Honeywell BCU 460 - Page 55

BCU 460, BCU 465 · Edition 11.19 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 Data type Format Value
0
1
2
3
4
5
6
7
Burner 1 flame signal Byte DEC
0 – 255
1)
(0 – 25.5 μA)
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 Data type Format Value
0
1
2
3
4
5
6
7
Burner 2 flame signal Byte DEC
0 – 255
1)
(0 – 25.5 μA)
1)
See code tables “BusCommunication_BCU4_R2.xlsx” at www.
docuthek.com.
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 Data type Format Value
0
1
2
3
4
5
6
7
Status messages Byte DEC 0 – 255
1)
1)
See code tables “BusCommunication_BCU4_R2.xlsx” at www.
docuthek.com.
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