Manual 35018V1
505XT Digital Control System for Steam Turbines
Woodward
127
MAX TEMPERATURE DIFFERENCE FOR IDLE 1
dflt= 1500.0 (0.0, 1.0e+38)
Set the temperature difference that must be achieved for the automatic start sequence to continue
through the Idle 1 speed setpoint based on the difference between temperature analog inputs 1 and
2. If the difference between temperature input 1 and 2 is less than this value, the Idle 1 condition will
be satisfied. See the functional description in this manual for other conditions that may be required
for the automatic start sequence to continue from Idle 1.
TEMPERATURE 1 SETPOINT FOR IDLE 2
dflt= 1500.0 (0.0, 1.0e+38)
Set the temperature that must be reached for the automatic start sequence to continue through the
Idle 2 speed setpoint based on temperature analog input 1. Above this temperature, the Idle 2
condition will be satisfied for this temperature input. See the functional description in this manual for
other conditions that may be required for the automatic start sequence to continue through Idle 2.
TEMPERATURE 2 SETPOINT FOR IDLE 2
dflt= 1500.0 (0.0, 1.0e+38)
Set the temperature that must be reached for the automatic start sequence to continue through the
Idle 2 speed setpoint based on temperature analog input 2. Above this temperature, the Idle 2
condition will be satisfied for this temperature input. See the functional description in this manual for
other conditions that may be required for the automatic start sequence to continue through Idle 2.
MAX TEMPERATURE DIFFERENCE FOR IDLE 2
dflt= 10.0 (0.0, 1.0e+38)
Set the temperature difference that must be achieved for the automatic start sequence to continue
through the Idle 2 speed setpoint based on the difference between temperature analog inputs 1 and
2. If the difference between temperature input 1 and 2 is less than this value, the Idle 2 condition will
be satisfied. See the functional description in this manual for other conditions that may be required
for the automatic start sequence to continue through Idle 2.
TEMPERATURE 1 SETPOINT FOR IDLE 3
dflt= 1500.0 (0.0, 1.0e+38)
Set the temperature that must be reached for the automatic start sequence to continue through the
Idle 3 speed setpoint based on temperature analog input 1. Above this temperature, the Idle 3
condition will be satisfied for this temperature input. See the functional description in this manual for
other conditions that may be required for the automatic start sequence to continue through Idle 3.
TEMPERATURE 2 SETPOINT FOR IDLE 3
dflt= 1500.0 (0.0, 1.0e+38)
Set the temperature that must be reached for the automatic start sequence to continue through the
Idle 3 speed setpoint based on temperature analog input 2. Above this temperature, the Idle 3
condition will be satisfied for this temperature input. See the functional description in this manual for
other conditions that may be required for the automatic start sequence to continue through Idle 3.
MAX TEMPERATURE DIFFERENCE FOR IDLE 3
dflt= 10.0 (0.0, 1.0e+38)
Set the temperature difference that must be achieved for the automatic start sequence to continue
through the Idle 3 speed setpoint based on the difference between temperature analog inputs 1 and
2. If the difference between temperature input 1 and 2 is less than this value, the Idle 3 condition will
be satisfied. See the functional description in this manual for other conditions that may be required
for the automatic start sequence to continue through Idle 3.
RATE TO RATED SETPT—COLD (rpm/s)
dflt= 5.0 (0.01, 500)
Enter the cold start rate to the rated speed set point. This is the programmable rate, in rpm per
second, that the speed set point will accelerate at when moving to rated when a cold start is
determined.
RATE TO RATED SETPT—WARM (rpm/s)
dflt= 5.0 (0.01, 500)
Enter the warm start rate to the rated speed set point. This is the programmable rate, in rpm per
second, that the speed set point will accelerate at when moving to rated when a warm start is
determined. The warm condition is only available when using temperature analog inputs.
RATE TO RATED SETPT—HOT (rpm/s)
dflt= 5.0 (0.01, 500)
Enter the hot start rate to the rated speed set point. This is the programmable rate, in rpm per
second, that the speed set point will accelerate at when moving to rated when a hot start is
determined. If the turbine has been shutdown for longer than the Hot time but shorter than the Cold
time, the control will interpolate between the Hot and Cold rates to determine the acceleration rate to
the rated set point.
(Must be greater than or equal to the ‘Rate to Rated—Cold’ Setting)
RATED SETPOINT (rpm)
dflt= 3000 (0.0, 20000)
Enter the Rated Speed Setting. This is the final speed setting when using the automatic start
sequence. Once this speed set point is reached, the start sequence is complete.
(Must be greater than or equal to the ‘Minimum Governor’ Setting)