Implementation of the Pixel IBL
Contents
1. false amp amp interlock false state STOPPED else if cooling_running true amp amp operation_mode Standby amp amp state_step Standby state STANDBY else if interlock true state TRIPPED else if operation_mode Bakeout state BAKEOUT else if operation_mode Maintenance state MAINTENANCE else state UNKNOWN And for the status if state UNKNOWN status FATAL oO lse if lse if 0 status OK interloc status ERROR alarm true status WARNING August 2014 NB It is impossible that both plants are in state OPERATION i e cooling ready true The variable cooling_ready also known as Allow_DET cannot be set true at the same time on both plants The hardware prevents it The overall state and status of the IBL_CO2 based on the state and status of the plants is determined by the following recipe If one of the plants is in state OPERATION then the overall state is OPERATION The overall status is taken over by the status of the plant in OPERATION Else the overall state is STOPPED and the least severe status of one of the plants is taken to be the overall status The vacuum state has no influence on the overall state The vacuum status however has to be combined with the overall status up to now Take the most severe of the 2 and that one will be the overall status The ATLAS FSM tree does not know about OPE2. sure you select ATLPIXIBLCO2 The following managers are important for the project 1 CO2_Reader ctl A WinCC control script with argument num 20 Its start mode is set to always The main task of this manager is to obtain at regular intervals the DIP variables of ATLGCSIS2 The current interval time is 30 seconds v1 0 August 2014 2 CO2_Watchdog ctl A WinCC control script with argument num 21 Its start mode is set to always This manager has several tasks Determine at regular intervals currently every 30 seconds based on the DIP and MODbus variables the state and status of the plants vacuum DIP and MODbus connectivity An overall state and status of the IBL CO2 is determined as well Check at regular intervals currently every 5 minutes the existence of the _address_configs of the MODbus variables Decode the MODbus status_register variable and update the corresponding boolean data point variables Increment every 2 seconds the DCS watchdog MODbus variable by one It acts as a heartbeat for the plants 3 Modbus driver 2 A driver with argument num 2 and start mode set to always This driver is meant for plant A 4 Modbus driver 3 A driver with argument num 3 and start mode set to always This driver is meant for plant B The Modbus drivers make use of a common poll group type _PollGroup data point _Pol1l_IBLCO2 with a readout frequency of currently 10 seconds v1 0 4 Us
3. RATION TRIPPED etc For the FSM representation the IBL CO2 node knows only 3 of the ATLAS supported states READY NOT_READY and UNKNOWN The following translation is used from IBL CO2 overall state to ATLAS FSM node if state OPERATION fsmState READY else if state NOT_READY fsmState NOT_READY else fsmState UNKNOWN The fsmStatus is copied without translation from the overall status E or TRIPPED v1 0 August 2014 6 FSM It is foreseen that the panel as show in figure 3 will be used for the FSM screen Up to now August 2014 the full implementation is not available yet However a first attempt of the FSM node is ready See figure 4 The states are propagated successful however there is still something wrong with the status Another item what is missing is the alarm handling for the alarm screen Everything is expected to be ready before the end of September 2014 PIX_IBL_CO2 fwUiAtlasFrame M gt Blfvouser e ie ibico2 READY rer I Interlock Status Plant A Plant A Plant B Start Plant B STANDBY Temporary Stop Vacuum GONE Plant A Plant B Plant A Plant B Cooling Ready Allow DET me Plant Pump Operation Mode Standby OpMoSt Chiller Cooling Running RunOst Setpoint Temp c Heater Saturation Temp cl Pressure Valve Temperature Additional Parameters Sensor Plant A Plant B Junction Box State Step Cd acc
