BECKHOFF BK2000 - Manual (Page 20)

Beckhoff-Lightbus coupler BK2000
20 BK2000
The BK2xxx bus couplers
Bit Description
support the status D2.0 Command error
messages via the D2.1 Input data error
Beckhoff-Lightbus D2.2 Output data error
D2.3 Timeout error
D2.4 K-bus reset error
D2.5
D2.6
D2.7 Inputs valid
D3.0 Toggle pattern for operation without interrupt (Page 0 only)
D3.1 Toggle pattern for operation without interrupt (Page 0 only)
D3.2 Toggle pattern for operation without interrupt (Page 0 only)
D3.3 Toggle pattern for operation without interrupt (Page 0 only)
D3.4 Toggle pattern for operation without interrupt (Page 0 only)
D3.5 Toggle pattern for operation without interrupt (Page 0 only)
D3.6 Toggle pattern for operation without interrupt (Page 0 only)
D3.7 Toggle pattern for operation without interrupt (Page 0 only)
Special functions
The following special functions are entered in Page 0 (control byte 10hex)
at the address 254 (D0 = "FEhex").
The BKxxx bus couplers
Bit Description
support the special D2.0
Functions via the Beckhoff- D2.1
Lightbus D2.2
D2.3 Allocation to the S5 PLC (only with master C1120)
D2.4 Allocation to the fast communication channel
D2.5
D2.6
D2.7 Immediate auto reset if K-bus error
D3.0 Connect digital input 0.0 to Beckhoff-Lightbus IRQ0
D3.1 Connect digital input 0.1 to Beckhoff-Lightbus IRQ1
D3.2 Connect digital input 0.2 to Beckhoff-Lightbus IRQ2
D3.3 Connect digital input 0.3 to Beckhoff-Lightbus IRQ3
D3.4 FreeRun Write (without watchdog)
D3.5 FreeRun Write (with watchdog)
D3.6 FreeRun Read
D3.7 Auto reset after diagnostics flashing sequence
Update and Int command
synchronisation
In addition to user information data traffic, which is handled automatically
by the master, it is possible to send control commands to one or to all
slaves simultaneously. These control commands are transferred as single
trigger or as broadcast functions. With these control commands, it is
possible to specify updating of the input/output level to synchronize all
BK2000s. The BK2000s begin updating when they receive an "update" or
an "Int control command" from the assigned master. With the broadcast
function, the outputs of all addressed BK2000s are frozen at their
momentary status. During subsequent user information data transfers, the
output data of the BK2000s is stored, but the output statuses remain
unchanged. The stored output data is switched through to the outputs
when the next update or Int control command is received from the master.
The user can read back the update control command after successful
execution.