Watchdog Function
The Intelligent Distributor allows the SIM to deactivate the power supply for individual satellites. This possibility is used to implement a watchdog function. The relevant status telegram is used to monitor the satellites. If any of the following faults is detected by the bus master (SIM), the satellite is deactivated:
- Internal fault in the satellite.
- System time incorrect.
- Status telegram not received.
Depending on the type of fault, up to two attempts are made to switch on again after 100 ms. If the power on reset in the satellite module does not rectify the fault, the satellite remains off until the next wake-up of the bus system.