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CIBFX deployment in the SPS and North Area
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Minutes of the meeting between TE-MPE and SY-EPC on CIBFX deployment in SPS and SPS NA
Present: Yves Gaillard, Ivan Josifovic, Richard Mompo, David Nisbet, Ivan Romera, Jan Uythoven, Thomas Zickler
Excused: Antoine Colinet
CIBFX deployment strategy in the SPS and SPS North Area (I. Romera)
The consolidation of the obsolete Power Converter Controls (MUGEF) in the SPS TLs with modern FGC controls in LS2 required the development of a new interface to merge interlocks to the BIS. In LS2, SY-EPC developed a custom interface, the so-called EPIC CIBU, that is currently deployed in the SPS TLs. In 2022, TE-MPE accepted the responsibility to develop a 10-input optical fibre user interface (CIFBX) to concentrate Power Converter interlocks to the BIS that will be available in LS3 (see presentation at the 18th CTTB meeting). The new hardware is based on the functional requirements provided by SY-EPC (EDMS 2724151).
Since LS2 there are 23 EPIC devices to concentrate the Power Converter connections to 9 BIS CIBU interfaces in the SPS. During LS3, these EPIC devices (and all MUGEF circuits with FEI connections) will need to be migrated to CIBFXs requiring at least 38 CIBFX devices. In addition, the SPS NA consolidation will require the installation of 20 CIBFXs.
The Beam Interlock System receives interlocks from a wide variety of systems (Collimators, Vacuum, Power Converters and Beam Loss Monitors, among others) deployed in the whole accelerator complex. The interface between the User Systems and the Beam Interlock Controllers is made through a standard interface (CIBU). The responsibilities between TE-MPE and the Users are well defined:
- TE-MPE is responsible for the development and maintenance of the User Interfaces
- TE-MPE is responsible for the cabling between the BIS and the User Interfaces
- The responsibility for the cabling between the User Interfaces and the User Systems relies on the Users
- User Interfaces are typically installed in the Users’ rack due to some electrical limitations
The CIBFX serves to interface up to 10 User Systems (typically Power Converters but some other groups expressed their interest in using it). The responsibilities for cabling, rack space allocation and enabling/disabling interlocks were discussed at the meeting.
TE-MPE proposes to be responsible for the development and maintenance of the CIBFX. In addition, TE-MPE will provide full integration of the CIBFX controls/diagnostics within the BIS v2 controls. Agreed by SY-EPC
TE-MPE proposes to be responsible for the fibres between the BIS and CIBFX. Agreed by SY-EPC
TE-MPE proposes to install the CIBFX in the users’ rack for several reasons (i.e. optimise cable lengths, reuse present infrastructure if existing, etc). SY-EPC argued that 3 scenarios need to be considered:
- In case of new installations (e.g. the SPS North Area) where no BIS exists yet: a new rack will be installed to host all CIBFXs (e.g. in BA80). TE-MPE will be responsible of the rack where the CIBFXs will be installed.
- In case of existing installations where EPIC CIBUs need to be replaced by CIBFXs. The CIBFXs will be installed in the existing racks, under the responsibility of SY-EPC, to reuse as much as possible the existing infrastructure.
- In case of existing installations where old MUGEF controls need to be consolidated and the CIBU replaced by a CIBFX: It will be studied case by case in order to determine if a new rack is needed or not.
TE-MPE proposes that the responsibility of the cables between the CIBFX and the User Systems (e.g. Power Converters) relies on the Users for various reasons (i.e. safety concerns, connectors convention, expertise, reusability of present cabling, etc). During the discussion, David did not agree with the safety concerns as many other cables are connected to the power converters, however he did accept that the issue of connector standardisation should be examined. David suggested that the new CIBFX is an opportunity to review the responsibilities for this connection. However during the discussion, a consensus was not reached on changing the existing paradigm and David suggested that if no agreement could be reached, SY-EPC would probably need to accept to organise the cable installation. David indicated that this proposal would be discussed within EPC as it affects several stakeholders and he would come back by email within a week.
TE-MPE is planning to equip the CIBFX with key switches to offer the users the possibility to enable/disable inputs individually by turning a physical key. A clear procedure remains to be defined to validate the changes after EPC piquet interventions. One of the possibilities that was mentioned was to include CCC operators in the validation process (e.g. modifying the reference database and performing interlock tests). TE-MPE will provide a reference database and the software tools to ensure that hardware interlocks match the reference database. SY-EPC is open to discuss this point and potentially include it in their piquet interventions.
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