GE C30 Instruction Manual page 228

5.6 CONTROL ELEMENTS
The PID regulator logic is shown below.
SETTING
Function:
Enabled = 1
SETTING
Blocked:
Off = 0
SETTING
5
Antiwindup:
Enabled = 1
SETTING
Process:
Setpoint:
Tracking:
5-104
Dp k   p k   p k 1  
= – –
K br k   y k    
br k 1
= – –
Di k   i k   p k 1  
= – –
KT

S
  AW w k 1 
---------- -
e k 1
= – +

T
i
Dd k   d k   d k 1  
= – –
T
d
 
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
u
Figure 5–41: PID REGULATOR LOGIC
C30 Controller System
   
y k 1
– + –
T

S
   v k 1   
------
– – –

T
t
 y k       
2y k 1 y k 2
+ – – + –
SETTING
Dead Time
Tdead
&
|u| ms
SETTING
max, min
Out=MAX(min,MIN(max,u))
ACTUAL VALUE
SETPOINT
5 SETTINGS
T KN
d
 
----------------------- -
T NT
+
d S
FLEXOPERAND
u>0
& PID 1 LOWER
FLEXOPERAND
& PID 1 RAISE
u<0
ACTUAL VALUE
PID 1 DELTA OUT
ACTUAL VALUE
PID 1 OUT
(EQ 5.3)
GE Multilin