Bms Mode - Wolf WRS-K Installation And Operating Instructions Manual

4.2.4 BMS mode

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4. Connection to a Modbus network
In BMS mode, all set values are specified via the Modbus interface. The
system is also switched on and off via the Modbus interface.
The following variables are effective:
- Set temperature from BMS
- Set speed, supply air fan from BMS
- Set speed, extract air fan from BMS
- Set value, fresh air proportion from BMS
- Set pressure, supply air from BMS
- Set pressure, extract air from BMS
- Set flow rate, supply air from BMS
- Set flow rate, extract air from BMS
- Set value, fan mode from BMS
- Set value, relative humidity from BMS
- Set value, absolute humidity from BMS
- Operating mode
Via set value, fan mode from BMS, the fans are switched on and the system
is enabled with the set values specified via the Modbus interface:
For single stage and variable speed fans:
Value Explanation
0 System OFF
1 System ON
For multi stage fans (2- or 3-stage):
Value Explanation
0 System OFF
1 System ON with fan stage 1
2 System ON with fan stage 2
3 System ON with fan stage 3
Outside temperature specification via BMS:
If the option "Outside temperature BMS" is enabled via the contractor menu,
the outside temperature value can be specified via the BMS (Temperature_
Outside_BMS).
Systems with BMK-F remote control:
Set temperature:
If the set value has been altered via the remote control, a new set value
specification is accepted via the Modbus interface when the value of set
temperature from BMS is changed.
Set speed / pressure:
If the set value has been altered via the remote control, a new set value
specification is accepted via the Modbus interface when the value of set
speed, supply air fan from BMS or set speed, extract air fan from BMS (or
set pressure, supply air from BMS, or set pressure, extract air from BMS)
is changed. As soon as a new set value for supply air or extract air is
specified, the set values specified via the Modbus interface for supply air
and extract air are enabled.
If the set value for the supply air speed or supply air pressure is set to 0, the
set value for the extract air speed is also set to 0.
Set value for fresh air proportion:
If the set value has been altered via the remote control, a new set value
specification is accepted via the Modbus interface when the value of the set
value, fresh air proportion from BMS is changed.
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