Chengdu Ebyte Electronic Technology Co., Ltd.
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4. Product Features
4.1 Operating mode
The working mode is divided into master mode and slave mode, which are configured by Modbus register 40081
(0x0050). When the register value is 0, it is the master mode; when the register value is 1, it is the slave mode, the default
slave mode.
4.1.1 Slave mode
In slave mode (register value 0x01), the data sent to the device by the network or 485 terminal (sender) satisfies the
Modbus RTU, Modbus TCP protocol, and the address in the data is the device address, and the device will reply with the
same protocol. If the data sent by the network or 485 bus to the device does not satisfy the Modbus RTU, Modbus TCP
protocol, or the Modbus RTU or Modbus TCP protocol is met but the data address is not the device address, the data of
the sender will be discarded.
In the slave mode, the device can directly connect to the device in the host mode through the 485 bus. When the
slave is not connected to the network, the network can also access the data of the slave through the host.
4.1.2 Master mode
In master mode (register value is 0x00), the data sent by the network or 485 bus (transmitter) to the device satisfies
the Modbus RTU, Modbus TCP protocol, and the address in the data is the device address, and the device responds to the
sender with the same protocol. If the data sent by the network or 485 bus to the device does not satisfy the Modbus RTU,
Modbus TCP protocol, or the Modbus RTU, Modbus TCP protocol but the data address is not the device address, the data
from the 485 bus will be transmitted to the network. On the network, the data from the network will be transmitted to the
485 bus.