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Modbus / Electric Water Heaters
Table 43. ModBus / Electric Water Heaters Register List
Register Name
(Description)
Register
Type
R/W
Units/Format
Min Value
(if W)
Max Value
(if W)
Heating Hours
3
Input Register 1009
R
Hours
Bank 1 Number of Heat Cycles
2
Input Registers 1030 - 1031
R
Bank 2 Number of Heat Cycles
2
Input Registers1032 - 1033
R
Bank 3 Number of Heat Cycles
2
Input Registers 1034 - 1035
R
Bank 4 Number of Heat Cycles
2
Input Registers 1036 - 1037
R
Bank 5 Number of Heat Cycles
2
Input Registers 1038 - 1039
R
Bank 1 Heating Time
2
Input Registers 1010 - 1011
Hours x 100
Bank 1 Heating Days
3
Input Register 1012
R
Days
Bank 1 Heating Hours
3
Input Register 1013
R
Hours
Bank 2 Heating Time
2
Input Registers 1014 - 1015
R
Hours x 100
Bank 2 Heating Days
3
Input Register 1016
R
Days
Bank 2 Heating Hours
3
Input Register 1017
R
Hours
Bank 3 Heating Time
2
Input Registers 1018 - 1019
R
Hours x 100
Bank 3 Heating Days
3
Input Register 1020
R
Days
Bank 3 Heating Hours
3
Input Register 1021
R
Hours
Bank 4 Heating Time
2
Input Registers 1022 - 1023
R
Hours x 100
Bank 4 Heating Days
3
Input Register 1024
R
Days
Bank 4 Heating Hours
3
Input Register 1025
R
Hours
Bank 5 Heating Time
2
Input Registers 1026 - 1027
R
Hours x 100
Bank 5 Heating Days
3
Input Register 1028
R
Days
Bank 5 Heating Hours
3
Input Register 1029
R
Hours
CCB Hardware Fault Counter
Input Register 53
R
Module Fault Counter
Input Register 54
R
Temperature Probe Fault Counter
Input Register 55
R
CCB Communication Fault Counter
Input Register 69
R
ECO Fault Counter
Input Register 70
R
LWCO (Low Water Cutoff) Fault Counter
Input Register 80
R
Powered Anode Fault Counter
Input Register 83
R
Element Banks Used
Input Register 201
R
Element Fault Counter
Input Register 242
R
Elements in Bank 1
Input Register 202
R
Elements in Bank 2
Input Register 203
R
Elements in Bank 3
Input Register 204
R
Elements in Bank 4
Input Register 205
R
Elements in Bank 5
Input Register 206
R
1. Data is Version (upper 8 bits) and Revision (lower 8 bits).
2. Data stored in two 16 bit registers “Big Endian” (Higher order bits in lower register number)
3. Hours and Days used together derived from Time (hours x 100) i.e. Elapsed Time of 13612.24 hours in “Days” and “Hours” = 567
days, 4 hours.
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