Chapter 10. Advanced functions

10.4 3-Wire Operation

 

Group

 

 

LED display

 

 

Parameter name

 

 

Set

 

 

 

Min/Max

 

 

Factory

 

 

Unit

 

 

 

 

 

 

 

 

value

 

 

 

range

 

 

defaults

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I/O group

 

I20

 

[Multi-function

input

0

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

terminal P1 define]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

~

 

~

 

 

 

 

 

0/24

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I24

 

 

[Multi-function

input

 

17

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

terminal P5 define]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ƒSelect the terminal among P1 thru P5 for use as 3-Wire operation.

ƒIf P5 is selected, set I24 to 17 {3-Wire operation}.

P1

FX : I20

= 0

P2

RX : I21 = 1

P5

3-Wire :

I24 = 17

CM

 

 

Frequency

t

FX

RX

P5 (3-Wire)

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.

83

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Image 83
LG Electronics C Series manual 10.4 3-Wire Operation