Bausch Datacom DinBox RTU M4 Reference Manual page 34

Analog Inputs
When this threshold detection sampling is enabled, a deadband measurement for
both analog inputs will be active; the voltage on the analog inputs will be checked
after the configured number of seconds. If the voltage has changed by more
than, or equal, the entered digital value (0-2048) an event with ASDU TI36 with
IOA 420 (AI1 default) & 421 (AI2 default) will be transmitted.
Modbus Scanning
Periodic sending of Modbus measurements can be enabled here.