• 38 •
(3181):
(3182):
(3183):
(3184):
CLIMATIC RT_UNITARY-IOM-1508-E
COMMUNICATION
LENNOX units implement Modbus slave protocol with the following settings:
Settings
The different settings to confi gure the BMS are available in the menu:
«Watchdog» functionality with CLIMATIC.
As the CLIMATIC is passive on the bus, it cannot detect a communication failure with BMS; if any, the Roof-top would continue to
operate with the last setting sent by the BMS before the failure whatever they were.
In order to avoid this scenario and tell regularly the CLIMATIC that it is still connected to the BMS, the BMS system has to send regularly
to the adress 01h a number above 0.
On its side the CLIMATIC is decreasing the adress 01H value of 5 units every 5 seconds. If the adress 01H reach 0, the CLIMATIC
consider the communication as lost and switch to stand alone mode.
Example, the BMS is sending the value 1000 to the adress 01h, after 200s if the BMS has not sent anything else, the value will reach
0, the CLIMATIC will consider the communication as lost and the unit will regulate with its own parameters.
Modbus, BACnet, Trend, Carel
Please see the different corresponding tables in the appendix 1.
LonWorks
Please see the different corresponding tables in the appendix 2.
INPUTS / OUTPUTS CLIMATIC BOARDS
Digital inputs
Please see the different corresponding tables in the appendix 3.
Digital outputs
Please see the different corresponding tables in the appendix 4.
Analogic inputs
Please see the different corresponding tables in the appendix 5.
Analogic outputs
Please see the different corresponding tables in the appendix 6.
Serial port
Please see the different corresponding tables in the appendix 7.
address of the unit (bus id)
choice of type of protocol
choice of speed of bus
watchdog counter
Serial Line RS485 (EIA/ TIA - 485 Standard)
Transmission Mode RTU (Remote Terminal Unit)
Baudrate 120019200 Bauds
Data bits 8 bits
Parity None
Stop bits 2 bits
To Next Page
Loading...
Need help?
General
