I took the c1teststand computer from teststand and converted it into c1susaux2. To do so, I installed a fresh copy of debian 10 on it and followed the steps on this wiki page. I did some parts slightly differently though. The directory /cvs/cds/caltecg/c1susaux2 is a repository and contains the service unit file modbusIOC.service as well. A symbolic link is created at /etc/systemd/system to use this service file for creating the modbusIOC service. All db files are generated by parsing the acromag chassis wiring file using this python script.

The service file is running without any errors now and all channels are available. The leftmost bench on EEshop at 40m is now ready to do LO1 slow controls and monitor testing. If someone gets time today, they can hookup an unused coil driver to the chassis and verify ENABLE switching and monitoring through the optical isolators. We can also drive some voltage on the PD monitors and verify the functioning of our ADCs. Once this test passes, it is straight forward to finish the remaining 6 SOS wiring and we would be good to install the chassis.

Attaching wiring diagram of c1susuaux2 acromag chassis. Any comments/modification suggestions should come soon as we'll go ahead and wire it soon.

Note: While accessing channels using caget on c1susuaux2, you might get a warning "Identical process variable names on multiple servers". You can safely ignore it. It just means that channel is accessible on that particular computer via two different network interfaces (martian network eno1 and acromag subnetwork eno2) and it will just pick one of them.