Honeywell BCU 465 - Page 57

BCU 460, BCU 465 · Edition 11.19 57
Fieldbus communication
BCU input information (BCU ➔ PLC)
This module transfers the signal states of the digital inputs on the BCU to thePLC.
Transfer via
Input terminals K-SafetyLink NFS bus
Bit Byte n Byte n+1 Byte n+2 Byte n+3 Byte n+4 Format
0 Terminal 1 Terminal 36 Safety interlocks (limits) Reset Auxiliary gas BOOL
1 Terminal 2 Terminal 37 LDS Burner 1 start Optional output BOOL
2 Terminal 3 Terminal 38 High temperature Air Cooling air valve BOOL
3 Terminal 4 Terminal 39 Purge Purge Free BOOL
4 Terminal 5 Terminal 40 Free Burner 2 start Free BOOL
5 Terminal 6 Terminal 41 Free Flameless operation Free BOOL
6 Terminal 7 Free Free Open control element Free BOOL
7 Terminal 35 Free Free Close control element Free BOOL
BCU output information (BCU➔PLC)
This module transfers the signal states of the digital outputs on the BCU (via output terminals and bus) to thePLC.
Bit Byte n Byte n+1 Byte n+2 Byte n+3 Byte n+4 Byte n+5 Format
0 Terminal 60 Terminals 80/81/82 Ready
Burner 1 operating
signal
Control element to
max. position
Flameless mode
ON
1)
BOOL
1 Terminal 61 Terminals 85/86/87 Purge ON
Burner 2 operating
signal
Control element to
closed position
Free BOOL
2 Terminal 62 Terminals 90/91/92 Operating signal BCU system fault Air ON Free BOOL
3 Terminal 63 Terminals 95/96 Free Fault lock-out Purge ON Free BOOL
4 Terminal 64 Terminals 95/97 Free Safety shut-down HT ON Free BOOL
5 Terminal 65 Terminal 51 Free Warning Ready Free BOOL
6 Terminal 66 Free Free BCU ON Burner 1 flame Free BOOL
7 Terminal 67 Free Free Manual mode Burner 2 flame Free BOOL
1) Only with BCU 465 depending on the parameter settings.