Technical Data; Technical Specifications - Nibe MODBUS 40 Installateurhandbuch

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).
Troubleshooting
MODBUS 40 has no contact with the climate
unit (does not respond)
MODBUS 40 is not activated in heat pump/indoor
■
module menu 5.2 (menu 5.2.4 for NIBE F1345, F1355,
SMO 40, VVM 225, VVM 310, VVM 320, VVM 325 and
VVM 500).
Incorrectly connected cables between MODBUS 40
■
and heat pump/indoor module. Gives a communica-
tion alarm in the heat pump's/indoor module's display.
Incorrect software in the heat pump. The software
■
version in the heat pump must be higher than 3000.
See section "General" on page 9.
Modbus 40 incorrectly connected to Modbus master.
■
Check that A is connected to + and B to -.
NOTE
Find more information about MODBUS 40 at
www.nibe.eu/modbus.
Resetting MODBUS 40
To reset the device, press the reset button as illustrated.
The device then restarts. Settings in the climate system
and Modbus master are not affected by the reset.
14
Register address
[40001-65534] included in LOG.SET
[40001-65534] not included in LOG.SET
[40001-65534]
N/A
Reset button

Technical data

Technical specifications

MODBUS 40
Rated voltage
Dimensions
Part No.
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
12 VDC 45-80 mA
154 x 108 x 40 mm
067 144
MODBUS 40 | GB