Toshiba TOSVERT VF-PS1 Instruction Manual page 18

a)
Example of system
Power supply
Process value
0 ~ 10Vdc
Feedback value
4 ~ 20mA
b) Parameter setting
Feedback value
2 atm
1.5 atm
1 atm
4mA 20mA
Pressure
(atm)
1
1.25
1.5
1.75
2
Convert the feedback value and process value to frequency, and set each level.
Actual output frequency is different from these setting frequencies.
Note)
You need to input the process value less than maximum of feedback value.
For example, if you input the process value as 2 atm=10V(60Hz), the feedback value reaches
2 atm=20mA(60Hz) and deviation becomes zero. The feedback value can not exceed 20mA(60Hz)
even if the output becomes high level. Then output frequency is fixed.
.
Inverter
R/L1
S/L2
T/L3
RR/S4
CCA
VI/II
Feedback vale
(Converted frequency)
60Hz
0Hz
4mA 20mA
Feedback value
(4~20mA)
4
8
12
16
20
17
U/T1
V/T2
W/T3
Proces value
2 atm
1.5 atm
1 atm
10V
0V
Process value
(0~10V)
0
2.5
5.0
7.5
10
E6581329①
M
Pressure
sensor
P
Pump
1 to 2 atm
Process value
(Converted frequency)
60Hz
0Hz
10V
0V
Converted frequency
(Hz)
0
15
30
45
60