Set To Suit The Motor; Set To Suit The System; Set If Necessary; Switch Pid Characteristic - Toshiba TOSVERT VF-S15 Instruction Manual

4.2. Set to suit the motor

Set only the parameters necessary for the motors.
These parameters are valid for actual output frequency as a result of PID control.
Title Function
fh Maximum frequency
Upper limit frequency
ul
Lower limit frequency
ll
f270 to
Jump frequency
f275
1 to 3
Starting frequency
f240
f241 Operation starting
frequency
Note) Note that the inverter may run and stop frequently when setting large value for f241.

4.3. Set to suit the system

4.3.1. Set if necessary

Set the following parameters if necessary.
Title Function
f367 Process upper limit
f368
Process lower limit
4.3.2. Switch PID characteristics
You can set and switch the PID forward / reverse characteristics.
It is useful for process type PID control including hot / cool switching of temperature control.
Title Function
PID forward /reverse
f380
characteristics
selection
[Input terminal function]
Positive Negative
logic logic
PID characteristics
54 55
switching
1) Set the maximum frequency of the output frequency.
2) This is the basis of the acceleration time (acc) and
deceleration time (dec).
Acceleration time (acc): time from 0Hz to fh.
Deceleration time (dec): time from fh to 0Hz.
This is the upper limit of output frequency.
This is the lower limit of output frequency.
Set the jump frequency to avoid (jump) resonance of the
machinery.
1) The inverter outputs frequency of f240 immediately.
2) It is useful for quick response of starting torque.
The inverter operates (Run/Stop) by f241 setting frequency
1) This is upper limit of process value.
2) If the process value exceeds the upper limit of
feedback value, the output frequency is fixed. (Refer to
4.2.1 for details.)
Set the upper limit of process value when it is difficult to
adjust by the input level of process value.
This is lower limit of process value.
You can select the PID forward / reverse characteristics.
You can switch the characteristics of process value and
feedback value by the input signal.
Function
Switch the PID forward / reverse characteristics of
the process value and the feedback value.
16
Description
Description
Description
Description (Positive logic)
E6581879