Honeywell S7800A1167 Manual page 41

Table 18. Response Message Format for function code 17 (11h), (26 bytes).
Slave Function
Address
Byte 0 1
a
Slave ID: Always 0x78 when using RM78xx or EC78xx Relay Modules(1 byte) (byte 3).
b
Run Indicator Status: Always FF=ON (one byte) (byte 4).
c
Device Description: 16 Character ASCII OS number for the Burner Control (11 bytes) (bytes 5-15).
Burner Control Type Codes
The burner control type code indicates the exact model
number of the burner control. See Table 19.
Table 19. Burner Control Type Codes.
CODE
0
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
123
124
125
126
127
128
129
130
131
132
133
134
Code Byte Count Slave ID
2 3
DEVICE DESCRIPTION
(undefined)
RM7800E
RM7800G
RM7800L
RM7800M
RM7838A
RM7838B
RM7840E
RM7840G
RM7840L
RM7840M
RM7885A
RM7888A
RM7890A
RM7895A
RM7895B
RM7823A
RM7824A
RM7830A
RM8738C
RM7845A
RM7850A
RM7865A
RM7865B
RM7865C
RM7890B
RM7890B
RM7890C
RM7890D
RM7895C
RM7895D
RM7895E
RM7895F
RM7896A
RM7896B
RM7896C
RM7896D
7800 SERIES S7800A1167 KEYBOARD DISPLAY MODULE
Run Indicator Device
a b
Status Description
4 5-15
CODE
135
136
137
138
139
140
199
200
201
202
203
204
205
206
207
208
209
210
299
7800 SERIES Burner Control State Bits
The burner control sequence state is translated into State Bit
Register as shown in Table 20.
Table 20. Burner Control State Bits.
BIT Description
0 Initiate
1 Standby
2 Purge
3 Pilot Ignition
4 Main Ignition
5 Run
6 Postpurge
7 Pre-Ignition
8 Valve Proving
13 Alarm
14 Hold
15 Lockout
41
c
N/A CRC CRC
16-23 24 25
DEVICE DESCRIPTION
RM7897A
RM7897C
RM7898A
R7140G
R7140L
R7140M
RM78xx
EC7810A
EC7820A
EC7830A
EC7850A
EC7885A
EC7890A
EC7895A
EC7895C
EC7823A
EC7840L
EC7865
EC78xx
BC State Bits Register
0000 0000 0000 0001
0000 0000 0000 0010
0000 0000 0000 0100
0000 0000 0000 1000
0000 0000 0001 0000
0000 0000 0010 0000
0000 0000 0100 0000
0000 0000 1000 0000
0000 0001 0000 0000
1010 0000 xxxx xxxx
NOTE: Lockout bit is also set.
0100 0000 xxxx xxxx
One other bit may be on.
1010 0000 0000 0000
NOTE: Alarm bit is also set.
65-0311—02