Toshiba TOSVERT VF-S15 Instruction Manual page 10

You need to convert the process value and the feedback value into frequency for the PID control.
f702 (Frequency free unit display magnification) and f703 (Frequency free unit coverage
selection) enable to set process value and feedback value easily. The functions convert frequency display
to temperature or pressure level by calculation.
Value displayed = Frequency displayed on the monitor or specified with a parameter × 
f703 = 0
Frequency on the monitor or specified with parameter is displayed by the value multiplied by .
Note) This setting does not change automatically if you switch from PID control to frequency
command operation. Output frequency is displayed by the value by .
f703 = 1
Frequency of the following parameters and the frequency on the monitor are displayed by the value
multiplied by 
[Parameters]
Title
fpid
Process input value of PID control
f367
Process upper limit
f368
Process lower limit
[FM/ pulse output and monitor display]
FM/ Pulse output
Option No. Communication No.
2
23
Function
Option No.
FD02 2
FD22 23
Monitor output
Communication No.
FE02
FE22
9
E6581879
Function
Frequency setting value
PID feedback value