IV.
OPERATING GUIDE
When the supply voltage is applied, the timers are ready for operation, and the current
values before the power supply is stopped are displayed. In case these are unfinished jobs,
the corresponding LED on the front panel flashes, and if the timer was not active when the
power supply fails, the display shows the setting tLo, the LEDs for this timer are off. There
are
two
ways to start the timer:
Hold down
the button for
the
left
TIMER 1
1.
Starts the timer from the value shown on the
display. This completes the job if it did not
complete when the power was turned off.
Otherwise, holding down any of these buttons
starts the corresponding timer from the beginning.
This way of starting can be programmatically
disabled (Chapter V).
for the
right
TIMER2
If necessary, the
RESET
key combination can be selected before
starting - the times
tLo
for
both
timers are loaded. A separate
RESET
is possible via the corresponding external inputs.
2.
When an active level is applied to one of the
Start
inputs, the corresponding
timer loads time
tLo
and is activated.
After starting, the timer starts to decrease its current value until it reaches 0. During
time
tLo
the associated group of outputs is active. After its expiration, the time
tHi
is
charged and its corresponding group of outputs is activated. When tHi is over, tLo is
charged and, depending on the operating mode, it is switched to start or restart. The current
timer status is indicated by two LEDs on the front panel.
The timer is not active. The
tLo
setpoint is loaded -
not lit.
Time
tLo
is running out -
the green LED is lit.
Time
tHi
is running out
-
the red LED is lit.
Pause after power on in stage
tLo
-
green LED flashes
Pause after power on in stage
tHi
-
red LED flashes
The status of the outputs is indicated by the six dots on the display - a flashing dot
means an active output; off point - inactive.
Fig.4.1 Indication of the status of the outputs
4
out.1 out.2
out.3
out.4
out.5
out.6