YASKAWA iQpump Series Programming Manual page 24

◆
b5 PI Function
The capability to accept an analog signal as feedback for a PI (Proportional + Integral) control function is built into the Drive.
Figure 1.21
Speed Command / PI Setpoint
D1-04
D1-02
b1-01
D1-01
Option Card
Serial Com
1 0
PI Differential
Fdbk. H3-09=16
Terminal A1
PI Setpoint
PI Feedback
Terminal A1
PI Differential
Fdbk. H3-09=16
0
Terminal A2
1
H3-09=B
The analog feedback to the iQpump drive for the PI control is via the A2 terminal. The iQpump drive must be programmed (H3-09 = "B:
PI Feedback") to use terminal A2 as feedback for the PI functionality of the Drive.
The PI setpoint can be configured to come from one of many different inputs or parameters.
originating the PI setpoint.
24
Frequency Reference
using multi-step
command
4
Frequency reference
(U1-01)
3
Scaling
PI SFS cancel
2
H1-xx=34 P1-03
1
1
0
PI SFS
b5-17
PI Set Point
(U1-38)
PI Differential
Fdbk. H3-09=16
PI SFS cancel
H1-xx=34
1
0
PI SFS
0
b5-17
1
PI Feedback
(U1-24)
1 0
+
1
-
0
PI Differential
Fdbk. H3-09=16
Figure 21 PI Block Diagram
b5-01=0
b5-01=3
OFF
b5-01=1
ON
PI control is OFF under the following
conditions:
- b5-01=0
- H3-xx=19 and the terminal status is
H1
ON
PI Input
(U1-36)
Scaling
PI output monitor
(U1-37)
PI Input
Characteristic
Caracteristic
I - limit
I-time
H1-xx=35
b5-03
0
0
+ +
P
1/t
+
-
1
Z
-1 Proportional
1
gain
Integral Hold
b5-02
H1-xx=31
Scaling
H3-09=16
+
+
0 1
PI Differential
Fdbk. H3-09=16
PI offset
(b5-07)
Upper limit
Fmax x109%
+
+
Lower limit 0
P1-06
Minimum
Pump Speed
PI delay time
b5-04
b5-08
0
+ +
1/t
1
Z
PI Limit
PI Output
Z
-1 b5-06
Integral Reset
Characteristic
H1-xx=30
b5-09
PI Differential
Fdbk. H3-09=16
Table 1 on page 25
YASKAWA TM.iQp.02 iQpump Drive Programming Manual
Output
frequency
SFS
PI Output
Gain
0
+
b5-10
+
-1
1
1 0
b5-07
PI offset
describes the options for