Modbus, Communication, Gf-114 – AERCO Modbus Communications Manual User Manual
Page 19
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
19 of 200
Table 2-2: C-More Controller Standard Holding Register Address Mapping
(Continued)
Modbus Data
Address
Decimal (Hex)
Menu Item
Units and Range
Comments
24 (0x0018)
Failsafe Mode
enum (0, 1)
0=Shutdown
1=Constant Setpoint
Default = 0 (Shutdown)
25 (0x0019)
Low Fire Timer
SEC_UNITS (2 to 60)
1count/sec
Default = 2 sec.
26 (0x001A)
Prop Band
ABS_DEG_1 (0 to 1000)
See Appendix A,
Tables A-2 and A-3 for
Conversions
27 (0x001B)
Integral Gain
0.00 to 2.00
(0.01 increments)
Actual x 100 Counts
Defaults:
Boiler: 0.10 (10 counts),
Heater:1.60 (160 counts)
28 (0x001C)
Derivative Time
MIN_UNITS (0.00 to 2.00)
(0.01 min. increments)
1count/0.01min
Actual x 100 Counts
Defaults:
Boiler: 0.00 min.
(0 counts)
Heater: 0.10 min
(10 counts)
29 (0x001D)
Min Load Adjust
ABS_DEG_1 (0 to 1000)
Water Heater ONLY
See Appendix A,
Tables A-2 and A-3 for
Conversions
30 (0x001E)
Max Load Adjust
ABS_DEG_1 (0 to 1000)
Water Heater ONLY
See Appendix A,
Tables A-2 and A-3 for
Conversions
31 (0x001F)
Outlet Feedback
bool (0, 1)
0 = Off
1 = On
Default = 1 (On)
Water Heater ONLY
32 (0x0020)
Thru
59 (0x003B)
(Reserved)
60 (0x003C)
Set Point Limiting
bool (0, 1)
0 = Disabled
1 = Enabled
Default = 0 (Disabled)
61 (0x003D)
Set Point Limit Band ABS_DEG_1 (0 to 1000)
See Appendix A,
Tables A-2 and A-3 for
Conversions
62 (0x003E)
Thru
66 (0x0042)
(Reserved)