Modbus Master - Nibe MODBUS 40 Installateurhandbuch

CONNECTING TO MODBUS-MASTER
The external Modbus master is connected to terminal
block X2 on the Modbus board (AA9).
NOTE
MODBUS 40 uses the communications
standard RS485.
Connect the master with a cable according to
the recommendations for RS485.
MODBUS 40
MODBUS 40
GND
_
B
A
+
AA9-X2
Installation
SETTINGS

MODBUS MASTER

Method RTU
Speed 9600 baud
Word length 8 bits
Parity None
Stop bits 1
Address Fixed 0x01 up to and including
Modbus 40 v.7.
Selectable 1 - 247 from and including
Modbus 40 v.10.
Caution
Software version v.10 in MODBUS 40 is re-
quired to manage selectable addresses. To
check the software version, enter menu 3.1
"Service info" in your climate unit.
The climate unit's software must be software
version 5539 (4150R7 for NIBE F1345) or later
in order for it to work with v.10 in MODBUS 40.
If it is not, update the software. Visit
www.nibeuplink.com to download your update
file.
MODBUS 40 | GB
EXTERNT
External
Modbus master
CLIMATE UNIT
1. Start the climate unit and select MODBUS 40 in
menu 5.2 "System settings" (menu 5.2.4 for NIBE
F1345, F1355, SMO 40, VVM 225, VVM 310,
VVM 320, VVM 325 and VVM 500).
2. Enter the address to MODBUS 40 in menu 5.3.11.
(This menu is only visible if MODBUS 40 has soft-
ware version v.10 or later)
In menu 5.3.11, you can also adjust settings for
3.
"word swap". (This menu is only visible if MOD-
BUS 40 has software version 11 or later). Factory
setting: Big Endian
Communication
TIP
ModbusManager can be downloaded via
www.nibe.eu/modbus.
UPDATING MODBUS DATABASE
For ModbusManager there is a database, which contains
all the parameters that can be logged/set for the differ-
ent products. To ensure that you have access to all se-
lectable parameters and products you should update
the ModbusManager database. This is done in Mod-
bus Updater that is part of ModbusManager. Modbus Up-
dater is located in the same installation location as
ModbusManager. When you have opened Modbus Up-
dater, press "Update database" to start the database
update.
READ THE VALUES
There are two ways of reading the values from the cli-
mate unit, automatically or manually.
• Automatic reading: can retrieve up to 20 predefined
parameters at the same time.
• Manual reading: takes longer and only one value at a
time can be retrieved.
AUTOMATIC READING
For smaller installations where 20 or fewer parameters
must be retrieved, it is appropriate to connect with a
LOG.SET file. In such cases, all parameters are updated
twice a second.
In larger installations with multiple parameters, it is ap-
propriate to use a LOG.SET file for the 20 most import-
ant parameters, which requires the timeout time to be
adjusted to 2,1 seconds. The parameters found in the
LOG.SET file are retrieved twice a second, whereas the
other parameters are retrieved at 2,1 seconds per para-
meter.
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