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RCU - Final Prototyping The local Slow Control

RCU - Final Prototyping The local Slow Control. Dedicated bus connection RCU FEC Board Controller Sharing the Altro readout backplane Monitoring status of all FECs Interrupt and Error handling. Carmen González Gutiérrez. RCU: functional overview. SIU Interface Module.

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RCU - Final Prototyping The local Slow Control

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  1. RCU - Final PrototypingThe local Slow Control • Dedicated bus connection RCU FEC Board Controller • Sharing the Altro readout backplane • Monitoring status of all FECs • Interrupt and Error handling Carmen González Gutiérrez

  2. RCU: functional overview SIU Interface Module Configuration Module Data Assembler Module 32 RCU Master Module 40 Readout Network RCU bus Slow Control Interface FECs Trigger Interface Module DCS Interface Module I2C protocol RCU

  3. I2C derived protocol • Serial Communication with 3 lines: • 2 unidirectional serial data lines, SDA • serial clock, SCL • Interrupt line • Frequency of SCL: 5 MHz RCU Slow Control Interface Master FEC Slow Control Interface Slave SCL SDA_in SDA_out Interrupt

  4. Local Slow Control operations • Configure the power state of all FECs • Monitor voltages, currents and temperature • Interrupt handling in case of : • Temperature or currents over thresholds • Voltages under threshold • Power supply errors • Missed sclk • Protocol error • Read status parameters: • L1, L2 counters • sclk counter • dstb counter

  5. Readout with Slow Control interrupt Master: DDL or DCS Slow Control Interface Master FECs sda_in scl sda_out Active Front End Card List I2C protocol Normal mode: Readout of Temperature, Voltages and Currents Case of Interrupt: take decision (up to Switch off) the card who asserted the line

  6. Example of readout values for 1 crate

  7. Average values in 7 hours

  8. Temperature Maximum Temperature Threshold = 40 º C

  9. AnalogVoltage Minimum Analog Voltage Threshold = 3.63 V

  10. AnalogCurrent Maximum Analog Current Threshold = 750 mA

  11. DigitalVoltage Minimum Digital Voltage Threshold = 2.82 V

  12. DigitalCurrent Maximum Digital Current Threshold = 1.91 A

  13. Summary • The local Slow Control is able to: • Monitor Temperatures, Voltages and Currents from the FEC’s • Read status parameters and counters • Configure the power state of the FEC’s • Switch off the card in case of Interrupt

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