Baud Rate Modbus RTU

What is the baud rate specified by the MODBUS RTU Protocol, give me some details about it? Also give me information about the maximum size of a MODBUS RTU frame of it? What is the default value of the Modbus RTU Protocol?

Hello sir, I am Sahil Narang. I am from Mubai. I want you to help me by providing me information regarding the Baud Rate Modbus RTU?

[Pathak]

The MODBUS standard describes an application layer messaging protocol, positioned at level 7 of the OSI model that provides "client/server" communications between devices connected on different types of buses or networks.
It standardizes also a specific protocol on serial line to exchange MODBUS request between a master and one or several slaves
In order to build the MODBUS application data unit, the client must initiate a MODBUS transaction.
It is the function which informs the server as to which type of action to perform.
The format of a request initiated by a Master is established by the MODBUS application protocol
There are no means for automated recognition of baud rates is not assigned and the same baud rate must be utilized by the Server as well as all clients connected to the bus.
No definite baud rate is specified by the MODBUS: typical baud rates are 9600 or 19200.
A transmitted Byte is coded as: 8 Bit binary value, hexadecimal 0 - 9 and A - F. The least significant Bit is sent and received first
A transmitted Byte is coded as: 8 Bit binary value, hexadecimal 0 – 9 and A – F. The least significant Bit is sent and received first
There are two basic transmission modes found in serial MODBUS connections, ASCII and RTU.
These transmission modes determine the way in which the MODBUS messages are coded. In ASCII format, the messages are readable, whereas in RTU the messages are in binary coding and cannot be read while monitoring.
The trade-off is that the RTU messages are a smaller size, which allows for more data exchange in the same time span.
One should be aware that all nodes within one MODBUS network must be of the same transmission mode, meaning MODBUS ASCII cannot communicate with MODBUS RTU and vice versa.