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Nibe MODBUS 40 Installateurhandbuch Seite 19

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Manual reading
Caution
Manual readout is time consuming and only
one value at a time can be read, max timeout
2,1 s. The parameter does not have to be in-
cluded in the LOG.SET file.
Retrieve a value for the Modbus-master by using the
"Read holding registers" command with the desired
parameter address. Use ModbusManager to see which
parameter address a value has. See section The Modbus
command on page 19 for further information.
Enter the values
Caution
Only one value can be entered at a time. The
parameter does not have to be included in the
LOG.SET file.
By using the "Write multiple registers" command with
the desired parameter address, a value can be updated,
if the heat pump/indoor module permits it. The values
that can be updated are in ModbusManager. See sec-
tion The Modbus command on page 19 for more in-
formation.
The Modbus command
Function
Description
ID
0x03
Read holding registers
0x10
Write multiple registers
0x2B
Read device identification**
* Two Modbus-registers are used to retrieve 32-bit parameters.
** Returns label (e.g. 'NIBE'), product code (e.g. 'F1245') and software version (e.g. 5539).
Example of parameter addresses
Parameter
Outdoor temperature (BT1)
Flow temperature (BT2)
Return temperature (BT3)
Hot water, top (BT7)
Hot water middle (BT6)
Brine in (BT10)
Brine out (BT11)
Room temperature (BT50)
Degree minutes
Register address
[40001-65534] included in LOG.SET
[40001-65534] not included in LOG.SET
[40001-65534]
N/A
Register ad-
dress
40004
40008
40012
40013
40014
40015
40016
40033
43005
No. of re-
Max
gisters
timeout
[1-20]
0,5 s
[1-2]*
2,1 s
[1-2]*
2,1 s
N/A
0,5 s
GB
19

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