Woodward 721 - Page 26

721DSC for Marine Propulsion Application Manual 26004
Woodward
22
WARNING
The number of gear teeth is used by the control to convert pulses from the
speed sensing device to engine rpm. To prevent possible serious injury
from an overspeeding engine, make sure the control is properly
programmed to convert the gear-tooth count into engine rpm. Improper
conversion could cause engine overspeed.
CAUTION
Never set Max Hz to a value over 125% of the frequency at Raise Limit.
Otherwise the 721 control may not control the engine.
7. Normal Opn Minr Alm Ry
This set point determines the operating mode of Minor Alarm relay. Set the set point to
“TRUE” if this relay is used as normally open. Set the set point to “FALSE” if this relay
is normally closed. If it was set to “TRUE”, the relay will be closed when a minor alarm
happens.
8. Normal Opn Mjr Alm Ry
This set point determines the operating mode of Major Alarm relay. Set the set point to
“TRUE” if this relay is used as normally open. Set the set point to “FALSE” if this relay
is normally closed. If it was set to “TRUE”, the relay will be closed when a major alarm
happens.