4.1.7 Programable LEDs 36
5 Rear Panel 37
6 Boards and Modules 39
6.1 PCBs 39
6.2 Subassemblies 39
6.3 Main Processor Board 40
6.4 Power Supply Board 41
6.4.1 Watchdog 43
6.4.2 Rear Serial Port 44
6.5 Input Module - 1 Transformer Board 45
6.5.1 Input Module Circuit Description 46
6.5.2 Transformer Board 47
6.5.3 Input Board 48
6.6 Standard Output Relay Board 49
6.7 IRIG-B Board 50
6.8 Fibre Optic Board 51
6.9 Rear Communication Board 52
6.10 Ethernet Board 52
6.11 Redundant Ethernet Board 54
Chapter 4 Software Design 57
1 Chapter Overview 59
2 Sofware Design Overview 60
3 System Level Software 61
3.1 Real Time Operating System 61
3.2 System Services Software 61
3.3 Self-Diagnostic Software 61
3.4 Startup Self-Testing 61
3.4.1 System Boot 61
3.4.2 System Level Software Initialisation 62
3.4.3 Platform Software Initialisation and Monitoring 62
3.5 Continuous Self-Testing 62
4 Platform Software 63
4.1 Record Logging 63
4.2 Settings Database 63
4.3 Interfaces 63
5 Protection and Control Functions 64
5.1 Acquisition of Samples 64
5.2 Frequency Tracking 64
5.3 Direct Use of Sample Values 64
5.4 Fourier Signal Processing 64
5.5 Programmable Scheme Logic 65
5.6 Event Recording 66
5.7 Disturbance Recorder 66
5.8 Fault Locator 66
5.9 Function Key Interface 66
Chapter 5 Configuration 67
1 Chapter Overview 69
2 Settings Application Software 70
3 Using the HMI Panel 71
3.1 Navigating the HMI Panel 72
3.2 Getting Started 72
3.3 Default Display 73
3.4 Default Display Navigation 74
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