GE C30 Instruction Manual page 318

CONTROL ELEMENTS
where
y is the process signal
5
r is the setpoint signal
w is the tracking signal
u is the regulator output
K is the proportional gain
b is the setpoint weighting
T is the derivative time constant
d
N is the derivative limit
T is the integral time constant
i
T is the anti-windup time constant
t
s is the domain
In discrete form, the equations for the regulator are
where
T is the sampling time
S
AW is a flag which enables anti-windup
The incremental form of this equation is:
5-162
Figure 5-79: PID block diagram
CHAPTER 5: SETTINGS
C30 CONTROLLER SYSTEM – INSTRUCTION MANUAL
Eq. 5-1
Eq. 5-2