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EMC Monitoring: Interlocks


V00-02 Jan 11 2000
Pierre-Alexandre Fischer
  • Instructions in case of alarm or chiller trip
  • system description
  • resetting a trip


  • Instuctions in case of Interlock alarm or chiller trip
    • Page the expert (Bill Wisniewski pager 849 9661)
    • identify the cause of the alarm by either looking at the EPICS panel or by going to the chiller itself and looking at the alarm diodes on the front panel.
    • The Epics panel provides help through the "GUIDANCE" buttons. Use it.
    • If the chiller is stopped, try to restart it following the instructions in the red folder on top of the Chiller
    • If the restart was succesful and the alarm(s) went away on the chiller, reset the alarm(s) on the SIAM by following the procedure described at the bottom of this page
    • If restarting the chiller failed, get the expert as quickly as possible. If you followed item one, he should already be here !
  • system Description

    The logic implemented with the SIAMs is decribed Here
    Access to the Epics Panel from the main monitoring display is done via this button:
    Interlocks Icon
    The main panel shows the 4 siams of our system:
    siam main panel

    SIAM0: END CAP
    End cap siam has 5 channels. Four of them are connected to 4 alarm signals from the end cap fluorinert chiller. The fifth channel is the status of the spare chiller. Updated instructions on what to do in case of alarm of one of those channels, click on the guidance button.  The output of this siam is used to interlock all the low voltage power supplies for the end cap.

    siam 0

    SIAM1: BARREL
    Barrel Siam has 6 channels connected. Channel 0 is the alarm signal from the water chiller. Channels 1 to 4 are alarms from the Fluorinert Chiller. Channel 5 is the status of the spare chiller. For detailed instructions on what to do in case of alarm, please click on the guidance button of the siam display. The output to this siam is used to interlock all the low voltage power supplies for the barrel EMC.

    Siam 1

    SIAM 2: General
    This SIAM centralizes the alarms from Siam 0,1 and 3 and builds the overall EMC status.
    The output signal to this siam is sent to the anonciator panel.

    siam 2

    SIAM3: SPARE
    Spare Siam has 4 channels connected. Channels 0 to 3 are alarms from the spare Fluorinert Chiller. For detailed instructions on what to do in case of alarm, please click on the guidance button of the siam display. The output to this siam is used to interlock all the low voltage power supplies for the barrel EMC and BARREL. To achieve that the siam output is directed to input 4 of the EndCap Siam and input 5 of the Barrel Siam.

    Siam 1

  • How to reset a trip
    Identify the channel that caused the alarm using the display described above. If the alarm condition is gone both red and green leds should  be on for this alarm channel. Make sure the system is in safe condtion before resetting the trip, then click on the "RST" button on the left of the channel number:
    reset trip
    the Reset Button is the greenish button close to the "2" on the image.
     
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Last modified P-A Fischer  January 11 2000