Set OnTimer On|Off
At power on, Set OnTimer is On by default.
This command turns on or off the ability to receive On Timer interrupts. An
interrupt occurs at every time interval set by the On Timer command.
When Set OnTimer is On, the interrupt service routine (ISR) set using the
On Timer command will be executed when the corresponding interrupt
occurs. If Set OnTimer is Off, then the ISR will not be executed when the
interrupt occurs. See also the On Timer command.