Schneider Electric Altivar 58 VW3-A58101 Uživatelský manuál Strana 58

  • Stažení
  • Přidat do mých příruček
  • Tisk
  • Strana
    / 112
  • Tabulka s obsahem
  • KNIHY
  • Hodnocené. / 5. Na základě hodnocení zákazníků
Zobrazit stránku 57
ALTIVAR
58 Keypad Display VVDED397047US R8/01
Chapter 2 Menus 08/01
58
© 19982001 Schneider Electric All Rights Reserved
+Speed/-Speed
There are two types of operation for +Speed/-Speed. In both, the
maximum speed is set by the reference speeds at the analog inputs. For
example, if 60 Hz is the desired maximum speed, a jumper can be
installed from +10 Vdc to AI1.
1. Use of pushbuttons. Two logic inputs are required in addition to the
run direction inputs. The +Speed input increases the speed and the
-Speed input decreases the speed. If logic inputs are assigned to
+Speed/-Speed, the Str parameter appears in the 4Control menu
allowing the reference speed to be saved (see page 48).
NOTE: When 3-wire control is selected, -Speed is automatically assigned
to the next input after the one assigned to +Speed.
2. Use of selector switches. Only one logic input, assigned to +Speed,
is required. When using selector switches, there is one position for
each rotation direction.
NOTE: This type of operation is not compatible with 3-wire control.
The Save Reference (Str) parameter can be used to save the last
speed reference when the run command is removed or when the
power is removed.
Figures 13 and 14 illustrate wiring and timing for +Speed/-Speed.
Figure 13: +Speed / -Speed Wiring Diagram
a b A B
LI1 LI2 LI3 LI4 +24 AIX
Activate input a or b,
then activate input A or B.
LI1: Forward
LI2: Reverse
LI3: +Speed
LI4: Speed
ATV58 terminal strip
max. speed reference
Zobrazit stránku 57
1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 111 112

Komentáře k této Příručce

Žádné komentáře