Basler Electric DECS-250N - Manual (Page 119)

9440500990 Rev D 103
DECS-250N Stability Tuning
Figure 99. PID Calculator
A Kp – Proportional Gain: Read-only, calculated gain value.
B Ki – Integral Gain: Read-only, calculated gain value.
C Kd – Derivative Gain: Read-only, calculated gain value.
D T’do – Gen. Time Constant: Select a value within the range of 1 to 15 seconds.
E Te – Exciter Time Constant: Select a value within the range of 0.04 to 1.0 seconds.
F Use Default Exciter Time Constant: Select or deselect.
G Td – Derivative Time Constant: Adjustable from 0 to 1 in 0.01 increments.
H Ka – Voltage Regulator Gain: Adjustable from 0 to 1 in 0.001 increments.
I Apply Gain Parameters Button: Click button to apply gain parameters.
J Close Button: Click button to close PID calculator.
K Generator Information: Enter up to 30 alphanumeric characters.
L Add Record: Adds a PID record.
M Remove Record: Removes a PID record.
Auto Tuning
During commissioning, excitation system parameters may not be known. These unknown variables
traditionally cause the commissioning process to consume large amounts of time and fuel. With the
development of auto tuning, the excitation system parameters are now automatically identified and the
PID gains are calculated using well-developed algorithms. Automatically tuning the PID controller greatly
reduces commissioning time and cost. The auto tuning function is accessed by clicking the Auto Tune
button (Figure 98, Locator H). BESTCOMSPlus must be in Live Mode in order to begin the auto tuning
process. The auto tuning window (Figure 100) provides options for choosing the PID Design Mode
A and
the Power Input Mode B . When the desired settings are selected, the Start Auto Tune C button is clicked to
start the process. After the process is complete, click the Save PID Gains (Primary) D button to save the
data.