CAEN1527 Network And Status Watchdog

Introduction

On Request of the HADES MDC group a local EPICS based watchdog unit is built to
  1. set and get via network as EPICS client the values of an extra measurement channel of the CAEN Crate (low Voltage)
  2. measures via an ADC ( HadCon2) the output voltage
  3. compares the results, settings, and the status
  4. in case of failures
    1. issue a "soft CPU reset" via the external, activated RESET input
    2. redo checks
    3. if still in case of failure:
      1. issue a RAMPDOWN cmd via the modified external "KILL" input of the special MDC CAEN1527LC version.
      2. wait the maximal rampdown time
      3. issue a "soft CPU reset"
      4. check output Voltage:
        1. . if still not Zero escalate Alarming
      5. remain in "safe shutdown"

Sketch

Overall

sketch1.jpg

Hardware Setup:

NetworkControl-Hardware.png

Setup

Hardware

Software

EPICS IOC

tar ball

git
iocBoot section: st.cmd
App.../src section, executable
App.../Db section, the database
protocol StreamDevice Files
miscellaneous


-- PeterZumbruch - 23 Aug 2016

-- MartinMitkov - 01 Sep 2016

-- PeterZumbruch - 15 Jan 2018
Topic attachments
I Attachment Action Size Date Who Comment
20160427_153804.jpgjpg 20160427_153804.jpg manage 10278.5 K 23 Aug 2016 - 08:27 PeterZumbruch sketch of function
NetworkControl-Hardware.pngpng NetworkControl-Hardware.png manage 1285.7 K 02 May 2016 - 10:26 PeterZumbruch Hardware Setup
Watchdog_voltage_divider.xlsxxlsx Watchdog_voltage_divider.xlsx manage 31.6 K 20 Sep 2016 - 09:24 MartinMitkov Voltage divider calculations and expected ADC values
caen1527LC_watchdog_extension_boards.pdfpdf caen1527LC_watchdog_extension_boards.pdf manage 994.4 K 20 Sep 2016 - 09:21 MartinMitkov hardware schematics and layout
sketch1.jpgjpg sketch1.jpg manage 10278.5 K 23 Aug 2016 - 08:28 PeterZumbruch sketch of function
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Topic revision: r9 - 15 Jan 2018, PeterZumbruch
 
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