Heizbösch Controllers

[wewa00]

Hello,

I wonder if there is already experience with branded Siemens contollers. I have a central gas heating system where a RVA47 B2-S serves as master and controls the pump of the domestic hot water and the gas boiler. A RVA46 D2 is connected via LPB and controls the heating circuit (mixer valve and pump). Both RVA controllers are branded with "heizbösch".

I now tried to connect BSB-LAN v5.0 serving as a QAA70 room unit via PPS to the RVA46. I can see that the BSB-LAN is recognized as a QAA70 by the RVA46, because the RVA46 confirms this via its parameter line nr. 62. But both RVAs display "Err" and stop operation. When I set the BSB-LAN to passive mode, "Err" disappears and both RVAs resume operation. Additonally I recognized that the RVA46 dropped at least my heating time setting and configured 06:00 until 22:00 as heating time for all days.

I also can see changes performed on the RVA46 (e.g. operation mode selection) reflected in BSB-LAN.

Some additional information on the RVAs. I downloaded some manuals from https://www.manualslib.de/manual/249309/Siemens-Rva36-531.html. And when I compare the parameters from the manual with the ones on my RVAs, I can see that the parameters are on a different location. E.g. the time table configuration start with parmeter nr. 10 on my RVA46 with the day selection, where this parameter has the number 5 in the manual.

Does anyone have experience with controllers and why are my controllers going to Error?

Best regards
wewa

[fredlcore]

PPS is a tricky protocol. Other than BSB and LPB, the heating system continuously requests the status of the parameters which are stored in the room unit. That's why you can only have a QAA and BSB-LAN in passive mode. If you put BSB-LAN in room unit mode, you have to remove the QAA. Otherwise, both will send their data to the heater and thereby confusing it.
The "Err" may have many reasons, it could be that both QAA and BSB-LAN are sending data, or that certain parameters that the heater deems important have invalid values (such as room temperature is 0) etc.

Parameter numbers are sometimes shifted, depending on the OEM and are a pain in the back, that's why we made our own range in 15000 and above.

[wewa00]

I only have the BSB-LAN active. There is no physical room unit. Therefore I want to use BSB-LAN as an intelligent room unit.

But the suggestion with invalid values seems promising. I'll try tomorrow again with valid values.

[fredlcore]

It would explain why your time programs have been erased, because they are set to 0 in BSB-LAN initially. The same goes for all other parameters because these are stored in the room uni,not the heater, so BSB-LAN has no way of knowing them. You must set them once, then most of them stored in EEPROM. But you must make sure that especially the temperatures have vaild values...

[wewa00]

I now made sure to have all necessary values set to meaningfull values. But still the same, the RVAs report "Err". The difference now, I couldn't notice any values lost. I also can see e.g. the measured outside temperature represented in BSB-LAN. And parameter 62 on RVA46 reports "1 83". So all of this indicates that principially the communication is ok.

How can I find the reason for "Err" beeing reported?

Does the log help?
putty.log

[fredlcore]

The log shows that your heater also increases the high nibble of the first byte in the request telegrams (0x17, 0x27, 0x37 etc.) Under normal circumstances, BSB-LAN only answers to 0x17 telegrams. Maybe that's where the error comes from because the heater does not get enough responses. So far, we have only encountered this with the RVD130 controller. So you might have more luck if you set QAA type to RVD130?

[wewa00]

This also not the solution. With the setting RVD130, still in Err mode. Here is the log with RVD130 setting. Further ideas?
putty.log

[fredlcore]

I just saw that your BSB-LAN version is half a year old. It is explicitly stated in the bug report section that you have to use the most recent version of BSB-LAN.

[fredlcore]

Also, are you sure that you have set BSB-LAN's QAA setting to room unit mode? It looks like passive because it is not even responding to the 0x17 RTS telegrams, as it should at least.

[wewa00]

Regarding the version: I tried to use the most recent commit. But it didn't boot on my device (can't recall the error message now). Therefore I rolled back to the most recent Tag, which was v5.0. And this version worked.

Regarding "room unit mode": Yes I had it configured to room unit mode. But my test was like this. Starting in passive mode, switching to room unit mode -> Err appears, switching back to passive mode to see Err disappear again. The log contains all of this.
I guess it would be easier if I create separate log files. Sorry for that.

[fredlcore]

If the most current version doesn't work on your device, then this is the first problem you need to fix. I don't support problems that arise from old versions. And secondly, I don't care (yet) about the "Err", as long as there is no proper communication on the bus.

[fredlcore]

Please continue in the issue I created, as this is a bug issue, not a discussion.

[wewa00]

Hello again,

I now tested 7fbd177. Et voilà, PPS communication is working with QAA70 configured. I can manipulate the values and receive the information from the RVA46.

@fredlcore big thanks to you for your support and that great project. 🙏

An additional question: The RVA46 is controlling heating circuit where the RV47 is controlling the gas boiler and the domestic hot water heating. BSB-LAN is connected via PPS to the RVA46. I can not see information from the gas boiler nor the domestic hot water nor can I configure e.g. the domestic hot water setpoint. Via PPS I will just get information from the RVA46 and can only set parameters of the RVA46. Is this assumption correct?

[fredlcore]

Glad to hear that it works now.
Yes, you assumption is correct. With PPS, BSB-LAN behaves just like a room unit, no more, no less. If the RVA46 is not in charge of DHW, then also a QAA couldn't do anything about that. For that, you would have to get a second BSB-LAN and connect it either to the RVA47 via PPS or to either of the two via LPB. There are cases where PPS is used for communication between boilers, but not in your case where LPB is available.