The green LED is ON when the normally open contacts are
closed. Typical wiring methods will mean that the green LED is
ON when the load is ON. Verify this by trial and error if in
doubt. If the circuit is on due to an override interval or pulse, the
green LED will be flashing.
When timer power is restored after a power interruption, all loads
will initially be OFF. The timer then restores any enabled loads to
their programmed status as of midnight (12:00 A.M.) of the present
day. For this reason, for ON periods that include midnight, if load
operation is desired immediately after power restoration, use a
redundant ON set point at each affected midnight (12:00 A.M.) to
guarantee predictable catch-up. Using this same technique is
recommended when Astro ON periods include midnight.
If more than one load is scheduled to turn ON, the soft start
feature will turn them ON successively at 15 sec. intervals.
Therefore, it is generally advisable to put lighting loads on low-
numbered circuits to hasten their turn-on after power is restored.
All same-scheduled loads turn OFF simultaneously at the
scheduled time. If a soft start is not desired, program those loads
using interval or pulse.
If a soft start other than the factory setting of 15 seconds is desired
press
SET UP;
and the date will be displayed. Then press
PULSE:
SS (for Soft Start) appears in the left two displays with
3 dashes in the rightmost displays. Enter the soft start desired
by keying in a number from 1 to 127 seconds, and then press
OK.
This new soft start allows you to lengthen or shorten the
15-second soft start and will affect all available circuits.
Loads that are operated by pulses (such as latching contactors) may
not be restored to the expected condition if any ON/OFF pulses
occurred during the power interruption. Consider using fixed
ON/OFF schedules in conjunction with either self-clearing
contactors or contactors adapted for “two wire control”.
The display will show the selected day followed by COPY. Now
key in the day you wish to copy to and press
OK
to confirm.
Select and
OK
additional copy to days as required.
Four rules need to be followed when using COPY:
1) You cannot copy to a day that has already been programmed.
2) You cannot copy from a day which has already been copied to.
3) You cannot copy to or from a day group.
4) The COPY feature copies the programmed schedules of all the
circuits of the copy from day to the corresponding circuits of
the copy to day regardless of the positions of the circuit
Enable
switches. Individual circuit schedules may not be copied
independently.
HELP provides help messages specific to each step in SET UP and
PROGRAM. If you make an error, it will be indicated in the
LED
display with an error code. (See Error Messages at the back of this
booklet, or press
HELP
to scroll the message across the display.)
Pressing any key or allowing the message to finish returns the display
to the condition before the error was made.
LOAD CONTROLS
There are two controls and an LED indicator for
each load.
Enable/Disable
activates automatic
switching of the load by the time switch, enables
the override function in
RUN
mode and selects
circuits being programmed in
SET
mode.
The
ON/OFF
key manually switches the load independently of the
time switch and cancels any previously initiated activity, including
PULSEs, INTVLs (Intervals) or override intervals and override
pulses. If an override interval or pulse has been programmed,
pressing the
ON/OFF
key of a circuit that is Enabled will initiate
that override. In order to manually switch the load ON or OFF in
this situation, you must slide the
Enable/Disable
switch to
Disable
, press the
ON/OFF
key, then return the slide switch to
Enable
in order to allow the time switch to follow subsequent set
points. The
ON/OFF
key does not interfere with events that occur
after its use. The ON/OFF keys and LEDs will operate the loads and
indicate status regardless of the position of the RUN/SET switch.
Next Generation
11
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