Interlock DCS Options for System Test Setup Nicola

Interlock / DCS Options for System Test Setup Nicola Pacifico – Internal discussion 20. 12. 2018

Systems available / under development so far • IBL Interlock System (SR 1) based on custom CPLD board with “plug-in boards” • Legacy system with limited update possibilities • Labview based systems in some institutes (where? ) • Raspberry PI developments in some institutes (where? ) • Others… ?

Requirements • Should be produced in series: one system per testing site (OB ~ 15, IB ? Strip? ). • The interlock matrix should be highly reliable: testing of ~150 k. CHF structures, failure not acceptable. • Should allow DCS data export, to production databases or at least to text files (that could then be post-processed for database upload). • Should be relatively cost-effective. • What’s a reasonable budget per system? 2 k. EUR? 5 k. EUR? 10 k. EUR? ) • Should be maintenance-free (e. g. industrial) or support shall be guaranteed over the lifetime of the system (i. e. %FTE allocated to maintenance of all systems) • Hardware requirements: • • • Temperature sensors ([O]=30) Digital inputs for switches ([O]=10) Analog inputs for pressure sensors ([O]=5) Analog inputs for light sensors ([O]=2) Other analog inputs for voltages/current monitoring ([O]=10) Digital outputs to power supplies ([O]=10)

PRO/Cons • Custom DCS (with CPLD / Microcontrollers) • • PROs: can be adapted as required, possibly cost effective CONs: Would require new PCB designs, software developments and should be tested extensively before deployment, continued support. Cost ~ 2 k. EUR / system • Labview based • • PROs: easy to implement, can be made reliable (but requires good programming, a mis-managed array can slow down the loops considerably), can be standardized, post-production support not crtical. CONs: Required hardware (c. DAQ? PXI? ) can have considerable costs Cost ~ 10 k. EUR / system • Raspberry PI based • • PROs: probably most cost-effective solution CONs: Would require PCB design and testing, not Real Time system, SD cards are prone to failure, which makes it unsuitable for mission critical systems, continued support Cost ~ 1 k. EUR / system • PLC based • • PROs: Industrial standard, highly reliable by design, doesn’t require post-production support (commercial solution) CONs: moderate cost, Win. CC licensing. Cost ~ 5 k. EUR / system

Choice parameters • Funds availability • What’s the maximum cost/system that the community can afford? • If sufficient funds available, PLC/Lab. VIEW best solution. • Manpower availability • Custom systems will require manpower for their design and production and later support through all the production phase. Who can / is willing to commit to this? • If manpower can be committed (1 FTE for 6 months of development + 0. 5 FTE for continuing support until delivery of the last unit), a custom DCS/IM (CPLD / u. Controller) is a viable solution.