5-1
5
Modbus-RTU protocol
Modbus RTU protocol is used for the product communication. Data format and error
check methods are defined in Modbus protocol. The half duplex query and respond
mode is adopted in Modbus protocol
Modbus allows PC, PLC etc. (herein referred to as master) to communicate with the
ADG-P series (herein referred to as slave), it will not allow data exchange between
slave devices. Therefore, terminal devices will not engage the communication link at
initialization but only respond to the master
’
s request.
5.1
Transmission settings
The settings of transmission define the data structure within a frame and the rules
used to transmit data.
⚫
Start bit: 1 bit
⚫
Stop bit: 1 bit
⚫
Parity: none
⚫
Data bit: 8 bits
⚫
Baud Rate: 115200 bps
⚫
The waiting period between the master sends a query and the slave responds >
50ms
⚫
The waiting period between the slave responds and the master sends a query >
50ms