Controlling a boiler the Control Setpoint
Posted: Sun Sep 29, 2013 4:42 pm
Hi all,
WIth winter approaching I have finally taken some time to investigate why I’m not able control my room temperature with my OpenTherm gateway.
Boiler: Hoval TopGas Comfort 15kW
Theromostat: Hoval TopTronic RS-T (RS-OT)
OTGW firmware: 3.4
The control setpoint of above Hoval boiler is actually driven by the RS-OT thermostat. Unlike many other boiler the thermostat is not sending a room setpoint to the boiler control which then calculates the boiler control set point (so heating circuit hot water temperature). The thermostat uses the thermostat room setpoint, the external temperature (coming from the external sensor connected to the boiler control and sent via OT to the thermostat) and the heating curve (which is selected on the thermostat) to calculate a boiler control setpoint. The control boiler setpoint is sent to the boiler via OT.
12:20:34.718596 T90012C33 Write-Data Control setpoint: 44.20
12:20:34.825464 B50012C33 Write-Ack Control setpoint: 44.20
This means that with current OTGW firmware, I’m not able to control anything (aside from DHW).
Has anyone else the same time of regulation on their boiler?
Schelte, would it be possible to implement an additional command to set the boiler control setpoint? My homework then to emulate the correct calculation logic of the control set point...
Arnaud
WIth winter approaching I have finally taken some time to investigate why I’m not able control my room temperature with my OpenTherm gateway.
Boiler: Hoval TopGas Comfort 15kW
Theromostat: Hoval TopTronic RS-T (RS-OT)
OTGW firmware: 3.4
The control setpoint of above Hoval boiler is actually driven by the RS-OT thermostat. Unlike many other boiler the thermostat is not sending a room setpoint to the boiler control which then calculates the boiler control set point (so heating circuit hot water temperature). The thermostat uses the thermostat room setpoint, the external temperature (coming from the external sensor connected to the boiler control and sent via OT to the thermostat) and the heating curve (which is selected on the thermostat) to calculate a boiler control setpoint. The control boiler setpoint is sent to the boiler via OT.
12:20:34.718596 T90012C33 Write-Data Control setpoint: 44.20
12:20:34.825464 B50012C33 Write-Ack Control setpoint: 44.20
This means that with current OTGW firmware, I’m not able to control anything (aside from DHW).
Has anyone else the same time of regulation on their boiler?
Schelte, would it be possible to implement an additional command to set the boiler control setpoint? My homework then to emulate the correct calculation logic of the control set point...
Arnaud
Code: Select all
12:20:30.550021 T907C024D Write-Data OpenTherm version Master: 2.30
12:20:30.632969 B507C024D Write-Ack OpenTherm version Master: 2.30
12:20:31.560199 T107E0118 Write-Data Master product version: 1 24
12:20:31.663844 BD07E0118 Write-Ack Master product version: 1 24
12:20:32.612990 T10800000 Write-Data Message ID 128: 0
12:20:32.671801 BD0800000 Write-Ack Message ID 128: 0
12:20:33.665351 T00000300 Read-Data Status: 00000011 00000000
12:20:33.739571 BC000030A Read-Ack Status: 00000011 00001010
12:20:34.718596 T90012C33 Write-Data Control setpoint: 44.20
12:20:34.825464 B50012C33 Write-Ack Control setpoint: 44.20
12:20:35.770669 T90020016 Write-Data Master configuration: 00000000 22
12:20:35.898327 B50020016 Write-Ack Master configuration: 00000000 22
12:20:36.822440 T00030000 Read-Data Slave configuration: 00000000 0
12:20:36.881744 BC0031908 Read-Ack Slave configuration: 00011001 8
12:20:37.875614 T00050000 Read-Data Application-specific flags: 00000000 0
12:20:37.979024 BC0050000 Read-Ack Application-specific flags: 00000000 0
12:20:38.927924 T00060000 Read-Data Remote parameter flags: 00000000 00000000
12:20:39.058108 B40060301 Read-Ack Remote parameter flags: 00000011 00000001
12:20:39.980944 T900E6400 Write-Data Maximum relative modulation level: 100.00
12:20:40.526278 B500E6400 Write-Ack Maximum relative modulation level: 100.00
12:20:41.033024 T10101800 Write-Data Room setpoint: 24.00
12:20:41.136939 BD0101800 Write-Ack Room setpoint: 24.00
12:20:42.090059 T00110000 Read-Data Relative modulation level: 0.00
12:20:42.217293 BC0113900 Read-Ack Relative modulation level: 57.00
12:20:43.143293 T10140C0B Write-Data Day of week and time of day: Unk 12:11
12:20:43.222014 BD0140C0B Write-Ack Day of week and time of day: Unk 12:11
12:20:44.190537 T1015091D Write-Data Date: 9 29
12:20:44.299443 BD015091D Write-Ack Date: 9 29
12:20:45.316778 T901607DD Write-Data Year: 2013
12:20:46.101525 B501607DD Write-Ack Year: 2013
12:20:46.421619 T1018114C Write-Data Room temperature: 17.30
12:20:46.437549 BD018114C Write-Ack Room temperature: 17.30
12:20:47.347399 T80190000 Read-Data Boiler water temperature: 0.00
12:20:47.455686 B40192C80 Read-Ack Boiler water temperature: 44.50
12:20:48.400382 T801A0000 Read-Data DHW temperature: 0.00
12:20:48.485135 B401A2AB3 Read-Ack DHW temperature: 42.70
12:20:49.452431 T001B0000 Read-Data Outside temperature: 0.00
12:20:49.514878 B401B0DDE Read-Ack Outside temperature: 13.87
12:20:50.552077 T801C0000 Read-Data Return water temperature: 0.00
12:20:50.614961 B401C27CC Read-Ack Return water temperature: 39.80
12:20:51.560055 T00300000 Read-Data DHW setpoint boundaries: 0 0
12:20:51.628009 BC0303C05 Read-Ack DHW setpoint boundaries: 60 5
12:20:52.609735 T80380000 Read-Data DHW setpoint: 0.00
12:20:52.707420 B40380A00 Read-Ack DHW setpoint: 10.00
12:20:53.668569 T00390000 Read-Data Max CH water setpoint: 0.00
12:20:53.773390 B40394600 Read-Ack Max CH water setpoint: 70.00
