Laars OMNITHERM ONH1250 Assembly, Installation And Operation Instructions page 41

O T
The MNI HERM
20 Read Demand source
Modbus
Address R/W
0 Read Inlet sensor
1 Read Outlet sensor
2 Read Flue Sensor
3 Read DHW sensor
4 Read System Inlet Sensor
5 Read System Outlet Sensor
21 Read Digital Output Status
6 Read Outdoor Sensor
7 Read Flue Sensor
12 Read Flame Signal 1
14 Read 0-10VDC (4-20mA) Input for BMS
22 Read Gas and Pilot Valve Status
23 Read 0-10VDC (4-20mA) Output for Pump Spee
27 Read Modulating Fan 1 - Speed
18 Read Safety Chain Status
33 Read Modulating Burner1 Firing rate
19 Read Non-safety Chain Status
20 Read Demand source
35 Read Lockout Code
Modbus
Address R/W
21 Read Digital Output Status
22 Read Gas and Pilot Valve Status
23 Read 0-10VDC (4-20mA) Output for Pump Spee
36 Read Error Code
27 Read Modulating Fan 1 - Speed
33 Read Modulating Burner1 Firing rate
38 Read History - DHW Demand Cycles
39 Read History - CH1 Demand Cycles
40 Read History - CH2 Demand Cycles
43 Read History - Cascade Demand Cycles
44 Read History - Burner Stage 1 Cycles
48 Read History - Boiler Pump Cycles
49 Read History - DHW Pump Cycles
50 Read History - System Pump Cycles
35 Read Lockout Code
51 Read History - Average Boiler Outlet Temperatur
52 Read History - Maximum Boiler Outlet Temperatu
53 Read History - Minimum Boiler Outlet Temperatu
54 Read History - Boiler Average Firing Temperatur
55 Read History - Boiler Maximum Firing Time
56 Read History - Boiler Minimum Firing Time
64 Read Modulation Sensor
65 Read Active Service
(continued on next page)
66 Read Lag 1 State
Map Descriptor Name
Map Descriptor Name
AI 20 Read
BACnet BACnet
Data Object Read/Write
AI 0 Read
AI 1 Read
AI 2 Read
AI 3 Read
AI 4 Read
AI 5 Read
AI 21 Read
AI 6 Read
AI 7 Read
AI 12 Read
AI 14 Read
AI 22 Read
AI 23 Read
AI 27 Read
AI 18 Read
AI 33 Read
AI 19 Read
AI 20 Read
AI 35 Read
BACnet BACnet
Data Object Read/Write
AI 21 Read
AI 22 Read
AI 23 Read
AI 36 Read
AI 27 Read
AI 33 Read
AI 38 Read
AI 39 Read
AI 40 Read
AI 43 Read
AI 44 Read
AI 48 Read
AI 49 Read
AI 50 Read
AI 35 Read
AI 51 Read
AI 52 Read
AI 53 Read
AI 54 Read
AI 55 Read
AI 56 Read
AI 64 Read
AI 65 Read
AI 66 Read
0=None
1=Anti-Short Cycle
2=Service
3=DHW
4=Cascade
5=External
6=CH1
Notes
7=CH2
10=Anti-Frost
11=Warm Weather Shutdown
bit0 = Run Contact
bit1 = Alarm Contact
bit2 = DHW Pump
bit3 = System Pump
bit5 = Aux Dry Contact 1
bit6 = Aux Dry Contact 2
bit7 = Boiler Pump
bit8 = Aux Powered Contact
bit 0 = N/A
bit0 = Flow Switch
bit 1 = Burner 1 Gas valve 1
bit1 = LWCO
bit2 = MRHL mV
bit3 = SV2 Valve Interlock RPM
bit4 = High Gas Pressure %
LOW FLOW ERROR = 0
bit5 = Low Gas Pressure
LOW WATER CUT OFF ERROR = 1
bit6 = ARHL
MANUAL RESET HIGH LIMIT ERROR = 2
bit7 = Condensate Level
BLOCKED FLUE ERROR = 3
bit0 = Field Input 1
HIGH GAS PRESSURE ERROR = 4
bit1 = Field Input 2
LOW GAS PRESSURE ERROR = 5
0=None
AUTO RESET HIGH LIMIT ERROR = 6
1=Anti-Short Cycle
SPARE SAFETY CHAIN ERROR = 7
2=Service
OUTLET PROBE ERROR = 8
3=DHW
OUTLET PROBE DRIFT ERROR = 9
4=Cascade
5=External OUTLET PROBE HIGH LIMIT ERROR = 10
6=CH1 FLUE PROBE ERROR = 11
FLUE PROBE DRIFT ERROR = 13
7=CH2
FLUE PROBE HIGH LIMIT ERROR = 14
10=Anti-Frost
INLET PROBE ERROR = 15
11=Warm Weather Shutdown
Notes
DELTA T ERROR = 16
bit0 = Run Contact
GENERIC LOCKOUT = 17
bit1 = Alarm Contact
BURNER1 MAX TRIALS ERROR = 22
bit2 = DHW Pump
BURNER1 MAX FLAME LOST ERROR = 24
bit3 = System Pump
BURNER1 FAN SPEED ERROR = 28
bit5 = Aux Dry Contact 1
NO LOCKOUT = 255
bit6 = Aux Dry Contact 2
24VDC ERROR = 30
bit7 = Boiler Pump
24VAC ERROR = 31
bit8 = Aux Powered Contact
DHW PROBE ERROR = 32
bit 0 = N/A
SYSTEM SUPPLY PROBE ERROR = 33
bit 1 = Burner 1 Gas valve 1
SYSTEM RETURN PROBE ERROR = 34
mV
OUTDOOR PROBE ERROR = 35
RPM
FLUE PROBE ERROR = 36
%
HIGH LIMIT AUTO ERROR = 41
LOW FLOW ERROR = 0
HIGH DELTA T ERROR = 42
LOW WATER CUT OFF ERROR = 1
FAN SPEED ERROR = 43
MANUAL RESET HIGH LIMIT ERROR = 2
x 10
BLOCKED FLUE ERROR = 3
x 10
HIGH GAS PRESSURE ERROR = 4
x 10
LOW GAS PRESSURE ERROR = 5
x 10
AUTO RESET HIGH LIMIT ERROR = 6
x 10
SPARE SAFETY CHAIN ERROR = 7
x 10
OUTLET PROBE ERROR = 8
x 10
OUTLET PROBE DRIFT ERROR = 9
x 10
OUTLET PROBE HIGH LIMIT ERROR = 10
°
FLUE PROBE ERROR = 11 F
°
FLUE PROBE DRIFT ERROR = 13 F
°
FLUE PROBE HIGH LIMIT ERROR = 14 F
°
INLET PROBE ERROR = 15 F
Hours
DELTA T ERROR = 16
Hours
0 = None
1 = Outlet
2 = DHW
3 = System
4 = Inlet
5 = Flue
6 = System Return
%
0 = Not Present
1 = Not Available
2 = Available
3 = Running
Page 41