Bardac PLX, Руководство по эксплуатации продукта

Страница: 63 / 235

C H A N GE PARA METERS 6 3
6.1.8 C ALIBRA TIO N / Max tacho vo l ts PIN 8
Mu
l t i p l y the output vo l ts per rev va l ue for the tacho by the fu ll speed rpm of the tacho
e. g. 1 tacho rat i ng = 0.0 6 V per rev, 1 0 0 % speed of tacho = 5 0 0 rpm, then tacho sca li ng = 3 0.0 0 V
e. g. 2 tacho rat i ng = 0.0 9 V per rev, 1 0 0 % speed of tacho = 2 0 0 0 rpm, then tacho sca li ng = 1 8 0.0 0 V
A l ternat i ve l y, for systems N O T emp l oy i ng f i e l d w eaken i ng, run the system i n A V F at des i red fu ll speed and
mon i tor the tacho vo l ts. See 7.1.7 SPEED LO OP M O NIT OR / Tachogenerator vo l ts mon i tor PIN 1 2 9, then
after enter i ng the observed fu ll speed tacho vo l ts, convert to tacho feedback. See 3.4.4 A na l ogue
tachogenerator i nput, a l so 6.1.9 C ALIBR A TIO N / Speed feedback type PIN 9 Q UIC K ST ART.
The s
i gn of the parameter shou l d correspond to the s i gn of the tacho vo l ts for pos i t i ve speed demand.
For tacho vo
l ts w h i ch exceed 2 0 0 V fu ll sca l e, i t i s necessary to prov i de an externa l res i stor dropper net w ork
as fo ll o w s.
The net w ork sho w n w
ill a ll o w fu ll sca l e vo l tages up to 4 0 0 V o l ts. The number scro ll ed i n the w i ndo w shou l d
be set to ha l f the fu ll sca l e tacho vo l ts. A ppropr i ate measures must be taken to d i ss i pate the heat from the
dropper res i stors. The tota l po w er i n w atts d i ss i pated w ill be (Tacho s i gna l vo l ts) 2 / 2 0,0 0 0.
There
i s a tacho fa il ure detect i on system that may be conf i gured to e i ther tr i p the dr i ve, or automat i ca ll y
s w i tch to A V F. See 8.1.1 M O T OR DRIV E AL ARMS / Speed feedback m i smatch tr i p enab l e PIN 1 7 1.
See a
l so 3.4.4 A na l ogue tachogenerator i nput.
1 0 K
5 W
1 0 K
5 W
Tacho
s i gna l
Term i na l 2 6
T A C H O
Term i na l 2 5
0 V
Res i stor
Res i stor
C ALIBRA TIO N 3
8)M A X T A C H O V OLTS 8)M A X T A C H O V OLTS
6 0.0 0 V
PAR A ME TER RA N GE DEF A ULT PIN
M A X T A C H O V OLTS + /-2 0 0.0 0 vo l ts 6 0.0 0 V 8
Sca l es the tacho i nput for fu ll
feedback vo l ts at 1 0 0 % speed
R R