Status Packet and Commands on a Single Port
dbLoadRecords("db/MDO.db", "P=OXCRYO:,Q=CS1000,PORT=L0,R=MDO:,L=0,A=0,PORTCMD=OC_CMD")
#var mySubDebug 1
#var streamError 1
#var streamDebug 1
#If are interested in saving logs, it can produce a few GBs of logs, use with caution
#streamSetLogfile("logfile.txt")
cd "/opt/epics/iocs/cryostream-1000-EPICS-IOC/OXCS1000/iocBoot/ioccryo1"
iocInit
Starting iocInit
############################################################################
## EPICS R7.0.9
## Rev. 2026-01-14T12:49-0600
## Rev. Date build date/time: 
############################################################################
2026/08/13 18:20:47.498515 _main_ OXCRYO:CS1000:TURBOCMD lockRequest: port OC_CMD not connected

-Jim

Jim Withrow, Research Support Specialist - jwithrow at cornell.edu

NE-CAT, Cornell University - https://necat.chem.cornell.edu

Advanced Photon Source, Sector 24

9700 S. Cass Avenue, Building 436 E001

Lemont, IL 60439

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From: Mark Rivers <rivers at cars.uchicago.edu>
Sent: Thursday, August 13, 2026 5:07 PM
To: tech-talk <tech-talk at aps.anl.gov>; James P. Withrow <jwithrow at cornell.edu>
Subject: Re: Oxford Cryostream 1000 IOC questions

 

Hi Jim,

I think the database was probably intentionally designed to open 2 separate sockets to the device, so that the long status reply and short commands were independent.

Can you send the error message you got when using 2 separate asyn ports?

Mark

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From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of James P. Withrow via Tech-talk <tech-talk at aps.anl.gov>
Sent: Thursday, August 13, 2026 4:02 PM
To: tech-talk <tech-talk at aps.anl.gov>
Subject: Oxford Cryostream 1000 IOC questions

 

Good afternoon, all - 

I have an Oxford Cryostream 1000 and I am attempting to use the IOC located at 

https://github.com/bcsblbl/cryostream-1000-EPICS-IOC

I have it working well; I am able to both control and monitor the cryostream. However, my IOC console fills up with the following messages at 1-second intervals:

2026/08/13 15:55:18.027546 L0 OXCRYO:CS1000:STATUS: device L0 0 disconnected

2026/08/13 15:55:19.179502 L0 OXCRYO:CS1000:STATUS: device L0 0 disconnected

2026/08/13 15:55:20.331536 L0 OXCRYO:CS1000:STATUS: device L0 0 disconnected

2026/08/13 15:55:21.483524 L0 OXCRYO:CS1000:STATUS: device L0 0 disconnected

2026/08/13 15:55:22.635480 L0 OXCRYO:CS1000:STATUS: device L0 0 disconnected

Have I configured something incorrectly? Is this something to be concerned with? I did change the following line in st.cmd:

dbLoadRecords("db/MDO.db", "P=OXCRYO:,Q=CS1000,PORT=L0,R=MDO:,L=0,A=0,PORTCMD=L0")

I changed PORTCMD from "OC_CMD" to "LO" as both the drvAsynIPPortConfigure lines referenced the same IP and port, and the IOC complained about not being able to get a lock for the second port.

Thank you, 

-Jim Withrow

Jim Withrow, Research Support Specialist - jwithrow at cornell.edu

NE-CAT, Cornell University - https://necat.chem.cornell.edu

Advanced Photon Source, Sector 24

9700 S. Cass Avenue, Building 436 E001

Lemont, IL 60439