Siemens SIMOREG DC Master 6RA7028-6DS22 Operating Instructions Manual page 264

1 2
PI-controller
9
268
U534 (1)
.09
K
Filter time
U535.09 (0 ms)
K9380
T1
U530 (0)
.09
K
Enable PI-controller
U531 (0)
.09 0 = disable PI-controller <1>
B
.19 1 = freeze I component <5>
B
.29
1 = freeze output <3>
B
1 = freeze I comp. in pos. direction <6>
.39
B
.49 1 = freeze I comp. in neg. direction <7>
B
Set PI-controller
U532 (0)
.09 1 = set I component <4>
B
.19 1 = set output <2>
B
U533 (0)
.09 setting value for I component
K
.19 setting value for PI-controller output
K
3 4
U538 (1)
.09
K
U536 (1)
.09
K
U537.09 U539.09
(3,00) (3,000 s)
PI-controller
Kp Tn
1
Kp
0
X 0
Y
1 1
sTn
0 0
U540.09 (1) U541.09 (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)
.09
K
U543.09
(100,0)
P component
K9381
I component
-1
K9382 *
K9383
Stop I component in
pos.direction and limit
it to positive limit
(K9385)
Stop I component in
neg.direction and limit
it to negative limit
(K9387)
U545.09
(100,0)
U544 (9386)
.09
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
K9386
Positive limit
K9385
Controller at pos.
output limit
B9668
PI-controller output
K9384
B9678
Controller at neg.
output limit
1
B9658
Controller at
output limit
K9387
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
- B188 -