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S7810M MODBUS™ MODULE
65-0249—07
6
Table 10. ModBus™ Register Assignments.
Address
(hex)
Register
(dec)
Parameter Name
Read/
Write Format
Notes
0000
40001
Burner Control (BC) Fault
Code
R
U16
See Table 17. Non-zero value = Lockout number.
0001
40002
BC Fault String Code
R
U16
See Table 16. Lockout text.
0002
40003
BC Sequence State
R
U16
See Table 15 (current only if Fault code = 0).
0003
40004
BC State String Code (line 1) R
U16
See Table 16. Simulates Line 1 of S7800.
0004
40005
BC State String Code (line 2) R
U16
See Table 16. Simulates Line 2 of S7800.
0005
40006
BC Sequence time
R
U16
0-4095 Seconds.
0006
40007
BC Total cycles
R
U32
Max value is 0xFFFFFFFF.
0008
40009
BC Total hours
R
U32
Max value is 0xFFFFFFFF.
000A
40011
BC Flame 1 signal strength
R
U16
0 to 255 represents 0.0 to 25.5 volts. Not clipped to 5.0V like
S7800 and S7999B.
000B
40012
Unused
000C
40013
BC State Bits
R
U16
See Table 22.
000D
40014
S7830 First Out Code
R
U16
See Table 19.
000E
40015
S7830 State Bits
R
U32
Bit 31 (MSB) to Bit 0 (LSB) represent Terminals T31 to T0 of
the Expanded Annunciator. Only T4-T22 are used.
0010-
0019
40017-
40026
BC Fault history record 1
R
Newest fault record. See Table 18.
001A-
0023
40027-
40036
BC Fault history record 2
R
Second newest fault record. See table 18.
0024-
002D
40037-
40046
BC Fault history record 3
R
Third newest fault record. See Table 18.
002E-
0037
40047-
40056
BC Fault history record 4
R
Fourth newest fault record. See Table 18.
0038-
0041
40057-
40066
BC Fault history record 5
R
Fifth newest fault record. See Table 18.
0042-
004B
40067-
40076
BC Fault history record 6
R
Oldest fault record. See Table 18.
004C
40077
BC Flame Failure Response
Time
R
U16
Tenths of Seconds.
004D
40078
BC Manufacturing code
R
U32
004F
40080
BC Type Code
R
U16
See Table 21.
0050
40081
S7810M/BC Software version R
U32
0052
40083
EA Software version
R
U32
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 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 16.
There are up to 15 codes. Not all are used for some burner
controls.
0066
40103
Post-Purge time
R
U16
Seconds