AERCO Modbus Communications Manual for ECS - Manual (Page 10)

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6. REFERENCE DOCUMENTS
1. Eurotherm 2000 Series Communications Handbook, # HA026230
2.
Eurotherm 2404/2408 Control Setpoint Programmer Installation and Operation
Handbook, # HA025132
7. INTERFACING THE ECS WITH A BUILDING BAS/EMS
The ECS may be interfaced with a building’s Building Automation System (BAS) or Energy
Management System (EMS). Table 3 below shows the Modbus data addresses both for the
BAS/EMS and the AERCO ECS.
Table 3. AERCO Electronic Control System (ECS) Point Definitions
Equip. Point Name
BAS Modbus
Data Addr
AC-106 Point
Name
Reg.
Type
Modbus Data
Addr (Hex/Dec.) Units (Range)
Electric Valve (ECS)
01-Cntl Output
Signal
30004
OP (Control
Output Signal)
Input 0x0003 / 3 % (0 to 100)
02-Setpoint 30006 w.SP (Setpoint) Input 0x0005 / 5 °F (40 to 180)
03-RmSetpt 40027
Remote Input
Comms Access
parameter(Setpoi
nt)
Holding 0x001A / 26 °F (40 to 180)
04-Outlet Temp 30002
Top Value (Outlet
Temp)
Input 0x0001 / 1 °F (40 to 205)
05-FBk Sensor
Temp
30290
Li1 (Feedback
Sensor Temp)
Input 0x0121 / 289 °F (40 to 180)
06-Over Temp Alarm 30075
AL 1 (Over Temp
Alarm)
Input 0x004A / 74
Enum (0,1) 0 = Safe, 1 =
Alarm
07-Flow Rate 30291 Li2 (Flow) Input 0x0122 / 290 GPM
IMPORTANT
All Modbus addresses specified in this manual are written generically in
hexadecimal/decimal format. However, many Building Automation Systems utilize
another form of addressing where:
• 40001 is added to the generic address for a Holding Register
address.
• 30001 is added to the generic address for an Input Register
address.
Check the addressing scheme being used by the BAS interfaced to the XPC Gateway.