4. er Manual August 2014 As long as the final FSM for the ACR is not ready an alternative way to monitor the IBL CO is necessary Therefore it is necessary to logon pcatlpixlcs20 The project supports only 2 commands 1 Adjust user temperature setpoint C equal to both plants 2 Swap plant Execute the following command WCCOAui proj ATLPIXIBLCO2 p CO2_VarModbus pnl As a result a panel will appear as shown in figure 2 ision_1 CO2_ arModbus pnl IBL CO2 Modbus Variables Read Variables Plant A Plant B User temp setpoint 5 00 10 00 C Accumulator saturation temp 4 98 4 98 C Status register x6 x2 Write Variables Plant A Plant B User temp setpoint 0 00 0 00 C DCS watchdog 169215 169215 Plant swap request o ACR Fsm User temp setpoint 0 00 C Swap Status Register Swap request Cooling running Cooling ready Start Temporary Stop Full Stop olx lt m c ec S c a ja Swap_Rcv V WW Runost VV FT Allow_DET T VF Statist M JF TStopist M T FuStopist Invalidate Figure 2 IBL CO2 MODbus variables The MODbus variables could be read write DIP in our project is read only So only by MODbus it is possible to issue a command In figure 2 there are 6 read variables 3 for each plant The read back value of the user temperature setpoint The read back value of the accumulator saturation temperature on the right side of figure 2 Some
5. erlock Status IBL CO2 Plant A Plant B PlantA atari Plant B STANDBY Temporary Stop Vacuum Full Stop Main Parameters Alarms Plant A Plant B Plant A Plant B PLC Plant Cooling Ready Allow_DET Cooling Running RunOst Pane Operation Mode Standby OpMoSt Chiller Setpoint Temp Heater Saturation Temp Pressure Valve Temperature Additional Parameters Sensor 24V PS Plant A Plant B j Junction Box State Step Cd accumulator Cd in STB Vacuum State Transition T1 T273 T2 T5 Filters UX15 Junction Box Plant A Plant B Freon Chiller CO2 pump status Liquid phase pump Compressed Air Chiller with H2O Chiller with Air 30 52 30 49 40 07 38 85 Heater Inlet press 43 55 43 55 bar Accumulator press bar Inlet temp 4 20 4 60 C CO2 liquid level 1 Return press 30 93 30 58 bar Auto setpoint T 4 90 5 00 C Return temp 4 90 5 00 C T after condensor 45 50 42 00 C Press after pump 48 38 45 45 bar Flow 28 84 29 49 o s Vacuum Temp from exp 5 10 35 30 C Alarms Sub cooling 40 45 51 42 C Running IBL Status E UXL5A Connectivity UX15 B PlantA PlantB DIP MODbus Figure 3 General overview of the IBL CO2 v1 0 August 2014 Very important is the first line of the panel containing the word IBL CO2 Its background has to be green ok Otherwise yellow orange red one of the 2 scripts CO2_Reader or CO2_Watchdog are not runn
6. ing anymore This is a serious matter All the data will be undefined As mentioned before the CO2_Watchdog script takes care of the state and status of the different sub systems as presented in the upper left corner IBL CO2 the overall Plant A Plant B and Vacuum These states go to UNDEFINED if the connectivity to the DIP or MODbus variables are down In the lower left corner the connectivity is shown The other variables are combined into logical groups Main parameters these variables together with the interlock variables determine the state of the plant The variables come from 2 sources DIP and MODbus In case of inequality the MODbus value prevails Additional parameters Interlock Status like the main parameters based on 2 sources DIP and MODbus The MODbus variable prevails Alarms UX15 Junction Box Vacuum 5 State and Status The main task of the CO2_Watchdog script is to determine the state and status of the plants For these plants the following states and status have been defined STATE OPERATION NOT_READY STOPPED STANDBY BAKEOUT MAINTENANCE TRIPPED UNKNOWN STATUS OK WARNING ERROR FATAL For the state of a plant the following recipe is used if connectivity false state UNKNOWN else if cooling_ready true state OPERATION else if cooling_running true amp amp operation_mode Operation state NOT_READY else if cooling_running
