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

click to enlarge: sketch1.jpg

Hardware Setup

NetworkControl-Hardware.png

Setup

Hardware

Raspberry Pi + HadCon2 + Relay Board HV Tap Alternative HV Tap
click to enlarge: 20180115_111935.jpg click to enlarge: 20180115_111956.jpg click to enlarge: 20180115_112015.jpg

Software

EPICS IOC

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


-- PeterZumbruch - 16 Jan 2018
-- MartinMitkov - 01 Sep 2016

-- PeterZumbruch - 16 Jan 2018
Topic attachments
I AttachmentSorted ascending Action Size Date Who Comment
20160427_153804.jpgjpg 20160427_153804.jpg manage 10278.5 K 23 Aug 2016 - 08:27 PeterZumbruch sketch of function
20180115_111935.jpgjpg 20180115_111935.jpg manage 755.0 K 16 Jan 2018 - 09:23 PeterZumbruch Raspi + HadCon + Control
20180115_111956.jpgjpg 20180115_111956.jpg manage 823.5 K 16 Jan 2018 - 08:23 PeterZumbruch HV Tap
20180115_112015.jpgjpg 20180115_112015.jpg manage 167.5 K 16 Jan 2018 - 09:03 PeterZumbruch HV Voltage Divider Alternative
caen1527-watchdog.7z7z caen1527-watchdog.7z manage 9.7 K 16 Jan 2018 - 08:24 PeterZumbruch Tarball Developments Martin Mitko
caen1527LC_watchdog_extension_boards.pdfpdf caen1527LC_watchdog_extension_boards.pdf manage 994.4 K 20 Sep 2016 - 09:21 MartinMitkov hardware schematics and layout
NetworkControl-Hardware.pngpng NetworkControl-Hardware.png manage 1285.7 K 02 May 2016 - 10:26 PeterZumbruch Hardware Setup
sketch1.jpgjpg sketch1.jpg manage 10278.5 K 23 Aug 2016 - 08:28 PeterZumbruch sketch of function
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
Topic revision: r12 - 16 Jan 2018, PeterZumbruch
 
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