BEKA BA377NE, Manual

Page: 17 / 47

17
6.4 Timer structure
Fig 12 illustrates the Timer structure and function as
a state diagram. It applies when the instrument is
measuring the time between events or is controlling
external events.
The circles in Fig 12 represent the five Timer states,
Reset , Running, Restart-delay, Paused and
Complete . The lines between the circles represent
the event required to move the Timer between
states. e.g. to initiate timing the Timer is moved
from the
Reset state to the Running state by a start
event. This could be an input signal or operation of
the
&
button. Similarly, to pause the Timer while it
is timing, the Timer must be moved from the
Running state to the Pause state by a stop event
which could be an input or operation of the
*
button.
Reset
In this state the Timer is readied for operation.
The Timer is stopped and loaded with zero for
timing-up or
5Et t
for timing-down.
Running
Entered by a start event from the Reset or
Paused states. The Timer times-up to
5et t
or times-down to zero depending upon it's
configuration.
Pause
Entered by a stop event from Running or
Restart-delay . Timer is stopped, a start event
returns the timer to it's previous state.
Restart-delay
Entered automatically from Running. At the
end of the delay time automatically returns to
Running .
Complete
Entered automatically from Running when
there are no more timing cycles to perform.
When the
CYCLE5
function is enabled the timing
cycle can be repeated a specified number of times,
or continuously.