This document appears to be a diagram or technical specifications for a water level control system. It includes labels for components like PID settings, filters, feedback values, limits, pumps, sensors and alarms. The system monitors and controls water levels, pressures and flows across different levels and responds to shortages or other changes.

2. bias
limit
PID0
PID1
M P
F
filter
feedback value
givenvalue
switching of
positive and
negative
sleep/
wake up
switching of
PID setting
amplitude
limiting

3. time
upper level limit
lower level limit
water
scarcity
water level change
20.0%
40.0%
60.0%
C
C
C
B B
B B
C
B
A A
A
A
A
B
A
A
C

4. ????
L1
L2
L3
R
S
T
U
V
W
+10V
AI1
GND
GND
AI2
PT
Pressure
presetting
Pressure feedback
CHV160A
RT8
RT7
RT6
RT5
RT4
RT3
RT2
RT1
(+) (–)
Forward
Coast to stop
Fault reset
Upper limit level of
receiving basin
water shortage level
Upper limit level of
sewage pool
S1
S2
S3
S4
S5
S6
S7
S8
COM
Main circuit
R01A
R01C
R02C
R02A
R03C
R03A
Inverter fault
Alarmof receiving
basin water shortage
Alarmof pipeline over
pressure and under pressure
Water
supply
card
KM0
KM1
FR1
M1
3~
KM2
KM3
FR2
M2
3~
FR3 M3
3~
FR4 M4
3~
FR5 M5
3~
KM4
KM5
KM6
Dredge pump
Dormant pump
Grid-frequency pump
Lower limit level of
sewage pool
Lower limit level of
receiving basin