Specifications

Altivar
®
31 Adjustable Speed AC Drives
Functions
39
4/2005
© 2004–2005 Schneider Electric All Rights Reserved
Double action buttons
Only one logic input, assigned to +speed, is required for double action
buttons. Double action buttons typically have two detents. Press the button to
the first detent to maintain speed; press it to the second detent to increase
speed. Each action closes a contact. Refer to the following table.
This type of +/- Speed is incompatible with three-wire control.
The maximum speed is set by HSP.
Save reference
This function, associated with +/- Speed control, enables the drive to save
and read the last speed reference. If the run signal or mains supply is lost,
the drive applies the saved reference at the next run signal.
Jog operation
The jog function permits pulse operation with minimum ramp times (0.1 s),
limited speed reference, and minimum time between two pulses. It is enabled
using a logic input, with pulses given by the rotation direction command.
This function is suited to machines with product insertion in manual mode
(for example, gradual movement of the mechanism during maintenance
operations).
Button
Released
(-speed)
Press to 1
st
detent
(speed maintained)
Press to 2
nd
detent
(+speed)
Forward
— a a and b
Reverse
— c c and d
LI1
ac
bd
LIx
LIy
ATV31 Control Terminals
+ 24
Example of wiring:
LI1: forward
LIx: reverse
LIy: +speed (USP)
8800CT0401_Double Action Button
aaa a a a a
bb
cc
d
Motor frequency
LSP
Forward
0
2nd press
1
st
press
Reverse
0
2
nd
press
1
st
press
0
LSP
8800CT0401_Plus Speed_Minus Speed.eps
1
0
1
0
f (Hz)
Forward
or
Reverse
Speed reference:
adjustable from 0 to 10 Hz
factory setting = 10 Hz
t
t
t
tm
Jog
tm: fixed time of 0.5 s,
minimum time between
two pulses
Example of jog operation
563543
.eps
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: [phone]-Outside Local Area: [phone]-www.stevenengineering.com