Siemens SIMOREG DC Master 6RA7028-6DS22 Operating Instructions Manual page 256

1 2
PI-controller
1
260
U534 (1)
.01
K
Filter time
U535.01 (0 ms)
K9300
T1
U530 (0)
.01
K
Enable PI-controller
U531 (0)
.01 0 = disable PI-controller <1>
B
.11
1 = freeze I component <5>
B
.21
1 = freeze output <3>
B
1 = freeze I comp. in pos. direction <6>
.31
B
.41 1 = freeze I comp. in neg. direction <7>
B
Set PI-controller
U532 (0)
.01 1 = set I component <4>
B
.11 1 = set output <2>
B
U533 (0)
.01 setting value for I component
K
.11 setting value for PI-controller output
K
3 4
U538 (1)
.01
K
U536 (1)
.01
K
U537.01 U539.01
(3,00) (3,000 s)
PI-controller
Kp Tn
1
Kp
0
X 0
Y
1 1
sTn
0 0
U540.01 (1) U541.01 (1)
0 = Reset I
0 = Reset P
component component
<1> disable PI-controller:
P component = 0
I component = 0
output = 0
<2> set output:
P component active
I component = setting value - P component
output = setting value
<3> freeze output:
P component active
I component = frozen output - P component
output is frozen
<4> set I component:
P component active
I component = setting value
output = P component + I component
5 6
U542 (1)
.01
K
U543.01
(100,0)
P component
K9301
I component
-1
K9302 *
K9303
Stop I component in
pos.direction and limit
it to positive limit
(K9305)
Stop I component in
neg.direction and limit
it to negative limit
(K9307)
U545.01
(100,0)
U544 (9306)
.01
K
<5> freeze I component:
P component active
I component is frozen
output = P component + I component
<6> freeze I component in pos. direction:
P component active
if controller input (X) is positive,
I component is frozen
output = P component + I component
<7> freeze I component in neg. direction:
P component active
if controller input (X) is negative,
I component is frozen
output = P component + I component
7
Transfer function:
1
G(s) = --------- * Kp * ---------
1 + sT1
K9306
Positive limit
K9305
Controller at pos.
output limit
B9660
PI-controller output
K9304
B9670
Controller at neg.
output limit
1
B9650
Controller at
output limit
K9307
Negative limit
Priority:
1. disable PI-controller
2. set output
3. freeze output
4. set I component
5. freeze I component
6. freeze I component in pos. direction
7. freeze I component in neg. direction
8
1 + sTn
sTn
- B180 -