45
Modbus / Gas Water Heaters
Table 38. ModBus Gas Water Heaters Register List
Register Name
(Description)
Register Type Address
R/W
Units
Min
Value
(if W)
Max
Value
(if W)
0;L/HDN'HWHFWHG
Input Status 238
R
1R/HDN
/HDN'HWHFWHG
0;,+HDWHU(QDEOH6ZLWFK
Input Status 239
R
(QDEOHVZLWFK2Q
'LVDEOHG
0;,([WHUQDO(QDEOH
Input Status 240
R
(QDEOHVZLWFK2Q
'LVDEOHG
;L,JQLWHU&XUUHQW
Input Register 1043
R
mA
;L([WHUQDO9HQW5HOD\
Input Status 163
R
2SHQ
&ORVHG
;L%ORZHU5HOD\
Input Status 165
R
2SHQ
&ORVHG
Gas Valve Relay
Input Status 166
R
2SHQ
&ORVHG
Number of Cycles
4
Input Registers 1000 - 1001
R
Elapsed Time
4
Input Registers 1002 - 1003
R
Hours x 100
Elapsed Days
5
Input Register 1004
R
Days
Elapsed Hours
5
Input Register 1005
R
Hours
Heating Time
4
Input Registers 1006 -1007
R
Hours x 100
Heating Days
5
Input Register 1008
R
Days
Heating Hours
5
Input Register 1009
R
Hours
&&%+DUGZDUH)DXOW&RXQWHU
Input Register 53
R
;L0RGHO)DXOW&RXQWHU
Input Register 54
R
Primary Temperature Fault Counter
Input Register 55
R
Secondary Temperature Fault Counter
Input Register 66
R
Communication Fault Counter
Input Register 69
R
ECO Fault Counter
Input Register 70
R
Low Gas Pressure Fault Counter
Input Register 71
R
%ORFNHG,QOHW)DXOW&RXQWHU
Input Register 72
R
%ORFNHG([KDXVW)DXOW&RXQWHU
Input Register 73
R
;L([WHUQDO9HQW)DXOW&RXQWHU
Input Register 74
R
%ORZHU3URYH)DXOW&RXQWHU
Input Register 75
R
;L,JQLWHU)DXOW&RXQWHU
Input Register 77
R
Ignition Failure Fault Counter
Input Register 78
R
Power Supply Fault Counter
Input Register 79
R
Powered Anode Fault Counter
Input Register 83
R
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modulation rate more efficient but has a slower recovery rate i.e. derates heater capacity).
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([KDXVW%ORFNHGLQWDNHDQG%ORZHUSURYH
'DWDVWRUHGLQWZRELWUHJLVWHUV³%LJ(QGLDQ´+LJKHURUGHUELWVLQORZHUUHJLVWHUQXPEHU
+RXUV DQG 'D\V XVHG WRJHWKHU GHULYHG IURP 7LPH KRXUV [ LH (ODSVHG 7LPH RI KRXUV LQ ³'D\V´ DQG
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Summary of Contents for ETH-1000
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