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VELO HV Basic Operations

 

Introduction Upgrade I

The VELO HV project controls the whole Velo High Voltage system; it runs on vehv01 under the velo_user account.

 

Troubleshooting

In case of problems in communication, check the status of the CANBus. Try to reset the systec driver

sudo modprobe -v systec_can
sudo modprobe -v can
sudo modprobe -v can-raw
sudo modprobe -v can-bcm
sudo modprobe -v can-dev
lsmod | grep can
systemctl -a | grep can
sudo ip link set can0 type can bitrate 250000
sudo ifconfig can0 down
sudo ip link set can0 type can restart-ms 100
sudo ifconfig can0 up
sudo ifconfig can0 txqueuelen 10000
sudo ip -det -stat link show can0

More information about https://readthedocs.web.cern.ch/pages/viewpage.action?pageId=68027711

Introduction: run1+run2

The VELO HV project controls the whole Velo High Voltage system; it runs on vedcs03 under the velo_user account.

 

How to Switch on High Voltages

 

  • From the VELO:TOP window open the main HV panel (VELO_HV:TOP)
 
  • Select from the State button the recipe you require:
 
    • Go_OFF - turns off the HV
 
    • Go_STANDBY1 - apply 10V
 
    • Go_STANDBY2 - apply 145V to to all modules
 
    • Go_READY - apply 150V to all modules
 
    • Do_Emergency_OFF, ramping down
 
    • Load - this is not needed
Using the top most state button this can be issued for the whole detector

Using the VELOA_HV (VELOC_HV) state button this can be issued for the A (C) side only.

After selecting the recipe confirm this by pressing "send" on the pop-up window.

Note, these commands are issued to the Pile-Up detectors also.

The buttons on the righthand side allow manual operations that override the voltage chages via the state button. They can be useful if the system gets stuck, and provide a backdoor to override the central control in the case of system problems.

The interface to performing an IV scan is also available through this button (see instructions below).

Buttons to clear all alarms are also provided.

VELO_HV_TOP.png

 

How to Switch on High Voltages on a set of 8 channels (one board)

The VELO power supply modules are split into boards, each board controls 8 channels.

 

  • From the VELO_HV:TOP panel, select VELOA_HV (or VELOC_HV)
 
  • The VELOA_HV panel is then displayed, the state buttons for individual boards can then be used to issue recipes, see the instructions for "How to turn on all high Voltages"
VELOA_HV_TOP.JPG

 

How to Switch on High Voltage on a single channel

* From the VELOA_HV (or C) panel, select the board that contains the channel you wish to control. For example BOARD00, displays the window VELOA_HV_BOARD00:TOP

* BEFORE controlling the channel the recipe must be loaded (this differs from the board level, or all velo level instructions). Use the state button of the ConfDB to do this. For example select VELOA_HV_BOARD00_ConfDB and select LOAD. This is only needed if the recipe has not previously been loaded.

* Use the state button of the corresponding channel, for example VELOA_HV_BOARD00_CH03, to then select the state you wish (e.g. STANDBY1)

* (the VELOA_HV_BOARD00_MA00 controls the whole board)

VELOA_HV_BOARD_TOP.JPG

* If the ConfDB is in state "NOT_READY", please LOAD it:

VELOC_HV_BOARD02_LOAD.JPG

 

How to Perform an IV Scan

IV Scan Instructions

Topic attachments
I Attachment Action Size Date Who Comment
Unknown file formatJPG Console_Panel.JPG manage 57.8 K 2015-02-27 - 17:02 KarolHENNESSY  
Unknown file formatJPG Device_Module.JPG manage 39.2 K 2015-02-27 - 17:02 KarolHENNESSY  
PNGpng HVOpcServer-console_1.png manage 78.3 K 2015-02-27 - 17:02 KarolHENNESSY  
Unknown file formatJPG VELOA_HV_BOARD_TOP.JPG manage 106.1 K 2015-02-27 - 17:12 KarolHENNESSY  
Unknown file formatJPG VELOA_HV_TOP.JPG manage 154.3 K 2015-02-27 - 17:12 KarolHENNESSY  
Unknown file formatJPG VELOC_HV_BOARD02_LOAD.JPG manage 103.8 K 2015-02-27 - 17:12 KarolHENNESSY  
PNGpng VELO_HV_TOP.png manage 44.0 K 2015-02-27 - 17:12 KarolHENNESSY  
Topic revision: r2 - 2021-10-12 - ClaudiaBertella
 

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