BCU 580 · Edition 11.15l 77
Parameters
IC 20..E
20 19 18 3 2 167 4812 11
S3
S4
S1 0
OUT
0°
➔
90°
0°
90°
90°
➔
0°
IC 20..E
S1
S2
517
+ +
IN
OK
R
R
PE
A
D
A
D
R
1 2 3 4 5 6
ON
µC
131516
M
PE
L1
N
S1
Min Max
53 54 55 56
52
65 66 67 68
49 50 51
17 18 37 38
13 14 15
BCU 580..F1
µC
88
c
c
41 42
24V
DC
5 6 9 11 1210762 61
The positions for minimum capacity, maximum capac-
ity and ignition capacity can be set using the actuator.
When the appropriate position has been reached, this
information is signalled back via terminal 52. If no sig-
nal is received that the position has been reached with-
in the timeout time of 255 s, a safety shut-down of the
BCU will be performed and a fault message (A , A or A
) will be displayed, see page 51 (Fault signalling). In
addition, the actuator will be moved to the set position
for minimum capacity using the output at terminal 54.
The control system is enabled during operation via the
controller enable output (terminal 56). During the con-
troller enable procedure, the actuator can be adjusted
infinitely between the positions for maximum and mini-
mum capacity by a controller (0(4) – 20 mA, 0 – 10 V)
using the setpoint device on terminals 17 and 18 or the
bus signal. There is no timeout active in this case.
If bus control is active (parameter 75), the controller en-
able output (terminal 56) has a different function. The
wiring between the BCU and the 3-point step controller
can be adjusted so that the control range of the actua-
tor is between the positions for maximum and ignition
capacity.
53 54 55 56
52
65 66 67 68
49 50 51
17 18 37 38
13 14 15
BCU 580..F1
µC
88
c
c
41 42
24V
DC
5 6 9 11 1210762 61
PE
L1
N
3 2 116 67 4812 1115 13
S3 S4
S11
S10
0°
90°
M
IC 20
PE
S1S2
90°➔0°
0°➔90°
S1
Min Max
3PS
Manual mode
In Manual mode, the actuator can be moved between
the positions for maximum and minimum capacity in
3-point step operation. No timeout is active when ap-
proaching these positions. The controller enable output
(terminal 56) is not active and not checked.
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