Engineering data collection

• NSSC-I acts as single point contact for DF-224/SSM, collecting and forwarding engineering data for all SIs.

  • Small quantity of engineering data (RIU direct) bypasses NSSC-I
  • NSSC-I can provide an additional level of subcommutation to the data
  • Software variables can be collected as telemetry

• NSSC-I maintains a current value table in memory of all the SI engineering data.

  • This table is accessible to the SI specific application processors

• NSSC-I can maintain a table of up to 35 more parameters for each SI, which do not appear in the engineering telemetry

  • This table is also accessible to the SI specific applications processors
  • Used like the PITs, provides communication between SI computers and NSSC-I

• NSSC-I can maintain a table of up to 32 parameters per SI which are checked against allowable limits

  • This table is accessible to the SI specific applications processors
  • This table is typically used to provide SI health and safety checks, NSSC-I can respond to an out of limits by safing and/or error message

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