Communication between BX controllers (via SSB)

2 or more BX controllers can exchange data via the SSB. Use 2 telegrams for configuring this data exchange in the System Manager (CAN layer).

CAN telegram communication is specified via the COB ID. The BX type is irrelevant, since the SSB is present on each BX controller, and the behavior and configuration is identical.

Communication between BX controllers (via SSB)

Example configuration

BX_ONE:
Node Id 2
CAN_Out AT %QB100: ARRAY[0..7] OF BYTE
COD Id 514 0x202
CAN_In AT %IB100: ARRAY[0..7] OF BYTE
COD Id 386 0x182

BX_TWO:
Node Id 2
CAN_Out AT %QB100: ARRAY[0..7] OF BYTE
COD Id 386 0x182
CAN_In AT %IB100: ARRAY[0..7] OF BYTE
COD Id 514 0x202

Configuration and program example:

Required material

TwinCAT 2.9 build 959 or higher
2 x BXxx00
Cabling material and power supply
TwinCAT System Manager file BX_ONE (sample file)
Program file BX_ONE (sample file)
TwinCAT System Manager file BX_TWO (sample file)
Program file BX_ONE (sample file)

For the configuration download via ADS, either a BECKHOFF master (FC310x, FC510x, FC520x) or a free serial port is required.