Submittal Sheet

7800 SERIES S7800A2142 KEYBOARD DISPLAY MODULE
32-00110—05 60
7800 SERIES Burner Control State Bits
The burner control sequence state is translated into State
Bit Register as shown in Table 20.
7800 SERIES Sequence State Codes
Sequence state codes are provided by the Burner Control.
Each code is translated into two string codes for
displaying an associated message in two lines. Each code
is also translated into burner control state bits which may
be used to generate and control system diagrams on an
operator interface. The codes can also be retrieved from
registers 40004, 40005, and 40013.
The Sequence State Codes shown in Table 20 are valid
only if the Fault Code has a value of zero. If the Fault Code
is non-zero, the sequence state field contains the
sequence state code when the lockout occurred.
203 EC7850A
204 EC7885A
205 EC7890A
206 EC7895A
207 EC7895C
208 EC7823A
209 EC7840L
210 EC7865
299 EC78xx
Table 19. Burner Control State Bits.
BIT Description BC State Bits Register
0 Initiate 0000 0000 0000 0001
1 Standby 0000 0000 0000 0010
2 Purge 0000 0000 0000 0100
3 Pilot Ignition 0000 0000 0000 1000
4 Main Ignition 0000 0000 0001 0000
5 Run 0000 0000 0010 0000
6 Postpurge 0000 0000 0100 0000
7 Pre-Ignition 0000 0000 1000 0000
8 Valve Proving 0000 0001 0000 0000
13 Alarm 1010 0000 xxxx xxxx
NOTE: Lockout bit is also set.
14 Hold 0100 0000 xxxx xxxx
One other bit may be on.
15 Lockout 1010 0000 0000 0000
NOTE: Alarm bit is also set.
Table 18. Burner Control Type Codes.
CODE DEVICE DESCRIPTION
Table 20. 7800 SERIES Sequence State Codes
and Associated register code values.
Register
40003
7800 SERIES
Sequence
State
String
Code
Uses
mm:ss
Burner
Control
State
Bits
Line
1
Line
2
Fault
code not
zero
LOCKOUT 52 Table
22
8000h
0 UNUSED HISTORY 0 0 0000h
1INITIATE 480 0001h
2 INITIATE HOLD: AC
FREQUENCY/NOI
SE
49 8 4001h
3INITIATE HOLD:
AC LINE DROPOUT
49 9 4001h
4INITIATE HOLD:
AC FREQUENCY
49 7 4001h
5INITIATE HOLD:
LOW LINE
VOLTAGE
49 60 4001h
6 STANDBY 103 0 0002h
7
STANDBY HOLD:
REM
REMOTE CONTROL
104 94 4002h
8 STANDBY HOLD:
START SWITCH
104 106 4002h
9
STANDBY HOLD:
F/G FL AME
DETECTED
104 35 4002h
10 STANDBY HOLD:
T20
PRE-IGNITION
104 86 4002h
11
STANDBY HOLD: T7
RUNNING
INTERLOCK
104 101 4002h
12 STANDBY HOLD: T7
LOCKOUT
INTERLOCK
104 54 4002h
13 STANDBY HOLD:
AIRFLOW SWITCH
104 13 4002h
14 PURGE HOLD: T19
HIGH FIRE
SWITCH
93 40 4004h
15 PURGE DELAY:T19
HIGH FIRE
JUMPRD
89 39 4004h
16 PURGE HOLD:
TEST
RUN/TEST SWITCH
93 98 4004h
17
PURGE DELAY: T18
LOW FIRE JUMPRD
89 56 4004h
18 PURGE HOLD: F/G
FLAME DETECTED
93 35 4004h
19 PURGE 87 0  0004h