Honeywell 7800 Series Product Data page 54

7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module
Reg-
Address
ister
(hex)
(dec)
0054 40085
0055 40086
0056 40087
0057- 40088-
0065 40102
0066 40103
0067 40104
0068 40105
0069 40106
006A 40107
006C- 40109-
007E 40127
007F 40128
01B7- 40440-
01B8 40441
32-00110-07
Parameter Read/
Name Write
BC Remote
Command R
status.
BC Flame Ampli-
R
fier type
BC Purge Time R
BC Diagnostics R
Post-Purge time R
Valve Proving
R
Mode
Valve Proving
R
option
Valve Proving
R
time
BC terminal
R
state bits
Unused
BC Remote
R/W
Command
Unused
For-
mat
Bit 0: Autonomous.
Bit 1: Remote commanded off.
Bit 2: Remote commanded High fire. Bit
3: Remote commanded low fire.
U16 Bit 4: Remote reset has/will be sent to
BC.a Bits 5-14: Unused.
Bit 15: Copied after the most recent write
to the burner control command (40128
bit 15).
0 = Standard
1 = Unknown
U16
2 = Amplicheck or missing amplifier 3 =
Shutter
U16 Seconds
String codes indicating terminal/jumper
state. See Table 21. There are up to 15
U16
codes. Not all are used for some burner
controls.
U16 Seconds
0 = Valve Proving is not enabled 1 = En-
abled before Run
2 = Enabled after Run
U16
3 = Enabled before and after Run
4 = Enabled split half before and half
after Run
1 = Uncommissioned
U16
2 = Commissioned
U16 Seconds
Bit 0 (LSB) to Bit 31 (MSB) represent
terminals T0 to T31 of burner control:
T0 = Run/Test switch T5 = Fan
U32 T6-T21 = terminal T24 = Alarm
T25 = Modulate T26 = Reset
T27 = Safety relay T28 = Flame ILK T29 =
Main Valve 2
Only one bit in the LSByte must be set,
with the exception of bit 15:
Bit 0 =Revert to autonomous operation.
Bit 1 = Don't fire, remain off.
Bit 2 = Go to Hi Fire during Run. Bit 3 =
Go to Lo Fire during Run. Bit 4 = Remote
reset.a
Bits 5-7 must be 0. Bits 8-14 are ignored.
U16
Bit 15: Copied to the control status reg-
ister. The remote control status register
can be used to verify operation of the
command.
Bits 1-3 must be refreshed at least every
120 seconds, but not more than once a
second, for the burner control to remain
in the commanded state.
U32
54
Notes