7. Description of Operation of the
Control Subsystem
7.1 Operational Characteristics ................................................................................. 7-2
7.2 Control Unit ......................................................................................................... 7-3
7.2.1 Elements of the Control Subsystem .................................................................... 7-6
7.2.2 Inputting Data to the Control Unit ........................................................................ 7-7
7.2.2.a Inputs through Communications ......................................................................... 7-7
7.2.2.b Inputs from the Protection Subsystem ................................................................ 7-8
7.2.2.c Physical Inputs .................................................................................................... 7-8
7.2.2.d HMI Inputs (control HMI) ..................................................................................... 7-9
7.2.3 Outputting Data from the Control Unit ................................................................. 7-9
7.2.3.a Outputs through Communications ...................................................................... 7-9
7.2.3.b Signals sent to the Protection Subsystem .......................................................... 7-9
7.2.3.c Physical Outputs ............................................................................................... 7-10
7.2.3.d HMI Outputs (control HMI) ................................................................................ 7-10
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