Schneider Electric ALTIVAR 58 TRX Guía de instalación descargar pdf (Pagina 67)

VVDED397047USR6/03 Chapter 2—Menus

06/2003 5—I/O Menu

and the -Speed input decreases the speed. If logic inputs are

assigned to +Speed/-Speed, the Str parameter appears in the

4—Control menu allowing the reference speed to be saved (see

page 56).

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.

In both types of operations, 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.

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

ATV 58 TRX terminal

max. speed reference

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 125 126

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Schneider Electric ALTIVAR 58 TRX Guía de instalación Pagina 67