The interlocks are handled by the VEDCSHV project (see here)
Starting FSM
See above
Procedure after a powercut
Log on to windows terminal in the online network.
Open the directory G:\online\ecs\Shortcuts\VELO
Double click on VEDCSHV_UI_FSM
The following window appears:
expand VELOA/C_DCS
right click on VELOA/C_DCS_TB
take control by cliking the padlock
click on the Interlock circles (repeat the next 9 steps for all the three circles)
you will be prompted with the question "Do you want to change the ELMB state?", answer YES (preoperational)
You will get the Status_and_Event_reg window.
click on Check status (in commands frame), you will see all channels are masked (the mask box is ticked)
click on reset board, and then load mask configuration (both buttons are in the Commands frame)
check status again and you should see that the 4 interlocks fired.
click on the Send button in the Control Register Reset frame
To make sure that everything is ok (ie that the interlocks have gone) check status again
Close the panel
Switch on the Board again (click in the state of the corresponsing board and select "Switch_ON", in the VELOA/C_DCS_TB panel). The state becomes ready and the status of the ELMB becomes OPERATIONAL.
When an interlock fired because of the Temperature Boards the Interlock circle in the panel VELOA/C_DCS_TB will be RED
click on the Interlock circles (repeat the next 6 steps for all the three circles)
you will be prompted with the question "Do you want to change the ELMB state?", answer YES (preoperational)
You will get the Status_and_Event_reg window.
You will see some red fields in the panel (red fields do not matter when channels are masked);
In the status register frame you will see which interlock(s) fired;
In the control register reset you will see the corresponding interlocks and errors ticked, and the reset byte field filled with the right bit pattern.
click on Check status (in commands frame)
Click on Send in the Control Register Reset frame
Check status again
If you are lucky you will get everything OK (green), if not call an expert.
Trouble shooting
Hardware interlock signals coming from the temperature boards, Vacuum (forced until further notice, 28/05/2008), Cooling and BCM system (forced until further notice, 01/08/08) and to the LV and HV (taken out until further notice, 01/08/2008) systems, are treated into the interlock unit. See picture below:
This unit is located in D3E05 slot 6.
The input signal Leds (not the spare channels) on the from panel can have 3 states:
green - OK
orange - signal forced
no green nor orange LED on - interlock signal fired.
The output signal leds (not the spare channels) can be green (ok) or off (interlock fired)
Hardware interlocks between the PLCs (cooling-vacuum, vacuum-motion) are treated directly. An interlock status panel can be seen on the corresponding PLC.
The vacuum PLC receives status information from the LHC vacuum
The motion system is interlocked to the LHCb beam dump signal