GE C30 Instruction Manual page 233

5 SETTINGS
Dp k  
Di k  
Dd k  
The PID regulator logic is shown below.
SETTING
Function:
Enabled = 1
SETTING
&
Blocked:
Off = 0
SETTING
Antiwindup:
Enabled = 1
SETTING
Process:
Setpoint:
Tracking:
GE Multilin
p k   p k 1  
= – –
K br k   y k     
br k 1
= – – – +
i k   p k 1  
= – –
KT

S
  AW w k 1   
---------- -
e k 1
= – + –

T
i
d k   d k 1  
= – –
T
d
   y k  
Dd k 1 ----------------------- -
= – +
T NT
+
d S
u>Tmin
SETTING
T , K, b,
s
T , T T , N,
i t d
run
 u
AW
PID
SETTING
max, min
u
Out=MAX(min,MIN(max,u))
ACTUAL VALUE
SETPOINT
Figure 5–44: PID REGULATOR LOGIC
C30 Controller System
  
y k 1
–
T

S
 v k 1   
------
– –

T
t
T KN
d
      
2y k 1 y k 2 ----------------------- -
– – + –
T NT
+
d
SETTING
Dead Time u>0
Tdead
&
|u| ms
u<0
5.6 CONTROL ELEMENTS
(EQ 5.3)
S
FLEXOPERAND
& PID 1 LOWER
FLEXOPERAND
& PID 1 RAISE
ACTUAL VALUE
PID 1 DELTA OUT
ACTUAL VALUE
PID 1 OUT
5-117
5