Honeywell BCU 460 Technical Information page 55

Fieldbus communication
Burner 1 flame signal (BCU ➔ PLC)
The flame signal for burner 1 is transferred from the
BCU to the PLC as an analogue value using this module.
The flame signal occupies one byte with values from 0
to 255 (= flame signal from 0 to 25.5 µA).
Bit Byte n
0
1
2
3
Burner 1 flame signal
4
5
6
7
1) See code tables "BusCommunication_BCU4_R2.xlsx" at www.
docuthek.com.
Burner 2 flame signal (BCU ➔ PLC)
The flame signal for burner 2 is transferred from the
BCU to the PLC as an analogue value using this module.
The flame signal occupies one byte with values from 0
to 255 (= flame signal from 0 to 25.5 µA).
Bit Byte n
0
1
2
3
Burner 2 flame signal
4
5
6
7
1) See code tables "BusCommunication_BCU4_R2.xlsx" at www.
docuthek.com.
BCU 460, BCU 465 · Edition 11.19
Data type Format Value
0 – 255
Byte DEC
(0 – 25.5 μA)
Data type Format Value
0 – 255
Byte DEC
(0 – 25.5 μA)
Status signal (BCU ➔ PLC)
This module transfers the status signals from the
BCU to the PLC. The status signals occupy one byte
(0 to 255). Every status signal is allocated a code. The
allocation is described in the code table "BusCommuni-
cation_BCU4_R2.xlsx".
Bit Byte n
0
1
1)
2
3
Status messages
4
5
6
7
1) See code tables "BusCommunication_BCU4_R2.xlsx" at www.
docuthek.com.
▼
1)
Data type Format Value
Byte DEC 0 – 255 1)
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