LG C Series - Manual (Page 83)

Chapter 10. Advanced functions
10.4 3-Wire Operation
Group LED display Parameter name
Set
value
Min/Max
range
Factory
defaults
Unit
I20
[Multi-function input
terminal P1 define]
0 2
~ ~
I/O group
I24
[Multi-function input
terminal P5 define]
17
0/24
4
ƒ Select the terminal among P1 thru P5 for use as 3-Wire operation.
ƒ If P5 is selected, set I24 to 17 {3-Wire operation}.
P1
P2
P5
CM
FX : I20 = 0
RX : I21 = 1
3-Wire : I24 = 17
FX
RX
Frequency
P5 (3-Wire)
t

If both 3-Wire and Up-Down operation are selected, the former will be ignored.

The bandwidth of pulse (t) should be above 50msec.

Speed search operation is valid even in the case of LVT (low voltage trip) following instant power
failure.
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