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Entry  Fri Nov 17 16:31:11 2017, aaron, Omnistructure, Computers, Acromag wired up AcromagWiringMaps.pdf
    Reply  Fri Nov 17 17:10:53 2017, rana, Omnistructure, Computers, Acromag wired up 
    Reply  Wed Nov 22 00:54:18 2017, johannes, Omnistructure, Computers, Slow DAQ replacement computer progress 
       Reply  Wed Nov 29 21:40:30 2017, johannes, Omnistructure, Computers, Slow DAQ replacement computer progress 
          Reply  Mon Dec 4 22:06:07 2017, johannes, Omnistructure, Computers, Acromag XEND progress 
             Reply  Thu Dec 7 22:24:04 2017, johannes, Omnistructure, Computers, Acromag XEND progress sourcing_input.pngsourcing_to_sourcing_with_common_supply.pngIMG_20171207_193128928.jpg
                Reply  Fri Dec 8 12:06:59 2017, johannes, Omnistructure, Computers, c1auxex2 ready - but need more cables 
Message ID: 13463     Entry time: Mon Dec 4 22:06:07 2017     In reply to: 13458     Reply to this: 13468
Author: johannes 
Type: Omnistructure 
Category: Computers 
Subject: Acromag XEND progress 

I wired up the power distribution, and ethernet cables in the Acromag chassis today. For the time being it's all kind of loose in there but tomorrow the last parts should arrive from McMaster to put everything in its place. I had to unplug some of the wiring that Aaron had already done but labeled everything before I did so. I finalized the IP configuration via USB for all the units, which are now powered through the chassis and active on the network.

I started transcribing the database file ETMXaux.db that is loaded by c1auxex in the format required by the Acromags and made sure that the new c1auxex2 properly functions as a server, which it does.


  • Need to calibrate the +/- 10V swing of the analog channels via the USB utility, but that requires wiring the channels to the connectors and should probably be done once the unit sits in the rack
  • Need to wire power from the Sorensens into the chassis. There are +/- 5V, +/- 15V and +/- 20V present. The Acromags need only +12V-32V, for which I plan to use the +20V, and an excitation voltage for the binary channels, for which I'm going to wire the +5V. Should do this through the fuse rails on the side.
  • The current slow binary channels are sinking outputs, same as the XT1111 16-channel module we have. The additional 4 binary outputs of the XT1541 are sourcing, and I'm currently not sure if we can use them with the sos driver and whitening vme boards that get their binary control signals from the slow system.
  • Confirm switching of binary channels (haven't used model XT1111 before, but I assume the definitions are identical to XT1121)
  • Setup remaining essential EPICS channels and confirm that dimensions are the same (as in both give the same voltage for the same requested value)
  • Disconnect DIN cables, attach adapter boards + DSUB cables
  • Testing



[Aaron, Johannes]

We configured the AtomServer for the Martian network today. Hostname is c1auxex2, IP is Remote access over SSH is enabled.

There will be 6 acromag units served by c1auxex2.

Hostname Type IP Address
c1auxex-xt1221a 1221
c1auxex-xt1221b 1221
c1auxex-xt1221c 1221
c1auxex-xt1541a 1541
c1auxex-xt1541b 1541
c1auxex-xt1111a 1111

Some hardware to assemble the Acromag box and adapter PCBs are still missing, and the wiring and channel definitions have to be finalized. The port driver initialization instructions and channel definitions are currently locally stored in /home/controls/modbusIOC/ but will eventually be migrated to a shared location, but we need to decide how exactly we want to set up this infrastructure.

  • Should the new machines have the same hostnames as the ones they're replacing? For the transition we simply named it c1auxex2.
  • Because the communication of the server machine with the DAQ modules is happening over TCP/IP and not some VME backplane bus we could consolidate machines, particularly in the vertex area.
  • It would be good to use the fact that these SuperMicro servers have 2+ ethernet ports to separate CDS EPICS traffic from the modbus traffic. That would also keep the 30+ IPs for the Acromag thingies off the Martian host tables.
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