Lots of names duplicated in the ehp circut on my vaillant geotherm

[mikopp]

Hi Forum,

I am using ebusd now for several month and so far so good. However I have several quirks that I cannot explain. One of them is that some values seem not to get updated, very often those are values that I can see twice in the find list. E.g. this is part of my "find"

ehp HcReturnTemp = no data stored
ehp HcReturnTemp = no data stored
ehp HcReturnTempOffset = no data stored
ehp HeatPumpStatus = off
ehp HeatPumpStatus = no data stored
ehp HeatpumpType = brinetowater
ehp HwcHcValve = no data stored
ehp HwcHcValve = no data stored
ehp HwcHcValveStarts = no data stored
ehp HwcLaggingTime = no data stored
ehp HwcLoadingDelay = no data stored
ehp HwcModeDemandHours = no data stored
ehp HwcModeFulfilledHours = no data stored
ehp HwcPumpStarts = no data stored
ehp HwcSwitch = no data stored
ehp HwcTemp = 33.50;ok
ehp HwcTemp = no data stored
ehp FlowTemp = 31.12;ok
ehp FlowTemp = no data stored
uih FlowTemp = 24.38;ok
uih FlowTempDesired = no data stored

I am especially interested in the HeatPumpStatus. It is always shown as off, even when the system is definitely using it. I would also be interested in internal pump that circulates the fluid through my floor heating, I know this is on at the time when I collected this data (both based on the VR90 and by physically looking at the pipes) but couldn't find it. I also checked the FlowTemp which at this point is 24 as shown in the uih circut but still at 31 in ehp (which it is when the system.

Here is the output of info

root@loxberry:/opt/loxberry# ebusctl -p 8889 info
version: ebusd 24.1.24.1
update check: OK, device firmware v5 1[4c15] up to date
device: /dev/ttyACM1, serial high speed, enhanced, firmware 1.1[4c15].1[4c15]
signal: acquired
symbol rate: 75
max symbol rate: 288
min arbitration micros: 3
max arbitration micros: 1367
min symbol latency: 0
max symbol latency: 22
scan: finished
reconnects: 1
masters: 6
messages: 635
conditional: 213
poll: 3
update: 60
address 03: master #11
address 08: slave #11, scanned "MF=Vaillant;ID=EHP00;SW=0383;HW=7201", loaded "vaillant/08.ehp.csv"
address 10: master #2
address 15: slave #2, scanned "MF=Vaillant;ID=UIH00;SW=0274;HW=6901", loaded "vaillant/15.uih.csv"
address 23: slave, scanned "MF=Vaillant;ID=EHP00;SW=0383;HW=7201", loaded "vaillant/23.ehp.cc.csv"
address 25: slave, scanned "MF=Vaillant;ID=EHP00;SW=0383;HW=7201", loaded "vaillant/25.ehp.hwc.csv"
address 31: master #8, ebusd
address 36: slave #8, ebusd
address 3f: master #23
address 50: slave, scanned "MF=Vaillant;ID=EHP00;SW=0383;HW=7201", loaded "vaillant/50.ehp.mc.csv"
address 70: master #4
address 75: slave #4, scanned "MF=Vaillant;ID=RC C ;SW=0507;HW=6201", loaded "vaillant/75.rcc.csv"
address 7f: master #24

So here my question.

• Why are there some names shown twice, but I seem to have no way to access the second one.
• I know that HeatPumpStatus only exists in 08.ehp, and as far as I see this is only loaded once, so why does it exist twice?
• Why are some values like FlowTemp not always updated (also explicit read does not change anything) on ehp but are updated on a different circut (I guess this might be specific to vaillant, but maybe somebody knows why?).
• In general what is the uih circut (couldn't find a description of uih vs ehp)

Thanks for the help
Mike

[mikopp]

Ok,

I found some things by poking around. It seems there are two different sensors for the FlowTemp. uih Flow Temp and ehp HcFlowTemp are both an internal sensor and ehp FlowTemp seems to be an external one (mounted on the pipe). They also will be different (for obvious reasons the internal one is higher). However what I do not know is why the ehp Flow temp is only updated when the heating is active, but not if the pump is running. That is probably vailant specific.

That leaves my main question, why the duplicated names? and is there a better description for the uih circut?