23 Connection to Building Management System
2022/07 99E13331xx-mub-en - V08 63
If the FC3.10 controller is operated as the physical first / last device in the Modbus network,
a termination via a jumper is required. For this, the jumper must be plugged at the right side of
the controller (see chapter
Installation of the cascade controller
) to activate the termination
resistance (120 Ohm). If the termination is not required, the jumper is plugged onto the
placeholder (at the left side of the controller).
Setting at the FC3.10 controller
The Modbus transfer parameters must have identical settings for all devices connected to the
BMS. Please set these Modbus transfer parameters in the menu
Modbus settings
by using the
installation code
9856
(possibly installation code
0011
for customer specific controller versions).
The address is a personal allocation number of the
FC3.10 controller (server) within the bus, which the
BMS addresses to during the communication.
The speed of the data transfer is set by the parameter
Baudrate. Further setting parameters such as Data
bits, Stop bits and Parity describe the basic Modbus
communication technology and must be identical to
the parameters of the BMS which is meant to be
connected.
The
Timeout
parameter is the period of time in which
at least one communication between the BMS and the
FC3.10 controller must take place.
If no communication takes place within this period of
time, the FC3.10 controller interprets this as "Timeout
error".
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