AERCO Modulex E8 Controller (and BCM) For Modulex EXT Boilers - Manual (Page 93)

E8 Controller and BCM for Modulex EXT
Installation, Operation & Maintenance Manual
CHAPTER 9: BCM MODBUS AND ADDRESS ASSIGNMENTS
OMM-0093_0A AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 93 of 108
GF-136-C Ph.: 800-526-0288 PRI: 06/24/2013
Table 9-4: BCM Standard Holding Register Address Mapping
Modbus Data
Address
Menu Item Units and Range Default/(Comments)
CONTROL REGISTERS
1
AERCO BMS
II/ACS Requested
Modulation Level
% (0 to 100)
(Read/Write)
A value other than 0
requests Run mode and
supersedes the value set for
Max Modulation Level
(address 0x03F9)
1017
Maximum
Modulation Level
% (0 to 100)
(Value x 2)
(Read/Write)
100° (50%)
1004
Requested
Setpoint
32°F – 212°F (0°C – 100°C)
(Value x 10)
(Read/Write)
180°F
1001 System Command enum (0xAA)
(Read/Write)
0xAA: Restart Slave
identification procedure
1021
Heat Request
Command
enum
(0x01, 0x33, 0x44, 0x55,
0xBB, 0xCC, 0xEE)
0x01: No action
0x33: Space Heating
mode enabled
0x44: Space Heating &
DHW modes
enabled
0x55: DHW mode
enabled
0xBB: Space Heating
requested & DHW
enabled
0xCC: Check request
0xEE: Space Heating
request
If enum is none of the above,
Standby is selected.
(Read/Write)
0x01
1022
Requested DHW
Setpoint
32°F – 212°F (0°C – 100°C)
(Value x 10)
(Read/Write)
1023 Pump Control
enum (0, 1, 2)
0 = No action
1 = Switch OFF
2 = Switch ON
(Read/Write)
1030 Error/Reset enum (0x5A) (Read/Write)
1031
Run Counters
Clear
enum (0x5A) (Read/Write)