Status of the Roman Pot Movement System and the Interlocks Mario Deile 10.03.2010
Dec 31, 2015
Status of the Roman Pot Movement System and the Interlocks
Mario Deile10.03.2010
Achieved during the Shutdown
Lessons from the 2009 run:
• RP movement system operational but:• stability issues• position calibration not satisfactory because of HW interventions after the calibration
• Interlocks functional according to machine requirements but:• some less critical components missing (movement inhibit, emergency extraction)• some functionalities implemented on a “bricolage” level (OVERRIDE1 flag given by shorting an interlock box input with a cable)
Improvements during the shutdown:
• Concerted action of the experts to track errors and improve stability • New LVDT position calibration• New geometrical survey of the RP, this time including the BPMs• Systematic test of all RP microswitches, controlled by CCC and TOTEM DCS• Construction of a control panel in the TOTEM CR with
• emergency push buttons (e.g. RP extraction via springs)• key-protected switches for OVERRIDE signals and movement inhibit
• First part of interlock tests done
Microswitches and Electrical Stoppers Limiting the RP Travel
from Xavier Pons
Interlock Block Diagramme
Home Switch 1AND
RP_HOME 1
RP_HOME 12x 12
LVDT 1
FESA
comparePosition 1
Position 12
x 12
Limits
GMT (SMP)
CIBU 1(double)
ALL_RP_HOME
DEVICE_ALLOWED
USER_PERMIT1(Beam 1)
USER_PERMIT1(Beam 2)
Home Switch 12
LVDT 12
x 12
compare
CIBF 1INJECTION_PERMIT
(Beam 1)
CIBF 2INJECTION_PERMIT
(Beam 2)
TOTEM Operator OVERRIDE1 OR
STABLE_BEAM
NOT_BACK_HOME
IN MOTOR CONTROL RACK
ORCIBU 2(single)lent to CMS until spring
2010
DAQTR_OUT USER_PERMIT2(Beam 1 + 2)
IN S2E11 (TRIGGER/DAQ) RACK
x 12ALL_RP_HOME Motor
Control
DAQTR 1AND
DAQTR_OUT 1
DAQTR_OUT 12x 4
DAQTR 4
x 4
DAQTR DOWN
OVERRIDE2
all machine flags
x 12
TOTEM INTERLOCK CARD
IN CMSINTERLOCK RACKS1E08
OR
AND
ANDAND
all machine flags
ALL_LVDT_OK
ALL_LVDT_OK
hardwired to 1 until needed
Remaining Issues
Near and medium future:
• Completion of interlock tests scheduled for Fri/Sat 12/13.03. (needs very special machine conditions and collimation expert operations)• Stability of movement control system to be observed (still occasional crashes of PXI or FESA machines; not seen during operation).• No further HW/SW modifications allowed before and during the run (would invalidate the interlock tests)• Train semi-experts for depannage of the motorisation computers• During the run: repeated BLM response studies (cooperation of TOTEM + collimation group + BE-BI)• Try to reconcile the collimation alignment and the BPM measurement using the survey
Long-term plans:
• Improvements of the interlock logic (to be implemented on our spare interlock box):• Addition of a manual injection inhibit (so far, injection permit fully determined by RP home switches)• Separation of injection and beam permits for beam 1 and 2
• Problem: state of the OVERRIDE keys not transmitted to DCS no remote monitoring• Addition of an emergency RP extraction possibility in the CCC ?
Backup Material
Prevent machine mode changes while detectors not prepared:
Handshakes via DIP
functional in 2009 handshake test done
Injection Permit hardware signal from interlock card, based on RP “home” microswitches
functional in 2009 microswitch test done,
injection permit test done
Prevent illegal and unwanted RP positions and movements:
automatic retraction hardware signal from interlock card, based on RP position, machine mode
functional in 2009 new position calibration done,
interlock test partly done
emergency extraction button not impl. in 2009 implemented and tested
movement inhibit not impl. in 2009 implemented and tested
Dump the beam in case of illegal RP position:
USER PERMIThardware signal from interlock cardbased on RP position, machine mode and position limits from collim. system
functional in 2009 new position calibration done,
interlock test partly done
Possibility of expert operation outside “STABLE BEAMS” (collimation group studies):
OVERRIDE1 signal (input to interlock card)
crude solution in 2009
key switch implemented and tested on 13.02.
Summary: Interlock Functionalities and Status
System Overview.
CCCTOTEM
FESA Server
NI PXI
Motor Control
Roman pots
Position requests, limits
Position requests
Alarms
Alarm
s
Extra
ctio
n
Emer
genc
y Ext
ract
ion
CIBU, CIBF
Interlock control rack (common with CMS)
USER_PERMIT, INJECTION_PERMIT
FESA ICD
DIM ICD
Interlock card
GMT
Mac
hin
e m
od
e O
VE
RR
IDE
STABLE_BEAMS, DEVICE_ALLOWED
microswitches
Interlock Block Diagramme (part 2)
Motor Control
ALL_RP_HOME
all machine flags
ALL_LVDT_OK
interlock signals
zoom
NOT_BACK_HOME BACK_HOME
x6
Bea
m 1
USER_PERMIT1_B1
USER_PERMIT1_B2
OR
OR
x6
OR
OR
Bea
m 2
ALL_LVDT_OK
ALL_RP_HOME
RP_HOME(i) [i = 1, … 12]
all machine flagsIn
form
atio
nIn
form
atio
nUSER_PERMIT2
x6
x6
EXTRACT
(springs via “disable”)
EXTRACT
EXTRACT
EXTRACT