Power and CANBus ALARMS/RECOVERY:

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The two VME crates and six PL-500 dual power power supplies for the EEMC FEE are controlled via CANBus protocol. Launch the CANBus GUI from the top level EEMC screen with the green "POWER" button. (Alternatively use STAR alarm handler screens or command "eemc_canbus" from STAR slow controls). Note: the FMS shares this control network with EEMC.

Use the "pink" detail button at icon lower left to bring up VME/supply GUI, check error status, etc.

1. Crate or Power Supply trip
   1. VME Crates: check error/cause and reset crates (they are not expected to trip). If temperatures in the hall (WAH/Platform) are high, check fan speeds and temp levels (for tower supplies see note #1 at the bottom of this page).

      #90 has the slow controls VxWorks CPU
      #91 has the ETOW and ESMD data collectors

      A trip/power cycle of the slow controls crate will reboot VxWorks/slow controls (see recovery restart), while trip/power cycle of #91 will require that the data collector FPGA's be downloaded -- the latter now happens automaticallt (e.g., via "auto-config") at the start of every (hence, next) run.

      (Note: VxWorks operation produces the red "Bus System" light on crate #90 -- that is normal.)

   2. Power Supplies for FEE: Reset supply and perform the required reconfiguration

      #92-#94 tower FEE ... power cycle requires Tower "master reload" for affected crates
      #95-#97 MAPMT FEE ... power cycle requires MAPMT "master reload" for affected sectors
      

      See additional notes following the red line below.

2. CANBus GUI "all white"

   This means one has lost control of the Endcap VME crates and all FEE LV supplies:
   BUT likely all continues to run just fine (e.g., unless there are other alarms). To regain control requires a CANBus reboot. In principle control of all crates and supplies should come back up as is and without disruption

   To reboot CANBus: from sc3.starp.bnl.gov (or other, etc.)

   1. Find "EEMC CANBUS" on the STAR alarm handler "first platform VME" crate GUI (e.g., crate #70, rack 1C7). Use the detail button to open the "VME-70" display and then do a "SysReset" which will reboot the CPU in the crate and bring up CANBus (takes a while). [Update: GUI connection may no longer be available.]

   2. From sc3.starp.bnl.gov (or other, etc.)
      telnet address/server: eemccanpower.starp.bnl.gov
      power cycle using network switch interface

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   Note #1: Beginning with Run 11, sensors detecting air flow (from the WAH west wall mounted blower) on each Tower FEE crate pair sever as an interlock to the respective #92-#94 PL-500 supplies. These sensors read in range "11-13" under normal operating conditions; actual readings are indicated on the supply GUI as the value for the "Air Flow P-Transducer".

   Note #2: The MAPMT FEE, located in the boxes mounted on the poletip, is water cooled. There is no equivalent interlock for water flow, but the individual FEE boxes mounted on the back of the poletip have a hardware-set temperature trip in case of cooling loss, blockage or bubbles. Box temperatures and trips are monitoring from the MAPMT FEE GUI and may or may not shut off the corresponding PL500 supply.