LG SV-iS5 Instruction Manual page 130

Chapter 6 - Parameter Description [I/O]
[iTerm Clear]
This function is used for PID control. When this terminal
is ON, the accumulated value by I-Gain is set to ' 0' .
Refer to PID Control Block Diagram.
[Open-loop]
This is used to exchange the control mode of inverter
from PID mode (Close Loop) to V/F mode (Open Loop).
DRV-03 [Drive Mode] and DRV-04 [Frequency Mode]
are applied when the mode has been changed.
☞
Note: This function can be used only when the inverter is
stopped.
[Main-drive]
When an option board (like RS485, DeviceNet, F-Net) is
installed and used for the frequency setting and the
run/stop command, the inverter operation can be
changed to manual operation using this function without
changing parameters.
FU1-02 [Frequency Mode] and FU1-01 [Drive Mode] are
applied when the mode has been changed.
☞
Note: this function can be used only when the inverter is
stopped.
[Analog hold]
When there is an analog input signal for frequency
reference and ' Analog hold' terminal is ON, inverter fixes
its output frequency regardless of the frequency
reference change. The changed frequency reference is
applied when the terminal is OFF.
This function is useful when a system requires constant
speed after acceleration.
Reference Frequency,
Output frequency
P1-CM
ON
' Analog hold'
[Analog hold Operation]
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Related Functions:
Reference Frequency
Output Frequency
Time
Time
124
[XCEL stop]
Inverter stops accelerating and decelerating when this
terminal is ON.
[P Gain2]
This function is used to change P-Gain during PID
operation. When this terminal is ON, PID controller
changes P-Gain with PID P2-Gian set in FU2-59.
Refer to PID Control Block Diagram.
[SEQ-L, SEQ-M, SEQ-H]
These functions are used for Auto drive (I/O-50).
Five different sequences can be selected according to
the combination of these terminals. Eight step
frequencies, Accel/Decel time and steady speed time
can be set for each sequence. The following table shows
the sequence of selection.
Sequence # Parameter
Code
Sequence 1
Sequence 2
I/O-50 ~
Sequence 3
I/O-84
Sequence 4
Sequence 5
0: OFF, 1: ON
☞
Note: The inverter stops after finishing all steps of that
sequence once the Auto (Sequence) operation is started.
To stop the inverter during sequence operation, use ' BX'
terminal on the control terminal strip.
I/O-51 ~ I/O-84 [Sequence Operation]
[Manual]
This is used to exchange the operation mode of inverter
from Auto (Sequence) to manual operation.
DRV-03 [Drive Mode] and DRV-04 [Frequency Mode]
are applied when the mode has been changed.
☞
Note: This function can be used only when the inverter is
stopped.
[Go step]
This is used to trigger the next step in a sequence of
Auto-B operation.
Speed-H Speed-M Speed-L
(P3) (P2) (P1)
0 0 1
0 1 0
1 0 0
0 1 1
1 0 1