22.3.4 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 22-15. Broadcast Command Options
CommandDescription
11Reserved
10All bus couplers switched to bypass
01Register and command communication is activated
00Data channels are deactivated

Table 22-16. 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 is deactivated
00Addressed data channel is activated
Figure 22-10. 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.)