B&R ACOPOSinverter P84, User Manual

Page: 213 / 405

Programming guidelines
ACOPOSinverter P84 User's Manual 2.10 213
2.8.11.8 +/- speed
Two types of operation are available.
1. Use of single action pushbuttons: Two logic inputs are required in addition to rotational direction(s).
The input set to "+ speed" increases the speed, and the input set to "- speed" reduces the speed.
2. Use of dual action pushbuttons: Only one logic input, that is assigned to "+ speed", is required.
+/- speed with dual-action buttons:
Description: 1 button that can be pressed twice (2 steps) for each direction of rotation. A contact closes each time
the button is pressed.
Released:
(- Speed)
1. Press
(Speed maintained)
2. Press
(faster)
Forward button – a a and b
Reverse button – c c and d
Connection example:
Control terminal bar
ACOPOSinverter P84
Ll1 Llx Lly +24
a
b
c
d
Ll1: Forward
Llx: Reverse
Lly: + Speed
Do not use this "+/-speed" type with 3-wire control.
In both cases, the maximum speed is specified by [high speed] (HSP) .
Note:
In the event of a reference changeover by rFC from any reference channel to a different reference
channel with "+/- Speed" the value of the reference [Motor speed] (rFr) (after ramp) can be copied at the
same time in accordance with the parameter [channel copy 1 → 2] (COP) . The value of the reference
rFr (after ramp) copied.
This prevents the speed being incorrectly reset to zero when switching takes place.