Submittal Sheet

7800 SERIES S7800A2142 KEYBOARD DISPLAY MODULE
32-00110—05 57
0055 40086 BC Flame Amplifier 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 = Enabled 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 register. 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.
Table 16. ModBus™ Register Assignments. (Continued)
Address
(hex)
Register
(dec) Parameter Name
Read/
Write Format Notes