IMO VXSM75-1 Instruction Manual page 62

restart is made after completion of operation
preparation of the inverter (about 0.2 to 0.5 s).
H14 Auto-restart(Frequency fall rate)
•
This function determines the drop ratio of the
output frequency for the synchronization
between the output frequency of the inverter
and the motor speed, that is, the speed of
synchronization. This function is also used to
drop the frequency as a stall prevention
function for an excessive load during regular
operation.
Setting range: 0.00, 0.01 to 100.0 Hz/s
Set "0.00" to drop according to the currently
selected deceleration time.
Note) A large frequency drop ratio may cause
temporary increase in the regeneration
energy from the load, activating the
overvoltage protection function. On the
contrary, a small frequency drop ratio
may cause long operation time of the
current limit function, activating the
inverter overload protection function.
H20
PID control (Mode select)
to
H25
PID control (Feedback filter)
•
The PID control detects a control amount
(feedback value) from the sensor of the
controlled object and compares it with the
reference value (set temperature, etc.). Upon
difference between them, an action is taken
to reduce the difference. That is, this control
method makes the feedback value become
consistent with the reference value. This
method can be applied to flow control,
pressure control, temperature control and
other process controls.
Selecting Functions
•
Because forward and reverse operation can
be selected for the output of the PID
controller, the rpm of the motor can be
increased or decreased in relation to the
output of the PID controller.
H20
Setting 0: Inactive
1: Normal operation
2: Inverse operation
•
The reference value can be given at F01
"Frequency command 1" or directly input from
the keypad panel.
Select an arbitrary terminal from E01 "X1
terminal (Function selection)" through E05
"X5 (Function selection), and set data "9"
(frequency command 2 / frequency command
1).
To obtain the reference value from F01
"Frequency command 1", input an OFF signal
to the selected terminal. When inputting
directly from the keypad panel, turn the
selected terminal on.
•
The process amount of the reference value
and feedback value can be displayed based
on the setting at E40 "Display coefficient A"
and E41 "Display coefficient B".
Display coefficient A
Display coefficient B
0 100%
100% reference value
feedback value
5-33