ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart1 Embedded Local Monitor Board ELMB  Context  Aim  Requirements  Add-ons  Our aims of PRR

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart2 DCS Architecture SCX1 USA15 Front-End System Back-End System Local Area Network Partition 3 Supervisory only Partition m UX15 Partition 2 Common Infrastructure Local Control Stations (LCS) Partition 1 Expert Workstations ServerOperation Subdetector 1Subdetector 2a Subdetector n Detector Sub-system Sensors Actuators Fieldbus 200m  ELMB Electronic Rack ELMB Rack PC Power Supply Cooling Interlock Box Test Rack PC ELMB Alarms CFS HV Barrel

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart3 Components of DCS  SCADA Commercial system PVSS from company ETM  Front-End I/O Complex, computer-based Front-End systems (e.g. High/Low Voltage systems, crates) (Soft-) PLCs (e.g. gas mixing) Fieldbus nodes built into commercial devices (e.g. crates, power supplies) Commercial Fieldbus nodes (e.g. “Wago”) Purpose-built Fieldbus nodes (e.g. TileCal HT) General-purpose I/O Fieldbus node ELMB

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart4 General Purpose Front- end I/O System

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart5 Reasons for general purpose I/O  Homogenous solution for all subdetectors Save design effort (HW and SW) Common radiation qualification Savings in production costs Ease integration into SCADA Ease Maintenance Common spares  Special technical requirements

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart6 Environment of ELMB  Radiation neutrons/cm 2 and 1Gy per year outside of the calorimeters:  Radiation neutrons/cm 2 and 1Gy per year outside of the calorimeters: components, SEE  Magnetic field up to 1.5 T:  Magnetic field up to 1.5 T: no coils, DC-DC  High number channels: low  High number channels: low cost  Limited space available:  Limited space available: high density  Access restriction:  Access restriction: high reliability, rem. diagnostics  I/O points distributed over the whole volume of the detector:  I/O points distributed over the whole volume of the detector: distances > 100m  Remote powering:  Remote powering: low power consumption ==> no industrial solution exists no industrial solution exists <==

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart7 Requirements of ELMB  Radiation tolerance  Operability in magnetic field  High density  Low power consumption  Low cost  High reliability  Remote diagnostics  Distributed  In-system-programmability  In-system-programmability (firmware upgrade)  Interface industry standard: CAN chosen  Modular: standard specialized usage

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart8 Choice of CAN  CANbus HW good support of chips from industry electrical robustness commercial diagnostic tools error detection and recovery  CANopen SW standardized connection to SCADA NMT and error handling

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart9 Modularity of ELMB (1)  Standard usage HW features on-board: 64 channel ADC 16 bit digital input and output ports HW features off-board: general purpose motherboard (connect sensors and CANbus) with signal adapters DAC 16 channel 12 bit (max. 4 per ELMB) (NIKHEF) Interlock box 16 channels, thresholds set by resistor network (Wuppertal) SW features Support of standard HW devices Error detection and correction CANopen protocol handling

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart10 Modularity of ELMB (2)  Specialized usage HW features on-board: SPI bus interrupts low-grade ADC Specialized motherboard: subdetector F-E electronics Common SW CANopen master-slave interaction user provided SW: libraries for special usage of output ports (JTAG, I2C) applications for special HW devices (e.g. HV units) control and feedback loops (e.g. PID) dedicated analysis (e.g. gas flow)

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart11 Spectrum of usage  Type “Black Box” Configure HW of ELMB Configure SW of ELMB with SCADA Use data in SCADA (data points)  Type “Advanced usage” Design special HW signal adapters Add chips on SPI bus (e.g. SRAM, F-E chips) Write dedicated SW (e.g. initialise DAQ Front-End electronics, supervise HV unit)

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart12 General purpose motherboard (front side)

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart13 General purpose motherboard (back side)

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart14 Features DAC  16 channels 12 bit (max. 4 modules per ELMB)  controlled via SPI  opto-isolated output mA, max 2.5V, (powered from ELMB) mA, (external power supply)  performance ‘Integral non-linearity’: 0.5 or 1 LSB accuracy: 0.1% or 1%  speed: maximum 100 channel-updates/sec  output set by SDO or PDO  output values buffered on ELMB  estimated cost: 20 CHF per channel

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart15 Block Diagram DAC

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart16 Features Interlock Box  16 channels  thresholds set by resistors  independent from ELMB, connected in parallel  remote diagnostics  TTL output: too high, too low, error  same environment as ELMB radiation magnetic field  accuracy: 1 K for NTC 10k

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart17 Schematics Interlock Box

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart18 Picture Interlock Box

ATLAS DCS ELMB PRR, March 4th 2002, H.J.Burckhart19 DCS’ aim of this PRR  Confirmation, that ELMB is what ATLAS needs  (constructive) criticism  commitments from subdetector features ok quantity required time scale of need Pledges from users needed before Tender!