Honeywell 7800 SERIES Product Data

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
320011007 54
Address
(hex)
Reg-
ister
(dec)
Parameter
Name
Read/
Write
For-
mat
Notes
0054 40085
BC Remote
Command
status.
R U16
Bit 0: Autonomous.
Bit 1: Remote commanded off.
Bit 2: Remote commanded High fire. Bit
3: Remote commanded low fire.
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).
0055 40086
BC Flame Ampli-
fier type
R U16
0 = Standard
1 = Unknown
2 = Amplicheck or missing amplifier 3 =
Shutter
0056 40087 BC Purge Time R U16 Seconds
0057-
0065
40088-
40102
BC Diagnostics R U16
String codes indicating terminal/jumper
state. See Table 21. There are up to 15
codes. Not all are used for some burner
controls.
0066 40103 Post-Purge time R U16 Seconds
0067 40104
Valve Proving
Mode
R U16
0 = Valve Proving is not enabled 1 = En-
abled before Run
2 = Enabled after Run
3 = Enabled before and after Run
4 = Enabled split half before and half
after Run
0068 40105
Valve Proving
option
R U16
1 = Uncommissioned
2 = Commissioned
0069 40106
Valve Proving
time
R U16 Seconds
006A 40107
BC terminal
state bits
R U32
Bit 0 (LSB) to Bit 31 (MSB) represent
terminals T0 to T31 of burner control:
T0 = Run/Test switch T5 = Fan
T6-T21 = terminal T24 = Alarm
T25 = Modulate T26 = Reset
T27 = Safety relay T28 = Flame ILK T29 =
Main Valve 2
006C-
007E
40109-
40127
Unused
007F 40128
BC Remote
Command
R/W U16
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.
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.
01B7-
01B8
40440-
40441
Unused U32

Honeywell 7800 SERIES Specifications

General

Model	7800 SERIES
Category	Control Unit
Frequency	50/60 Hz
Approvals	UL, CE
Communication	Communication Interface (Optional)