Product Overview

S7810M MODBUS™ MODULE
65-0249—07 12
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 Sequence State Codes shown in Table 15 are current 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.
The codes can also be retrieved from registers 40004, 40005,
and 40013.
Table 15. 7800 SERIES Sequence State Codes
and Associated register code values.
Register
40003
7800 SERIES
Sequence
State
String Code
Uses
mm:ss
Burner
Control
State
BitsLine 1 Line 2
Fault
code not
zero
LOCKOUT 52 Table
17
8000h
0 UNUSED
HISTORY
0 0 0000h
1INITIATE480 0001h
2 INITIATE HOLD:
AC
FREQUENCY/
NOISE
49 8 4001h
3 INITIATE HOLD:
AC LINE
DROPOUT
49 9 4001h
4 INITIATE HOLD:
AC
FREQUENCY
49 7 4001h
5 INITIATE HOLD:
LOW LINE
VOLTAGE
49 60 4001h
6 STANDBY 103 0 0002h
7STANDBY
HOLD: REM
REMOTE
CONTROL
104 94 4002h
8STANDBY
HOLD:
START SWITCH
104 106 4002h
9STANDBY
HOLD: F/G
FLAME
DETECTED
104 35 4002h
10 STANDBY
HOLD: T20
PREIGNITION
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
20 PURGE HOLD:
T18
LOW FIRE
SWITCH
93 58 4004h
21 PURGE HOLD:
T7
Running
Interlock
93 101 4004h
22 PURGE HOLD:
LOCKOUT
INTERLOCK
93 54 4004h
23 PURGE HOLD:
AIRFLOW
SWITCH
93 13 4004h
24 PURGE HOLD:
START SWITCH
93 106 4004h
25 PILOT IGN 78 0  0008h
26 PILOT HOLD:
TEST
RUN/TEST
SWITCH
77 98 4008h
27 PILOT HOLD:
START SWITCH
77 106 4008h
28 MAIN IGN 66 0  0010h
Table 15. 7800 SERIES Sequence State Codes
and Associated register code values. (Continued)
Register
40003
7800 SERIES
Sequence
State
String Code
Uses
mm:ss
Burner
Control
State
BitsLine 1 Line 2