24.4.4 Command Communication

The BiSS module allows commands to be sent simultaneously to four clients in any desired combination. This can be achieved by addressing specific clients or broadcasting to all clients on the bus.

Table 24-3. Broadcast Command Options
CommandDescription
11Reserved
10All bus couplers switched to bypass.
01Register and command communication are activated.
00Data channels are deactivated.

Table 24-4. Addressed Command Options
CommandDescription
11Definable for each secondary
10The addressed bus couple switches from bypass to line operation.
01Register and command communication of addressed secondary are deactivated.
00Addressed data channel is activated.
Figure 24-10. Command Frame
Note:
  1. The Control Select bit (CTS) is zero (CTS =0) for the command frame.
  2. The secondary ID is assigned according to the sequence in the chain.
  3. To send commands to all secondaries (broadcast) IDS bits= 00000000 (none of the IDS bits is set.).