CCRs: display diagnostic data from compressors

[Tom-Willemsen]

As a cryogenics support person, I would like to be able to monitor the diagnostic data reported by compressors connected to CCRs on various beamlines.

Currently, we do not talk to the compressors on most beamlines. Having the diagnostic data available would reduce the diagnosis time for cryogenics problems during cycle. Cryogenics have mentioned two models of compressor they are interested in:

• Sumitomo
• Cryomech

These compressors apparently do have a serial interface, but it is not usually in use at the moment.

Acceptance criteria:

• Meeting with cryogenics group held to make sure we have captured all requirements and models of compressor which they would like us to support. Ensure this meeting is written up and the minutes placed somewhere accessible.
• Appropriate tickets created for implementing any compressors we don't already have support for

Notes:

• There are some compressors involved in HiFi's cryomagnet, we should check whether they are the same make & model as some of the others we're being asked to control
• Cryogenics are initially interested in read-only monitoring of diagnostic data from the compressors, not control
• Cryogenics contact: Chris L

[KathrynBaker]

The HIFI compressors are Cryomech ones, PT415s specifically. These are only monitored by the system. Control aspects were explicitly removed, although MICE who developed the original IOC did have some I believe.

Some technical items we will need to consider in the later tickets are whether this is via instrument PCs – note that this would then mean a compressor could be running but if the IBEX server isn’t running then there would be no feedback, or a central service such as with the detector monitoring. What levels of monitoring and reporting are required. Data storage and duration of historical data. Depending on some of these answers we have an infrastructure consideration as well. Therefore there is more than just making sure we can talk to the compressors to be thought about, and to ask the cryogenics team, so I would recommend altering the acceptance criteria to be “Appropriate tickets created for implementing the requirements noted from the meeting”

[FreddieAkeroyd]

Sumitomo f-70 water cooled compressors have been discussed on tech talk and an ioc + opi look to exist. Serial comms is only supported at certain firmware levels (1.6 and above), so those need checking on device itself
https://epics.anl.gov/tech-talk/2017/msg00583.php http://www.shicryogenics.com/products/compressors/f-70-indoor-water-cooled-compressor-series/ https://polarize.dk/wp-content/uploads/2019/12/267472A-F-70-Operating-Manual-Rev02.pdf

[FreddieAkeroyd]

Chris Lawson has identified 12 F70 compressors that have current firmware, 4 of which have an obvious data connection point available nearby

[FreddieAkeroyd]

Now have copy of IOC and OPI from ORNL

[FreddieAkeroyd]

Files added at https://github.com/ISISComputingGroup/Sumitomo_F70

serial parameters look to be

DB9 3 wire pins 2/3/5 for receive/transmit/ground
Baud: 9600
Parity: None
Data bits: 8
Stop bits: 1

It mentions a standard pinout male connector, but is unclear if this is what is required to connect or is provided by the device. Either way, it would appear a NULL modem is not required if the moxa cable has the correct gender.