FCU 500, FCU 505 · Edition 02.17 96
Parameters
RBW
Parameter 40 = 3: with RBW
The actuator can be moved to the positions for maxi-
mum capacity (contact COM to HI) and minimum ca-
pacity (contact COM to LO) using the interface and by
closing the various contacts.
N
M
R B W
90°➔0°
0°➔90°
L1
COM
HI
LO
AUTO
RBW
1 2 3 46 47 48 49 50 4 67 44
52 45 51 65 66 68
53
54 55 56
58
62 61 5 6 7 8 11 12
STW/
STB
N
P
HT
+24 V
A
ϑ
0 V
L1
LDS
0,6 × I
N
FCU 500..F2
5AT
µC
24V
DC
88
K2
K1
k11 k21
I
N
× 0,6
Gas
max
Gas
min
PZL
PDZ
PZL
PZH
Luft
min
Luft
COM
HI
LO
AUTO
1 2 3 46 47 48 49 50 4 67 44
52 45 51 65 66 68
53
54 55 56
58
62 61 5 6 7 8 11 12
STW/
STB
N
P
HT
+24 V
A
ϑ
0 V
L1
LDS
0,6 × I
N
FCU 500..F2
5AT
µC
N
M
+ F -
0°➔90°
L1
mA
A
D
OUT
+
-
RBW
88
K2
K1
k11 k21
I
N
× 0,6
Gas
max
Gas
min
PZL
PDZ
PZL
PZH
Luft
min
Luft
PLC
The RBW actuator reports that it has reached the posi-
tion for maximum capacity via a signal to terminal 51.
The actuator reports that it has reached the position
for minimum capacity via a signal to terminal 52. The
simultaneous activation of terminals 51 and 52 results
in a fault lock-out of the FCU.
If parameter 41 = 0, the system monitors the movement
to the positions for maximum and minimum capac-
ity with a timeout time of 255 s. Reaching the relevant
position immediately triggers the program continue
switch conditions. If reaching the position is not sig-
nalled within the timeout time of 255 s, a safety shut-
down of the FCU will be performed. A fault message (A
or A ) will be displayed, see page 70 (Fault signal-
ling).
If parameter 41 = 1, the system does not monitor
whether the positions for minimum and maximum
capacity are reached. In this case, a running time of
up to 250 s must be defined using parameter 42, see
page 100 (Running time). The program continue
switch conditions are then controlled dependent on
this time.
If a fault occurs, the actuator is moved to the position
for minimum capacity.
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