Toshiba TOSVERT VF-nC3 Instruction Manual page 140

7) PID control forward/reverse characteristic switch
PID input characteristics can be reversed.
Process quantity
When characteristic is reversed according to parameters
When PID calculation reverse selection parameter  is 1: Set reverse characteristics.
When characteristic is reversed using contact input terminal
6
Input terminal function 54/55: Assign to switch PID characteristics.
(Caution) If reverse characteristics is selected for parameter  and terminal input at the same time,
−
Feedback amount
they become forward characteristic.
Opposite characteristic
×(-1)
Original characteristic
Characteristic selection (parameter or terminal input)
F-36
E6581595
Output
PID