Installation and operating manual
KT-Elektronik
Control system communication
Baud rate
The baud rate of the interface to the control system (BMS) is automatically detected and adjusted by the ModBus-MBus-
Gateway. It will support 9600 and 19200 baud.
Addressing
Das Modul ist
immer
unter der globalen Stationsadresse 254 (FE-hex) im 8-Bit-Stationsadressmodus ansprechbar. Im
16-Bit-Stationsadressmodus gilt die Stationsadresse 65534 (FFFE-hex).
The module is always accessible via the global station address 254 (FE hex) in the 8-bit addressing mode. The station
address 65534 (FFFE hex) applies to 16-bit addressing mode.
Addressing at delivery
When delivered, a class derived from the serial number 8-bit address is set. The station address is the low two digits of the
serial number. A special case of this rule is any serial number with significant digits "00" in this case, the station address to
"100" set.
Addressing by slave device TROVIS 5573, SOL3-1, SOL3-7 and WPR3
The ModBus-MBus-Gateway automatically takes the address from the slave device. In the worst case, the acquisition of the
station address of the slave device takes a few minutes to complete because all station addresses in the supported
addressing modes and all supported baud rates are successively tested for recognition of a slave device.
Address change in stand-alone operation
Through two holding registers may be adjusted an 8-bit station address or a 16-bit address of the ModBus-MBus-Gateway.
The last address written determines the addressing mode of the device.
Connection to the control system BMS
For connection to an RS485 two-wire network to a building management system BMS the ModBus-MBus-Gateway provides
a potential free RS-485 interface with auto phase switching. The RS485 two-wire network can be connected to a two-pole
screw terminal or to an RJ12 jack using RJ12 patch cord. Compliance with a specific polarity is not required.
Connection to the slave device
For connectivity to a slave device the ModBus-MBus-Gateway provides an RS-485 interface through a two-pole screw
terminal and a TTL RS-232 port via an RJ45 socket.
It is just intended to connect to one slave device. The communication parameters of slave device by the MBus ModBus
gateway automatically calculated and applied.
A recognized slave device is indicated by the Status LED.
The station address is automatically transferred from the slave device, the station address set in the ModBus-MBus-Gateway
is ignored.
Holding registers and coils of ModBus-MBus-Gateway and supported slave devices are located in different areas.
Connection to MBus
For connectivity to Mbus devices provides the ModBus-MBus-Gateway an interface to a two-pole screw terminal.
The MBus ModBus gateway is intended for the connection of up to 6 MBus loads.
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EB_11997_ModBus-MBus-Gateway_EN001
