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Message ID: 1564     Entry time: Wed Aug 5 10:18:54 2015
Author: Aidan 
Type: Summary 
Category: Computers 
Subject: Summary of installation of Acromag units and control workstation 

Summary of installation of new hardware:


  1. ACROMAG1 computer.
    1. This is a desktop running a new install of Ubuntu 12.
    2. It is on the CTN lab network and has been assigned the static IP address, with a Gateway
    3. We can’t seem to access the regular internet on this machine just yet.
    4. I’ve set up the standard CONTROLS account
    5. I’ve installed EPICS per https://dcc.ligo.org/LIGO-T1400200 that includes the MODBUS app that can access the ACROMAG units.
  2. ACROMAG units
    1. The XT1221 (ADC) and XT1541 (DAC) units are installed in the northwest rack
    2. They have static IP addresses:



  1. They are getting a temporary +18V to power them.
  2. The XT1221 is attached to the router and the XT1541 is daisy-chained to the former.
  3. I need to check the averaging settings on the ADC unit to make sure they’re not overtaxing the system
  1. MODBUS/EPICS software
    1. I set up a MODBUS IOC per https://nodus.ligo.caltech.edu:30889/ATFWiki/doku.php?id=main:resources:computing:acromag
    2. The interface to the ACROMAG units is defined in acromag.cmd
    3. The input channels are defined in IOCTEST.DB and these report a value in counts


  1. We calibrated created three CALC channels that provide outputs calibrated in VOLTS. The calibrations are hardcoded into the database file.




  1. The two ISS channels are connected to their respective PDs
  2. The RF_DC output goes through an SR560 with a 30Hz pole and 50x gain on it to amplify the signal before the ADC.
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