BCU 560, BCU 565 · Edition 02.16
81
Parameters > Air control > Capacity control
IC 40
Parameter 40 = 2: with IC 40.
To ensure that the actuator IC 40 can be operated on the
BCU..F1, P40 = 2 (capacity control) must be set. The operating
mode of actuator IC 40 may be parameterized to 11 or 27.
N
IC 40
PE
19 18
16 15 14
12 11 10
8 7
5 4
2 1
A
AC
D
DC
M
mA
L N
22 21 20
R..
53
54
55
56
52
1
2
3
46
45
65
66
67
68
49
50
51
17
18
37
38
13
14
15
BCU 560..F1
3,15AT
µC
88
c
c
41
42
24V
DC
5 6
9
11 12
10
7
62 61
The positions for maximum capacity and ignition capacity
can be set using the actuator. Terminal 51 checks whether the
position for maximum capacity has been reached. Terminal 52
checks the position for ignition capacity. If the position is not
reached within the timeout time of 255 s, a safety shut-down
of the BCU will be performed. A fault message (
A
,
A
or
A
)
will be displayed, see page 50 (Fault signalling).
If a controller enable is active, the control system is enabled
for operation via the outputs at terminals 53 and 55.
Operating mode 11
Operating mode 11 allows cyclic operation (ON/OFF and OFF/
Low/High/OFF).
The actuator IC moves to the ”High fire” position during the
controller enable procedure. There is no timeout active in
this case.
t [s]
t [s]
t1
t2
t3
t4
t5
t6
DI 1
DI 2
Purge
Closed
Ignition
High
fire
BCU
IC 40 (operating mode 11)
Signal at
terminal
Position
Butterfly valve position
55
53
OFF
OFF
Closed
Closed
ON
OFF
Ignition
Minimum/Ignition capacity
ON
ON
High fire
rate
High fire rate
OFF
ON
Purge
Maximum capacity
▼
