Description

Modbus/TCP is an open protocol based on TCP/IP. It was one of the first protocol types to become standard in industrial Ethernet interfaces for process data exchange.

Modbus/TCP has the following characteristics:

• Modbus frames are exchanged via the TCP/IP port 502.
• Every fieldbus master IP address is accepted.
• Modbus exclusively uses the "Big Endian" coding (Motorola data format or high byte first).
• Access via "Peer Cop" is not possible. This is why it must be ensured that the used fieldbus master supports the "IO Scanning" function.