Toshiba TOSVERT VF-S15 Instruction Manual page 14

[Example of system]
Power supply
Process value
0 to 10Vdc
Feedback value
4 to 20mA
[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 pressure feedback value and pressure process value into frequency.
Actual output frequency is, regardless of the converted frequency, the output frequency as a result
of PID control.
<Note>
Input process value needs to be less than maximum feedback value.
If the process value is 2 atm=10V (60Hz), the deviation becomes zero when the feedback value
reaches 2 atm=20mA (60Hz). The output frequency is fixed even though actual output becomes
even more higher, because the feedback value will not exceed over 20mA (60Hz).
Inverter
R/L1
S/L2
T/L3
VIB
CC
VIC
Feedback value
(Converted frequency)
60Hz
0Hz
4mA 20mA
Feedback value
(4-20mA)
4
8
12
16
20
13
U/T1
V/T2
W/T3
Process value
2 atm
1.5 atm
1 atm
10V
0V
Process value
(0-10V)
0
2.5
5.0
7.5
10
E6581879
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