Hi,
a heat pump is connected by modbus and I can read and set values. But I got a weird problem
with the heating circuits
The heat pump has two heating circuits:
- HC 1
- HC 2
- (HC 3) not used
Both have different values. For example “Heating curve end point (HCEP)” with different addresses
- HCEP 1: 5038
- HCEP 2: 5084
This is my modbus configuration for the two values:
- name: "WP EHK Heizkurvenendpunkt"
slave: 2
address: 5038
input_type: holding
unit_of_measurement: °C
state_class: measurement
offset: 0
precision: 1
min_value: 20
max_value: 70
data_type: int16
device_class: temperature
...
- name: "WP ZHK Heizkurvenendpunkt"
slave: 2
address: 5084
input_type: holding
unit_of_measurement: °C
state_class: measurement
offset: 0
precision: 1
min_value: 20
max_value: 70
data_type: int16
device_class: temperature
Both values have 42°C.
- I open the webui of the heat pump and select HC1
- I change the HCEP 1 to e.g. 44°C
- My HA shows for BOTH (HCEP 1 and HCEP 2) the value 44°C !
- I select HC 2 in the webui of the heat pump
- In the webui of the heat pump HCEP 2 is still 42°C and now the value in HA for HCEP 2 changes to 42°C. HCEP 1 still remains on 44°C in HA
- I select HC 1 in the heat pump web ui and the value in HA changes back to 44°C for both HCEP
I am kinda confused.
The documentation of the heat pump mentions that you have to write a register if you want to control the values betwen HC 2 and HC 3. But there is no HC 3 in the system!. And the documentation does not
mention this for reading values of HC 1 or HC 2
Nevertheless I would try to send a “select command” by modbus before reading the values
of HC 2. Any idea how to do that?
Best regards
Goran