Honeywell BCU 465 - Profibus

BCU 460, BCU 465 · Edition 11.19 59
Fieldbus communication
8.4 PROFIBUS
Input bytes (BCU ➔ master)
Bit Byte 0 Byte 1 Byte 2 Byte 3 Byte 4
0 Reset
Free
See table on
page60 (Program step/status)
Burner 1 flame signal
0 – 25.5 µA
255 steps
Free
1 Start 1
2 Air ON
3 Purge ON
4 Auxiliary gas
5
Flameless
mode ON
6 Free
7 Free
BCU 460/465 basic I/O
BCU 460/465 standard I/O
Output bytes (master ➔ BCU)
Bit Byte 0
0 Reset
1 Start 1
2 Cooling
3 Purge
4 Free
5 Free
6 Free
7 Free
I/O bytes: the programmer can choose the data to be
transferred.
Inputs Outputs
460/465 basic I/O 1 byte 1 byte
460/465 standard I/O 4 bytes 1 byte
480 basic I/O 1 byte 1 byte
480 standard I/O 5 bytes 1 byte
Baud rate: up to 1500 kbit/s.
The max. range per segment depends on the baud rate:
Baud rate [kbit/s] Range [m]
93.75 1200
187.5 1000
500 400
1500 200
The specified ranges can be increased by using repeat-
ers. No more than three repeaters should be connected
in series.
The specified ranges relate to bus cable typeA (2-core,
shielded and twisted), e.g.
Siemens, Order No. 6XV1830-0EH10, or
Lapp cable unitronic, Order No. 2170-220T.