Specifications

84 Chapter 6 - Command Reference
Timer ('H','h')
Function: Controls the User Timer functions of the controller.
Enable is a byte value where the least significant bit is 1 to enable the Timer or 0 to
disable the Timer. Timer packet transmission must also be Un-Quieted with the
Quiet command, described on page 98. The factory default for the Timer is
disabled.
The TMode byte determines the action taken upon the expiration of the Timer,
either One-shot or Continuous. If the least significant bit is 1 (Continuous Mode),
the Timer is automatically restarted using the specified Interval value. If it is 0
(One-shot Mode), the Timer is disabled when it expires. The factory default for the
TMode is One-shot.
The Interval word specifies the number of Timer ticks (in 10ms increments) before
the expiration of the Timer. The factory default is 100 (1 second).
The Current word contains zero when the Timer expires and a Timer packet is sent
to the host. If queried prior to expiration or while the Timer is Quieted, Current
will contain the amount of time remaining before expiration.
NOTE
Specifying an Interval of 0 (or 1 on slow computers) will flood the host with Timer
packets so that communication with the controller may become impossible.