solved: wrong exhaus temp (possible OTGW bug?)
Posted: Sun Feb 05, 2017 9:58 am
Exhaust temperature in the OTGW Summary page is wrong. The exhaust temperature is one of the value needed to compute Boiler Efficiency.
The value obtained by OTGW is between 0.00 and 0.18 while the value displayed by OT Master (QAA73) is more reasonable.
Currently on my system:
QAA73 Exh. Temp: 43 °C
OTGW Exh. Temp: 0.18 °C
The freq. of Exh. Temp in Summary table also varies from 1 to 25 (is it OK?)
The system is Geminox THRi 2-17 DC Boiler as OT Slave (Siemens LMU64 3.03) and QAA73 as OT Master (ver. 1.05), OTGW 4.2.4 and otmonitor 4.3 running on Linux-Armhf.
One other user already reported the same problem, unfortunately no solution has been found: viewtopic.php?f=75&t=10041&p=72218&hilit=exhaust#p72218
For reference, there is current OTGH summary table of my system, otmonitor log upon request:
Hex Dec Dir Description Freq Value
05 5 Read Application-specific flags 51246 00000000 132
19 25 Read Boiler water temperature 24 51.47
12 18 Read CH water pressure 250 1.51
01 1 Write Control setpoint 25 48.28
08 8 Write Control setpoint 2 25 38.39
15 21 Write Date 299 Feb 5
14 20 Write Day of week and time of day 299 Sun 08:26
38 56 Write DHW setpoint 11 52.00
30 48 Read DHW setpoint boundaries 250 65 10
1A 26 Read DHW temperature 24 52.09
21 33 Read Exhaust temperature 25 0.18
1F 31 Read Flow temperature CH2 24 38.20
02 2 Write Master configuration 250 00000000 4
7E 126 Write Master product version 250 1 1
31 49 Read Max CH setpoint boundaries --- 89 20
39 57 Read Max CH water setpoint 250 89.00
0E 14 Write Maximum relative modulation level 250 100.00
81 129 Write MessageID 129 24 2574
82 130 Write MessageID 130 24 20819
89 137 Write MessageID 137 --- 526
1B 27 Read Outside temperature 24 1.94
11 17 Read Relative modulation level 24 45.00
06 6 Read Remote parameter flags 250 00000111 00000111
1C 28 Read Return water temperature 24 38.62
10 16 Write Room setpoint 24 22.00
10 16 Read Room setpoint --- 17.16
17 23 Write Room Setpoint CH2 24 22.00
18 24 Write Room temperature 24 20.58
03 3 Read Slave configuration 250 00101001 4
7F 127 Read Slave product version 250 100 1
00 0 Read Status 6 00010011 00101010
16 22 Write Year 299 2017
Thank you for help with this issue.
Roman
The value obtained by OTGW is between 0.00 and 0.18 while the value displayed by OT Master (QAA73) is more reasonable.
Currently on my system:
QAA73 Exh. Temp: 43 °C
OTGW Exh. Temp: 0.18 °C
The freq. of Exh. Temp in Summary table also varies from 1 to 25 (is it OK?)
The system is Geminox THRi 2-17 DC Boiler as OT Slave (Siemens LMU64 3.03) and QAA73 as OT Master (ver. 1.05), OTGW 4.2.4 and otmonitor 4.3 running on Linux-Armhf.
One other user already reported the same problem, unfortunately no solution has been found: viewtopic.php?f=75&t=10041&p=72218&hilit=exhaust#p72218
For reference, there is current OTGH summary table of my system, otmonitor log upon request:
Hex Dec Dir Description Freq Value
05 5 Read Application-specific flags 51246 00000000 132
19 25 Read Boiler water temperature 24 51.47
12 18 Read CH water pressure 250 1.51
01 1 Write Control setpoint 25 48.28
08 8 Write Control setpoint 2 25 38.39
15 21 Write Date 299 Feb 5
14 20 Write Day of week and time of day 299 Sun 08:26
38 56 Write DHW setpoint 11 52.00
30 48 Read DHW setpoint boundaries 250 65 10
1A 26 Read DHW temperature 24 52.09
21 33 Read Exhaust temperature 25 0.18
1F 31 Read Flow temperature CH2 24 38.20
02 2 Write Master configuration 250 00000000 4
7E 126 Write Master product version 250 1 1
31 49 Read Max CH setpoint boundaries --- 89 20
39 57 Read Max CH water setpoint 250 89.00
0E 14 Write Maximum relative modulation level 250 100.00
81 129 Write MessageID 129 24 2574
82 130 Write MessageID 130 24 20819
89 137 Write MessageID 137 --- 526
1B 27 Read Outside temperature 24 1.94
11 17 Read Relative modulation level 24 45.00
06 6 Read Remote parameter flags 250 00000111 00000111
1C 28 Read Return water temperature 24 38.62
10 16 Write Room setpoint 24 22.00
10 16 Read Room setpoint --- 17.16
17 23 Write Room Setpoint CH2 24 22.00
18 24 Write Room temperature 24 20.58
03 3 Read Slave configuration 250 00101001 4
7F 127 Read Slave product version 250 100 1
00 0 Read Status 6 00010011 00101010
16 22 Write Year 299 2017
Thank you for help with this issue.
Roman