GB-23
D
GB
F
NL
I
E
2
? The display blinks and indicates
2
.
!
The bus module has received an incorrect con-
figuration from the PLC.
•
Check whether the correct GSD file was im-
ported.
3
? The display blinks and indicates
3
.
▷
Fault occurs on devices with fieldbus communi-
cation with address check (P80 = 1) only.
!
The BCU has been assigned an invalid network
name or has not been assigned a network name
in the PLC.
•
Assign a network name corresponding to the
default network name (e.g. bcu-560-xxx) or use
the default name as a suffix of an individually
assigned name in the following form: “individual-
partofnamebcu-560-xxx”.
▷
“xxx” stands for the address set on the device
(e.g. 4a5).
4
? The display blinks and indicates
4
.
!
PLC in STOP position.
•
Check whether the PLC can be started.
Reading off the flame signal, fault
messages and the parameters
▷
During operation (BCU 56x = display
0 4
,
BCU 580 = display
0 8
), information about the
flame signal intensity, the last 10 fault messages
and the parameter values can be read off by
repeatedly pressing the Reset/Information button.
Display
Information
F1
F2
*
Flame signal intensity:
Burner 1
Burner 2*
E0
to
E9
Last fault message
to
tenth to last fault message
01
to
99
Parameter 01
to
parameter 99
* Only on BCU 580
•
Press the Reset/Information button for approx.
2 s until the display indicates
F1
.
•
Release the button. The display indicates the
flame signal intensity in µA.
•
Press the Reset/Information button again for
2 s to go to the next item of information (fault
message, parameter value).
▷
Each time the button is released, the correspond-
ing fault message or parameter value is displayed.
▷
To go to one of the last fault messages or to a
parameter more quickly, hold the Reset/Infor-
mation button pressed down for longer (≥ 2 s).
▷
If the button is pressed briefly, the display indi-
cates what parameter number is currently being
displayed.
▷
The normal program status is displayed again
approx. 60 seconds after the last time the but-
ton is pressed.
▷
If an operator-control unit OCU is connected,
information about the flame signal intensity, fault
messages and parameter values can only be
queried using the OCU, see page 27 (Ac-
cessories).
Parameters and values
Pa-
ram-
eter
No.
Parameter name
Parameter value
01
Burner 1 flame signal switch-off threshold
2 – 20
= µA
02
Burner 2 flame signal switch-off threshold
2 – 20
= µA
04
Flame control
0
= Ionization
1
= UVS
2
= UVD
3
= Ionization 1 and UVS 2
4
= Ionization 1 and UVD 2
5
= UVS 1 and ionization 2
6
= UVD 1 and UVD 2
7
= UVD 1 and ionization 2
8
= UVD 1 und UVS 2
06
High temperature operation
0
= Off
2
= Intermittent operation with UVS
3
= Continuous operation with ionization/UVD
5
= menox intermittent
07
Burner 1 start-up attempts
1
= 1 start-up attempt
2
= 2 start-up attempts
3
= 3 start-up attempts
08
Burner 2 start-up attempts
1
= 1 start-up attempt
2
= 2 start-up attempts
3
= 3 start-up attempts
09
Restart
0
= No
1
= Burner 1
2
= Burner 2
3
= Burner 1 and burner 2 (pilot and main burners)
4
= Max. 5 times in 15 min. for burner 1
5
= Max. 5 times in 15 min. for burner 2
6
= Max. 5 times in 15 min. for burners 1 and 2
