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Cancel PID control -- Hz/PID
(Function code data = 20)
Turning this terminal command ON disables PID control.
If the PID control is disabled with this command, the inverter runs the motor with the
reference frequency manually set by any of the multistep frequency, keypad, analog input,
etc.
Hz/PID Function
OFF Enable PID control
ON Disable PID control/Enable manual settings
Switch normal/inverse operation -- IVS
(Function code data = 21)
This terminal command switches the output frequency control between normal (proportional
to the input value) and inverse and in manual frequency setting or under PID process control.
To select the inverse operation, turn the IVS ON.
The normal/inverse switching operation is useful for air-conditioners that require
switching between cooling and heating. In cooling, the speed of the fan moto
(output frequency of the inverter) is increased to lower the temperature. In heating,
it is reduced to lower the temperature
. This switching is realized by the IVS.
• When the inverter is driven by an external analog frequency command sources
(terminals [12] and [C1]):
Switching normal/inverse operation can apply only to the analog frequency command
sources (terminals [12] and [C1]) in frequency command 1 (F01) and does not affect
frequency command 2 (C30) or UP/DOWN control.
• When process control is performed by the PID processor integrated in the inverter:
The Hz/PID terminal command ("Cancel PID control") can switch PID control between
enabled (process is to be controlled by the PID processor) and disabled (process is to be
controlled by the manual frequency setting). In either case, the combination of the "PID
control" (J01) and the IVS terminal command determines the final operation as listed below.
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