X20 system modules • Bus controllers • X20BC0087
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X20 system User's Manual 3.10
4.5.8 X20BC0087
4.5.8.1 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 - 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. The B&R FieldbusDESIGNER
is available at no cost in the Downloads section of the B&R website
.
4.5.8.2 Order data
Model number
Short description
Figure
Bus controllers
X20BC0087
X20 bus controller, Modbus/TCP or Modbus/UDP interface, in-
tegrated 2x switch, 2x RJ45 connection, order bus base, power
supply module and terminal block separately.
Required accessories
System modules for bus controllers
X20BB80
X20 bus base, for X20 base module (BC, HB, etc.) and X20 pow-
er supply module, X20 end plates X20AC0SL1/X20AC0SR1 (left
and right) included
X20PS9400
X20 supply module, for bus controller and internal I/O supply,
X2X Link supply
X20PS9402
X20 supply module, for bus controller and internal I/O supply,
X2X Link supply, supply not electrically isolated
Terminal blocks
X20TB12
X20 terminal block, 12-pin, 24 VDC keyed
Table 146: X20BC0087 - Order data
4.5.8.3 Technical data
Product ID
X20BC0087
Short description
Bus controller
Modbus TCP/UDP slave
General information
B&R ID code
0x227C
Status indicators
Module status, bus function
Diagnostics
Module status
Yes, with status LED and software
Bus function
Yes, with status LED and software
Table 147: X20BC0087 - Technical data
Summary of Contents for X20 System
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