Fuji Electric Frenic-Mini - 4.8 PID Frequency Command Generator

4-16
4.8 PID Frequency Command Generator
+
+
+
+ +
0 1
2 3 4
+
+
+
0,2 1,3
0,2
1,3
PID Control
(Remote
command SV)
+
-
0 1 2 3 0 3 5 0 1 2 3 5
+
+
+
+
*2
0
4
1
0,1,2
4 5 6
0 1,2
*2
1 2
*2
E48
C33
H26
C38
H27
C32 C34 F18 C50
C37 C39 F18 C50
F18 C50
F01
E60 E61 E62
C34C32
C39
C37
C39
C37
C34C32
C52C51
C52C51
S01
S05
y99
H30
S13
C08
J06
J02
J01
J05 J04 J03
C01 C02 C03 C04
C05 C06 C07
F15
F16
C51 C52
×
×
×
×
×
×
×
H61
7
Slow flowrate
stop
processing
J17 J16
J15
J23 J24
0 Hz
3
C12 C16
+
×
+
Alarm
0
1
H26
2
Block Diagram for Drive Frequency Command Generator
Switch
Normal/Inverse
Operation
(IVS)
Cancel PID Control
(Hz/PID)
Hold PID Integral Component
(PID-HLD)
Reset PID Integral and
Differential Components
(PID-RST)
UP/DOWN Control (Initial frequency setting)
UP/
DOWN
Control
UP/
DOWN
Control
UP (Increase
output frequency)
UP
DOWN (Decrease
output frequency)
DOWN
Motor overheat detected by thermistor THM
PID Control
(Feedback filter)
PID Control
(Mode selection)
D (Differential time) PID Control P (Gain) I (Integral time)
(Initiation frequency) PID Control (Operation level for slow flowrate stop) (Elapsed time from slow flowrate stop) (Initiation deviation level for slow flowrate stop) (Start latency time for slow flowrate stop)
Figure 4.7 PID Frequency Command Generator