Airzone Modbus Bedienungsanleitung Seite 5

MODBUS RTU
The Modbus RTU is used with physical level RS485.
Each data byte is represented by two 4-bit hexadecimal characters. The format of the frame is
as follows:
Start 0 1 2 3 4 5 6 7 Parity Stop
EN
The Modbus RTU parameters offered by the main control boards and by the Webserver HUB
follow the following configuration:
Integration bus
Communications port speed 19 200 bps
Communication Half duplex
Frame length 8 bit
Stop bit 1 bit
Flow control None
Parity Par
MODBUS TCP/IP
This is a Modbus variant used for communications over TCP/IP networks, which is connected
through port 502. It does not require a checksum calculation, since the lower layers already
provide checksum protection.
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