Broadcast mode

Application

Broadcast mode enables data to be sent from a master to any number of slaves. Data is thereby sent to the slaves. The slaves receive the data, but the master does not receive any reply from the slaves.

For broadcast mode, the master must be set to master operation with the aid of the DIP switch and register 39 must be set to broadcast mode before setting data communication. It is sufficient for the slave to be set to broadcast-slave mode via the DIP switch.

The sequence for setting the master module to broadcast-master mode is as follows:

1. Remove the write protection R31
2. Write broadcast master mode to R39
3. Read out R39 to check that master mode has really been set
4. Set the start bit in CB1

Example: Task – start the data exchange (same for master and slave)

Set bit 0 to TRUE in order to start data exchange.

CB1

SB1