Woodward 505HT, Installation And Operation Manual

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Manual 35116 505HT for Pelton Turbines
Woodward 17
BLACK KEYS
Are soft-key functions that relate to the display indication located above them. They can be navigational
or operational. These items do not require “Focus”, they are always available on that particular screen.
Watchdog Timer/CPU Fault Control
The IO Lock and CPU Health LED’s on the front left side of the display – are always in an identical state
as the LED’s on the back side of the control. They are completely controlled by the 505 control hardware
and are not controlled by the GAP application.
A watchdog timer and CPU fault circuit monitors the operation of the microprocessor and microprocessor
memory. If the microprocessor fails to reset the timer within 15 milliseconds of the last reset, the CPU
fault-control will activate the reset output. This resets the CPU, de-energizes all relay outputs and turns
off all milliamp outputs.
Released