1. Operation of CSC DCS
Ryan Carroll
Carnegie Mellon
29-Sept-2009

2. CSC Operating Philosophy
The Temperature is the only indicator of cooling effectiveness Central DCS needs
Gas going out is not the end of the world. Wait an hour if it happens during day or swing shifts, or until 8 am if on graveyard shift, then call our Field Manager
If the Central Shifter can fix a problem from their station, we have provided them the full solution and they should only call us if it involves turning something off and after any action is taken.
If the problem requires human intervention, the solution for the shifter should be to call CSC Field Managers
29-Sept-2009
Operation of CSC DCS

3. Top Level of CSC DCS User Interface
Chamber
View
Temperature Monitor
Overall State
High Voltage Supplies
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Operation of CSC DCS
Low Voltage
Supplies

4. Terminology Each disc is called a Station
Peripheral Crate
Each disc is called a Station
Trapezoids the wheel are composed of represent Chambers
Squares outside wheel represent Peripheral Crates
Each Peripheral Crate controls a number of Chambers
LV = Low Voltage
HV = High Voltage
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Operation of CSC DCS
Chamber

5. CSC Status Move cursor over Chamber to read LV, HV, and Temperature
You must double click the chamber to perform control actions upon it
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Operation of CSC DCS

6. Standby State
Standby indicates that the high voltage has been lowered below data taking levels
This is currently also our Safe state
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Operation of CSC DCS

7. Temp/HV Monitor There are 4 mode options for the value monitor display
Max Temperature
Average Temperature
Max HV
Average HV
In continuous running mode keep monitor on Average Temperature
While voltages are changing put monitor on Max High Voltage
If 18 or more chambers are red (T > 32 °C), turn off entire system and call Field Manager (165509)
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Operation of CSC DCS

8. Possible Errors
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Operation of CSC DCS

9. CommunicationLost
When a chamber has a question mark on it, that means it has lost communication with DCS
Mousing over will reveal a No Communication message
If a chamber is out of communication for over an hour, call the CSC Expert (161972)
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Operation of CSC DCS

10. Gas in Error
CSCs are designed to run for 24 hours without fresh gas while beam is off.
If gas goes out during the Morning shift or Afternoon shift, wait an hour and then call the CSC Field Manager (165509) if gas is still in error.
If gas goes out during the Owl shift, inform the morning shifters of the problem and have them call (165509) at 8 am if the gas is still in error.
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Operation of CSC DCS

11. Cooling in Error
Our Cooling is only indicative as to whether it is safe to turn on.
See the next slide to see if the error is only a communication lost error
If the Cooling goes into error while CSC system is on, monitor chamber and rack temperatures.
If 18 or more chambers are red (T > 32 °C), turn off entire system and call
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Operation of CSC DCS

12. Cooling Error - No Communication
Most commonly when our cooling goes into error it is because there is no communication to the server
Double click CSC_COOLING and then WATER_and_AIR_COOLING to check
If the flow fields show “no data” and a Device Not Connected message is shown, there is no real problem
Monitor the Yoke and Rack circuits on the cooling screen
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Operation of CSC DCS

13. High or Low Voltage in Error
If either of these subsystems are in error a Chamber or Peripheral Crate will often also be in error.
The following slides are all examples of what to look for when High or Low Voltage go into error.
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Operation of CSC DCS

14. High Voltage Trip (Diagnosis)
If a single chamber goes into error, and the high voltage is in error, the HV in the chamber has tripped.
Double click on the chamber, then double click on box ending in “_HV” then go to the next slide
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Operation of CSC DCS

15. HV Trip (Action) Select the channel with Ch_Trip for status
Press FORCE ON
If a chamber trips three or more times in a shift, call the CSC Expert (161972)
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Operation of CSC DCS

16. HV Trip (Action)
Our inner ring of chambers on Station 1 have a different interface
If you see this screen instead, select the drop down menu of the sub-system in error and select Off
After 10 minutes in the same menu select On
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Operation of CSC DCS

17. LV for Single Chamber Out
If Low Voltage currents or voltages are zero for a single chamber, the chamber has lost its firmware
This can be ignored when not running
Otherwise call the CSC Expert (161972)
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Operation of CSC DCS

18. Peripheral Crate Loses LV (Diagnosis)
If a Peripheral Crate is in error and it’s corresponding chambers have lost communication, the Peripheral Crate has lost Low Voltage going to it.
Check if LV Primary Supplies are also in error
Double click on the Peripheral Crate in error and proceed to the next slide
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Operation of CSC DCS

19. Peripheral Crate Loses LV (Action)
Single Click the TO SWITCH OFF button
Call the Field Manager at
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Operation of CSC DCS

20. Low Voltage PrimaryLost
When a Peripheral Crate Loses LV, check the Low Voltage Primaries (Labeled Maratons)
If a Maraton goes into error, double click the Maraton in error and then in the top drop-down menu select “Off”
Call the Field Manager (165509) after turning off the Maraton
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Operation of CSC DCS

21. Peripheral Crate Overheats (Diagnosis)
If a Peripheral Crate is in error while it’s Chambers are fine, mouseover the Peripheral Crate
Check the DMB temperatures to see if they are too hot
If so, double click on the Peripheral Crate in error and proceed to the next slide
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Operation of CSC DCS

22. Peripheral Crate Overheats(Action)
Single Click the TO SWITCH OFF button
Call the Field Manager at
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Operation of CSC DCS

23. In the drop-down menu for CSC_HV select Off
If a HV Primary Supply is in error, this is what the system will look like.
In the drop-down menu for CSC_HV select Off
Call the Run Field Manager at after turning the High Voltage off
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Operation of CSC DCS

24. Other Error / Unknown State
Please double check to see if it looks similar to one of the previous problems and if so please perform those actions.
No action described in this manual will damage our system
If there is no procedure or the situation is unique please call the CSC Field Manager (165509). ?
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Operation of CSC DCS

25. Changing High Voltage
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Operation of CSC DCS

26. All On State This is our data taking state
This state is not safe for unknown or dangerous beam conditions
To reach this state from any state, select ON from CMS_CSC
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Operation of CSC DCS

27. Standby State This is our safe state
This state is for unknown or dangerous beam conditions
To reach this state from any state, select STANDBY from CMS_CSC
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Operation of CSC DCS

28. Outer ON State
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Operation of CSC DCS

29. Inner ON State
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Operation of CSC DCS