6.3 Modbus slave
6.3.1 Use cases for Modbus slave engineering
The 'Modbus Slave BAcnet Adapter' allows to modify parameters during runtime
and supports the following use cases:
●
Read/write data items for operation and monitoring by a third party HMI.
●
Read/write data items for automation and control functions by a third party
Building Automation and Control System (BACS).
6.3.2 Port description and default settings
The 2 Modbus slave interfaces:
Modbus Slave Port1
Modbus Slave Port2
Terminal: T12
Terminal: T16
Address: 1
Address: 2
The default settings are the same for both interfaces:
Baudrate
19200 Bd
Data
8 Bit
Parity
Even
Stop bit
1
6.3.3 Port adjustments
The 2 ports are preconfigured. You can make any required changes to the
configuration via a BACnet browser, e.g. YABE browser. Choose the following
BAcnet objects for Modbus slave configuration:
Setting (long name)
BACnet object
Infra’NwkPortI
P_1
NwkPort,2
Object type 264
Infra’NwkPortI
P_2
NwkPort,3
Object type 264
Engineering of communicative devices
Modbus slave
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