AERCO Modbus Communications Manual - Manual (Page 29)

Chapter 2
MODBUS
Communication GF-114
Standard Register Assignments USER MANUAL
OMM-0035_0C
05/18/12 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 Page 29 of 200
Table 2-4: BMS/BMS II Standard Holding Register Address Mapping (Cont.)
Modbus Data
Address
Decimal (Hex)
Menu Item Units and Range
Default/
Comments
18 (0x0012) Derivative Gain
-2.00 to 2.00
(0.00 increments)
Default = 0.15
(Value x 100)
19 0x0013) Header Temp Bandwidth 5 to 120°F Default = 70°F
20 (0x0014) Aux Relay Open 0 to 99% Default = 45%
21 (0x0015) Aux Relay Mode
0 or 1
0 = 100% Fire Rate
1 = 100% Fire Rate and Off
Default = 1
(100% Fire Rate & Off)
22 (0x0016)
Temp Sensor Fail
Mode/Failsafe Mode
0 or 1
0 = Shutdown
1 = Switch Inputs/Constant
Setpt
Default = 0
(Shutdown)
23 (0x0017)
Fault Alarm Relay Mode
0, 1, 2, 3
0 = All Faults,
1 = No Interlock
2 = Interlock 1
3 = Interlock 2
Default = 0
(All Faults)
24 (0x0018) Fault Alarm Clear Method
0 or 1
0 = Automatic
1 = Manual
Default = 0
(Automatic)
25 (0x0019) Boiler Operation Mode
0, 1 or 2
0 = Parallel
1 = Sequential
2 = Combination
Default = 1
(Sequential)
26 (0x001A)
Number Of
Combination Mode
Boilers
0 to 4
Default = 0 (BMS Only)
(Start at Boiler 8 and
work back to Boiler 5 to
assign Combo Boilers)
27 (0x001B) (Reserved)
28 (0x001C) (Reserved)
29 (0x001D) (Reserved)
30 (0x001E)
Max Power Input
50 to 100%
Default = 100%
(Fire Rate)
31 (0x001F)
Interlock 1 Method
(BMS)/Sys Intlk Config
(BMS II)
0 or 1
0 = Always Enabled
1 = Start Enabled
Default = 1
(Start Enabled)