B&R X20cBC0087 Bus controller

General information

Established in 1979. the Modbus protocol has approved the use of Ethernet with both Modbus TCP and Mod

bus/UDP. Today, Modbus TCP is an open Internet draft standard introduced by Schneider Automation to the In

ternet Engineering Task Force (IETF), the organization responsible for Internet standardization. The Modbus ser

vices and object model have been preserved since the original version and left unchanged for use with the TCP/

IP transmission medium.

Modbus/UDP differs from Modbus TCP in that it uses connectionless communication via UDP/IP. The advantages

of faster and easier communication with UDP/IP also brings with it the disadvantage of requiring error detection

and correction in the application layer.

This bus controller makes it possible to connect X2X Link I/O nodes to Modbus via Ethernet. The bus controller

can be operated on B&R controllers through the use of Automation Studio or on third-party systems with Modbus

TCP or -UDP master functionality.

• Fieldbus: Modbus/TCP, Modbus/UDP

• I/O configuration via the fieldbus

• DHCP-capable

• Bootp-capable

• Integrated double switch for efficient cabling

• Configurable I/O cycle (0.5 to 4 ms)

• Response time: <1 to 8 ms (depending on the load on the integrated switch)

• Validity check for command sequences before execution

Information:

Only the standard function model (see the respective module description) is supported when the bus

controller is used together with multi-function modules it has automatically configured itself.

All other function models are supported when configured accordingly in Automation Studio V4.3 or

later.

The evaluation license is permitted to be used to create complete configurations for fieldbus bus con

trollers at no cost.