Specifications

85
• DOK-DIAX01-MAIN+2AD+1M-ANW1-EN-E1,44 • 07.97
3. Controller Functions
3.16 Two-Motor Changeover
It is conceivable in some installations that two drive tasks have to be
performed at two different sites. If the two tasks never occur at the same
time, then they can be performed with two motors connected to one
control unit. The motors are selected by the controller.
2-Mot-Umschalt-Re
g
el
27
23
24
25
26
28
29
30
31
32
33
34
35
36
37
1
POS 2
E-STOP (RAC only)
RF
RUN
POS 1
MD-RED
OSZILATE
PAR 1
PAR 2
LIMIT 1
LIMIT 2
LIMIT 4
SPEED 1
SPEED 2
EXT POS
1
0
X2 Control inputs
control unit
12 SPEED CHANGE 2
X2 Signal outputs
gear change
initiated by
change in
para. record
gear-change
motor actuated
via aux. d.c.
contactor
Function tables for control inputs and signal outputs
change gear
acknowledged
by motor
contactor
(
3 AS (KDA/TDA only)
11 SPEED CHANGE 1
Legend:
= signal step
= any output state
^
^
1 = +24V
0 = 0V
^
^
(
1
1
SPEED 1
0
1
0/1
control inputs
SPEED 2
1
0
0/1
acknowledged by motor contactor
Motor 2 engaged
Motor 1engaged
fault message MOTOR 1/2 (display)
SPEED 1
CHANGE
0
1
0/1
signal outputs
SPEED 2
CHANGE
1
0
0/1
actuated gear-change
motor
motor contactor 2 engaged
motor contactor 1 engaged
fault
PAR 1
0
1
0
1
control inputs
PAR 2
0
0
1
1
P
Q
R
S
Para. record
assignment
example
Motor 1
Motor 2
Motor 1
Motor 2
assignment in para.
G-CHANGE (PQRS 14)
P14 = 1
Q14 = 2
R14 = 1
S14 = 2
2-Motoren-Umschaltung
X5
X3
NC
control unit
speed
command
value and
motor
selection
controller
motor 1
motor 2
X4
X2
Prerequisites:
• two motors of identical type
• a control unit with two encoder inputs (type code field "second encoder
inputs"=P)
• two auxiliary d.c. contactors and two motor contactors (see Figure 83)
Motor changeover is initiated by changing one of the parameter records
that is assigned to the other motor.
Figure 80: Schematic of two-motor changeover arrangement
Figure 81: Control inputs and signal outputs for two-motor changeover
Function conversion