AERCO Modbus Communications Manual - Manual (Page 28)

GF-114
MODBUS
Communication
Chapter 2
OMM-0035_0C
USER MANUAL Standard Register Assignments
Page 28 of 200 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph.: 800-526-0288 05/18/12
2.3.2 BMS/BMS II Controller Standard Holding Register Assignments
The Holding Register address assignments for the BMS/BMS II/ACS are listed in Table 2-4
which follows. Unless otherwise specified, all Holding Register Menu items are Read/Write
(R/W).
Table 2-4: BMS/BMS II Standard Holding Register Address Mapping
Modbus Data
Address
Decimal (Hex)
Menu Item Units and Range
Default/
Comments
0 (0x0000) (Reserved)
1 (0x0001) (Reserved)
2 (0x0002) (Reserved)
3 (0x0003) (Reserved)
4 (0x0004)
Net Header Set
Temp
40 to 220°F
Valid when Header Set Mode =
Remote Setpt and Remote
Signal = Network
5 (0x0005) System Start Temp 32 to 120°F Default = 70°F
6 (0x0006) System Start Option 0 or 1, 0 = Temp Only,
1 = Temp and Load
Default = 0
7 (0x0007)
Manual Hdr Set
Temp/Internal Setpt 40 to 220°F
Default = 160°F
8 (0x0008) Bldg Ref Temp 40 to 220°F Default = 70°F
9 (0x0009) Indoor Prop Band
0.0 to 20.0°F/°F
(0.5°F/°F increments)
Default = 00.0°F/°F
(Value x 10) (BMS Only)
10 (0x000A)
Indoor Setpoint
Temp
50 to 150°F
Default = 70°F
(BMS Only)
11 (0x000B) Reset Ratio
0.3 to 3.0
(0.1 increments),
Default = 1.2
(Value x 10)
12 (0x000C) Max Header Temp 40 to 220°F Default = 220°F
13 (0x000D) Min Header Temp 40 to 220°F Default = 40°F
14 (0x000E) Start Percent 25 to 100%
Default = 45% (BMS)
Default = 20% (BMS II)
15 (0x000F) Stop Percent 10 to 45%
Default = 18% (BMS)
Default = 16% (BMS II)
16 (0x0010) Integral Gain
0.00 to 9.99 Rep/Min
(in 0.01 increments
Default = 0.15 Rep/Min
(Value x 100)
17 (0x0011) Header Set Mode
0, 1, or 2
0 = Constant Setpt
1 = In/Outdoor Reset
2 = Remote Setpt
Default = 0
(Constant Setpt))