A.O. Smith BMS Interface, Instuction Manual

Page: 38 / 85

38 Instruction manual - BMS Interface
4.1 Parameter list
Para-
meter
Register
type
Value Type Unit Description
Conversion
y = first byte
x = second byte
Unit type
BFC SGS SGE
0 03 16 bits direct Address - Actual Modbus address BMS Interface - Yes Yes Yes
1 03 16 bits direct Temperature °C Temperature in the top of the water heater x/100 Yes Yes Yes
2 03 16 bits direct Temperature °C Temperature in the bottom of the water heater x/100 Yes Yes Yes
3 03 16 bits direct Temperature °C Flue gas sensor (dummy) x/100 n.a. n.a. n.a.
4 03 16 bits direct Temperature °C Set point water heater x/100 Yes Yes Yes
5 03 16 bits direct Delta T K Hysteresis up gas burner x/256 Yes Yes Yes
6 03 16 bits direct Delta T K Hysteresis down gas burner x/256 Yes Yes Yes
7 03 16 bits direct State - Unit state - Yes Yes Yes
8 03 16 bits direct Relay - Relay: Potable water pump 1=Closed, 0=Open Yes Yes Yes
9 03 16 bits direct Burning hours Hours Burning hours water heater - Yes Yes Yes
10…14
03 16 bits direct Error - Last 5 lock outs (internal codes) - Yes Yes Yes
15…19
03 16 bits direct Error - Last 5 blocking errors (internal codes) - Yes Yes Yes
20 03 16 bits direct Error - Actual error code (internal code) - Yes Yes Yes
21 03 16 bits direct Relay ON/OFF Relay: External ON / OFF 1=Closed, 0=Open Yes Yes Yes
22 03 16 bits direct Solar State - State solar control - n.a. Yes Yes
23…27
03 16 bits direct Error - Last 5 solar errors (internal codes) - n.a. Yes Yes
28 03 16 bits direct Temperature °C Temperature solar collector (S1) x/100 n.a. Yes Yes
29 03 16 bits direct Temperature °C Solar temperature in the bottom of the tank (S2) x/100 n.a. Yes Yes
30 03 16 bits direct Temperature °C Solar temperature in the top of the storage tank (S3) x/100 n.a. Yes n.a.