7. is2 cern ch 212 e MODbus The MODbus variables in total 11 for both plants are obtained by two MODbus drivers one for each plant The concerned data points have a dedicated _address_config A common polling group takes care of a regular readout It is assumed that the MODbus readout is more reliable and that in case of a mismatch between a DIP value or a MODbus value the latter prevails v1 0 3 WinCC ATLPIXIBLCOZ project The console of the ATLPIXIBLCO2 WinCC project is shown in figure 1 WinCC OA 3 11 SP1 Console Project jo g 4 F882 peo a Manager Process Monitor Monitoring project Process Monitor Database Manager Event Manager Control Manager Simulation Driver Simulation Driver Simulation Driver Distribution Manager User Interface User Interface User Interface Control Manager Control Manager Control Manager Control Manager Control Manager Control Manager User Interface User Interface Control Manager lt WCCOAsmi3 11 gt in op 10 Modbus Driver 2 Modbus Driver Options f pvss_scripts st num 2 num 3 m gedi m para p CO2_Console pr num 20 CO2_Rea num 21 CO2_Wat f fwinstallationAge f fwScripts st unDistributedContn fwFsmSrvr p fwDeviceEditor p fwTrending fwT ri never touch me nl never touch me nl num 2 Figure 1 Console ATLPIXIBLCO2 1 le le bi le x elele t August 2014 NB Be aware that more WinCC projects run on pcatlpixlcs20 Make
8. remarks o CO2_Watchdog script o The swap request bit and command is only known to plant A The names on the left are used as names for the data points On the right as they are used in the document o The Start Temporary Stop and Full Stop are the names of the interlocks The status register of which the individual variables are split into the Status Register Frame The decomposition of the status register into the individual booleans is one of the tasks of the v1 0 August 2014 o If the Invalid button is pressed the background color of the read variables will turn yellow Within 10 seconds they turn white again indicating the _PollGroup and Modbus drivers are running The write variables should be handled with care Use if needed only the ACR Fsm user temp setpoint and Swap button The user setpoint is written to both plant A and plant B If a value is entered a confirmation is needed Yes or No The Swap button is only enabled if one of the plants is in state OPERATION and the other in STANDBY Otherwise it is not possible to swap The swap command has to be acknowledged Yes or No as well Note The write variable DCS watchdog will be incremented by 1 every 2 seconds another task of the CO2_Watchdog script To get a general overview of the IBL CO2 execute the following command WCCOAui proj ATLPIXIBLCO2 p CO2_Fsm pnl amp It will result in a panel as shown in figure 3 ision_1 CO2_Fsm pnl of x Int
9. umulator Cd in STB Vacuum State Transition TIT2T3 T2 T5 Filters Freon Chiller ieLco2 1Ge OG gt coz pump status Liquid phase pump m UX15 Junction Box Compressed Air No panel available Chillar with H20 PlantA Plant B Heater Add panel within panels fwAtlasSecondaryPanels Chiller with Air for PIX_IBL_CO2 Accumulator press CO2 liquid level Inlet press 43 55 55 Inlet temp 4 20 60 Return press 30 93 58 Return temp 4 90 Auto setpoint T T after condensor Press after pump PIX_IBL_CO2 node Flow Vacuum PIX_IBL_CO2 obj Temp from exp 7 Sub cooling Running Status E m Connectivity PlantA Plant B DIP MODbus Figure 4 FSM PIX IBL CO2
10. v1 0 August 2014 IBL COz DCS 1 Introduction The Insertable B Layer IBL of the ATLAS Pixel detector is cooled by liquid CO The liquid CO is provided by two cooling plants called A and B each one capable to cool the IBL Two plants guarantee a certain redundancy Each plant is controlled by a PLC which is connected to the LHC technical network In order to implement a control system to be integrated into the Pixel FSM as used in the ATLAS Control Room ACR the data has to be exchanged from the LHC technical network to the ATLAS network Two mechanisms are used DIP and MODbus DIP for the majority of the data and MODbus which is regarded as more reliable for the critical data In USAI5 a WinCC project is dedicated for this purpose and also to facilitate the FSM part The main source of information which was used to implement it is the EDMS document nr 1233464 SPECIFICATION OF CONTROL INTERFACE BETWEEN COOLING CONTROL AND ATLAS DCS Rev No 11 16 July 2014 by Lukasz Zwalinski et al 2 Global Information The Linux PC used pcatlpixlcs20 WinCC project ATLPIXIBLCO2 id 330 e DIP The DIP variables are available on a WinCC project called ATLGCSIS2 id 212 This project maintained by the central DCS team obtains its data by means of the DIP protocol It is quite simple to read by means of dpGet the variables For this purpose the following line had to be added to the config file dist distPeer pcatlgcs
Download Pdf Manuals
Related Search