133
[1.7 APPLICATION FUNCT.]
(FUn-)
+/- speed
Two types of operation are available.
1.
1.
1.
1.
Use of single-press buttons: Two logic inputs are required in addition to the operating direction(s).
The input assigned to the “+ speed” command increases the speed, the input assigned to the “- speed” command decreases the speed.
2.
2.
2.
2.
Use of double-press buttons: Only one logic input assigned to “+ speed” is required.
+/- speed with double-press buttons:
Description: 1 button pressed twice (2 steps) for each direction of rotation. A contact closes each time the button is pressed.
Example of wiring:
LI1: forward
LIx: reverse
LIy: + speed
Do not use this +/-speed type with 3-wire control.
Whichever type of operation is selected, the max. speed is set by
[High speed]
(HSP)
(see page
35
).
Note:
If the reference is switched via rFC (see page
111
) from any one reference channel to another reference channel with “+/- speed”, the value
of reference rFr (after ramp) may be copied at the same time in accordance with the
[Copy channel 1 --> 2]
(COP)
parameter, see page
112
.
If the reference is switched via rFC (see page
111
) from one reference channel to any other reference channel with “+/- speed”, the value
of reference rFr (after ramp) is always copied at the same time.
This prevents the speed being incorrectly reset to zero when switching takes place.
Released (- speed)
1
st
press
(speed maintained)
2
nd
press
(faster)
Forward button
–
a
a and b
Reverse button
–
c
c and d
ER40 control
terminals
LI1 LIx LIy +24
a
b
c
d
a
a a
a
a
a
a
b
b
c
c
d
c
Motor frequency
LSP
Forward
0
2
st
press
1
st
press
Reverse
0
2
st
press
1
st
press
0
LSP
Содержание ER40-G
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